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Yang F, Zhang L, Yang M, Chen J, Xing W. The effect of deviations in sintering temperature on the translucency and color of multi-layered zirconia. BMC Oral Health 2024; 24:471. [PMID: 38637799 PMCID: PMC11027308 DOI: 10.1186/s12903-024-04243-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 04/09/2024] [Indexed: 04/20/2024] Open
Abstract
OBJECT This study aimed to investigate the changes in the translucency and color of four different multi-layered zirconia materials when the sintering temperature were inaccurate. MATERIALS AND METHODS Two hundred zirconia samples (11 × 11 × 1.0 mm) of four multi-layered zirconia, Upcera TT-GT (UG), Upcera TT-ML (UM), Cercon xt ML (CX), and Lava Esthetic (LE), were divided into five subgroups according to the sintering temperature: L1 (5% lower temperature), L2 (2.5% lower temperature), R (recommended sintering temperature), H2 (2.5% higher temperature), H1 (5% higher temperature). After sintering, color coordinates were measured. Then the translucency parameter (TP) values, and the color differences (between the inaccurate sintering temperature and the recommended temperature) of each zirconia specimen were calculated. Statistical analysis was performed by using three-way ANOVA tests, the one-way ANOVA, and Tukey's post hoc test. RESULTS Three-way ANOVA results showed that material type, sintering temperature, specimen section, and their interactions significantly influenced the TP values (except for the interactions of specimen section and sintering temperature) (P < .05). TP values of zirconia specimens were significantly different in the inaccurate sintering temperatures (P < .05), except for the cervical and body sections of UG group (P > .05). Compared with recommended sintering temperature, higher sintering temperature caused higher TP values for CX, but lower for LE. Three-way ANOVA results showed that material type, sintering temperature, and their interactions significantly influenced the ∆E00 values (P < .05). There were no significant differences in ∆E00 values of UM and CX groups at different inaccurate sintering temperatures, and were clinical imperception (except for UM-L1) (∆E00 < 1.25). ∆E00 values of all zirconia specimens showed clinically acceptable (∆E00 < 2.23). CONCLUSION The deviations in sintering temperature significantly influenced the translucency and color of tested multi-layered zirconia. The trends of translucency in the multi-layered zirconia depended on material type and the color changes of all zirconia materials were clinically acceptable at inaccurate sintering temperatures.
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Affiliation(s)
- Fan Yang
- Graduate School of Dalian Medical University, Dalian, China
| | - Luyao Zhang
- Graduate School of Dalian Medical University, Dalian, China
| | - Minghui Yang
- Dental Technology Center, Dalian Stomatological Hospital, Dalian, China
| | - Jianfeng Chen
- Department of Stomatology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Wenzhong Xing
- Department of Prosthodontics, Dalian Stomatological Hospital, Dalian, Liaoning, 116021, PR China.
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Osuchukwu OA, Salihi A, Abdullahi I, Abdulkareem B, Salami KA, Osayamen Etinosa P, Nwigbo SC, Mohammed SA, Obada DO. A pedagogical approach for the development and optimization of a novel mix of biowastes-derived hydroxyapatite using the Box-Behnken experimental design. Heliyon 2024; 10:e23092. [PMID: 38187329 PMCID: PMC10770532 DOI: 10.1016/j.heliyon.2023.e23092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 11/13/2023] [Accepted: 11/27/2023] [Indexed: 01/09/2024] Open
Abstract
The current study details the creation of synthetic hydroxyapatite (HAp) using a combination of catfish and bovine bones (C&B). This is done to design the optimum processing parameters and consolidate instructional strategies to develop HAp scaffolds for biomedical engineering. The HAp produced from the novel mix of the biogenic materials (C&B) was through calcination and supported with the sol-gel technique, sintering, and low-cold compaction pressure. The ideal preparation conditions were identified with the aid of the Box-Behnken statistical design in response surface methodology. To understand the physicochemical and mechanical properties of the formulation, analytical studies on the synthesized HAp were carried out. To establish a substantial relation between the physicomechanical properties of the produced HAp scaffolds, three parameters- sintering temperature, compaction loads, and holding times were used. In the evaluation, the sintering temperature was found to have the greatest impact on the material's physicomechanical properties, with compressive strength (13 MPa), porosity (49.45 %), and elastic modulus (2.216 GPa) being the most enhanced properties in that order. The physicomechanical characteristics of the HAp scaffolds were at their optimal at 900 °C, 1 h 18 min of holding time, and 311.73 Pa of compaction pressure. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) results showed that powders with a dominant HAp phase were produced at all runs, including the optimum run. Therefore, using a computationally effective methodology that is helpful for novelties in biomedical engineering education, this study demonstrates the optimal process for the synthesis of a novel matrix bone-derived HAp, showing the most significant relations liable for manufacturing medically suitable HAp scaffolds from the mixture of bovine and catfish bones.
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Affiliation(s)
- Obinna Anayo Osuchukwu
- Department of Mechanical Engineering, Bayero University, Kano, 700241, Kano State, Nigeria
- Multifunctional Materials Laboratory, Shell Chair Office in Mechanical Engineering, Ahmadu Bello University, Zaria, 810222, Kaduna State, Nigeria
| | - Abdu Salihi
- Department of Mechanical Engineering, Bayero University, Kano, 700241, Kano State, Nigeria
| | - Ibrahim Abdullahi
- Department of Mechanical Engineering, Bayero University, Kano, 700241, Kano State, Nigeria
| | - Bello Abdulkareem
- Department of Mechanical Engineering, Bayero University, Kano, 700241, Kano State, Nigeria
| | - Kazeem Adeniyi Salami
- Department of Mechanical Engineering, Ahmadu Bello University, Zaria, 810222, Kaduna State, Nigeria
- Multifunctional Materials Laboratory, Shell Chair Office in Mechanical Engineering, Ahmadu Bello University, Zaria, 810222, Kaduna State, Nigeria
| | - Precious Osayamen Etinosa
- Department of Mechanical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, USA
| | - Solomon C Nwigbo
- Department of Mechanical Engineering, Nnamdi Azikiwe University, Awka, 420007, Anambra State, Nigeria
| | | | - David Olubiyi Obada
- Department of Mechanical Engineering, Ahmadu Bello University, Zaria, 810222, Kaduna State, Nigeria
- Multifunctional Materials Laboratory, Shell Chair Office in Mechanical Engineering, Ahmadu Bello University, Zaria, 810222, Kaduna State, Nigeria
- Africa Centre of Excellence on New Pedagogies in Engineering Education, Ahmadu Bello University, Zaria, 810222, Kaduna State, Nigeria
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Li JY, Tian BH, Li XX, Wang Z, Cui LP, Liang DD, Wang SL, Liu YH, Ou HA, Liang HX. Energy effective utilization of circulating fluidized bed fly ash to prepare silicon-aluminum composite aerogel and gypsum. Waste Manag 2023; 172:162-170. [PMID: 37918309 DOI: 10.1016/j.wasman.2023.10.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 10/16/2023] [Accepted: 10/20/2023] [Indexed: 11/04/2023]
Abstract
To reduce the cost of Si-Al aerogels preparation, circulating fluidized bed fly ash (CFA) was developed to be as the alternative to synthetic precursors. High energy consumption of alkali-melting and secondary wastes production were the major challenges. Here, a technique characterized by effective energy consumption and non-secondary waste was developed to convert CFA into Si-Al aerogel. The process consists two stages, preparation of Si-Al sol by sintering of CFA and Na2CO3 followed by sulfuric acid leaching, and synthesis of Si-Al aerogel by so-gel with trimethyl chlorosilane modification and ambient pressure drying. The optimization results of proportion and sintering temperature showed that the optimal temperature of sintering of Na2CO3 and CFA with the mass ratio of 0.7 was 750 °C, 100 °C lower than that of most other waste aluminosilicate materials. CaSO4·0.5H2O which meet building gypsum requirement was obtained by specifying the drying temperature of acid-leached residue at 126 °C for 2 h. The modification procedure was explored to obtain Si-Al aerogel with a large specific surface area of 857 m2/g and hydrophobic angle of 139.3°. Thermal and mechanical properties tests indicated that the Si-Al aerogels and gypsum produced from CFA exhibited promising thermal insulation and the potential application in construction.
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Affiliation(s)
- Jia-Yong Li
- College of Biomedical Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China; College of Environmental Science and Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China
| | - Bao-Hua Tian
- College of Ecology, Taiyuan University of Technology, 79 West Street Yingze, Taiyuan, Shanxi 030024, China
| | - Xin-Xin Li
- College of Ecology, Taiyuan University of Technology, 79 West Street Yingze, Taiyuan, Shanxi 030024, China
| | - Zhe Wang
- College of Safety and Emergency Management Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China
| | - Li-Ping Cui
- College of Environmental Science and Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China
| | - Dan-Dan Liang
- College of Biomedical Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China; College of Environmental Science and Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China
| | - Shuang-Lin Wang
- College of Biomedical Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China; College of Environmental Science and Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China
| | - Yu-He Liu
- College of Biomedical Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China; College of Environmental Science and Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China
| | - Heng-An Ou
- College of Materials Science and Engineering, Taiyuan University of Technology, 79 West Street Yingze, Taiyuan, Shanxi 030024, China
| | - Hai-Xia Liang
- College of Biomedical Engineering, Taiyuan University of Technology, 209 University Street, Jinzhong, Shanxi 030600, China; College of Ecology, Taiyuan University of Technology, 79 West Street Yingze, Taiyuan, Shanxi 030024, China.
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Qiu Z, Wang Z, Yuan S. How sintering temperature affects the electrochemical performance of ultra-high nickel (Ni > 0.9) cathode material. J Colloid Interface Sci 2023; 656:225-232. [PMID: 37989055 DOI: 10.1016/j.jcis.2023.11.098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/15/2023] [Accepted: 11/16/2023] [Indexed: 11/23/2023]
Abstract
The burgeoning demand for electric vehicles with extended driving ranges has propelled ongoing development efforts for ultra-high nickel (Ni > 0.9) cathode materials. Despite significant ongoing research focused on Ni-rich cathode materials, a more comprehensive foundational understanding of ultra-high nickel cathode materials is essential. In our research, we employed LiNi0.94Co0.06O2 as a model ultra-high nickel cathode material to systematically delve into the interplay between sintering temperature, structural features, and electrochemical behavior. Within a sintering temperature spectrum of 660-720 °C, we discerned that specimens produced at diminished temperatures manifest a reduced initial discharge capacity yet excel in cycling endurance. In stark contrast, their counterparts produced at augmented temperatures behave inversely. Identifying a singular sintering temperature that achieves equilibrium between initial discharge capacity and cycling performance proves elusive. Through X-ray diffraction and high-resolution transmission electron microscopy, it became evident that samples synthesized at lower temperatures exhibit pronounced lithium-nickel mixing and develop a thicker NiO layer on the surface, leading to compromised initial discharge performance and capacity. Utilizing focused ion beam scanning electron microscopy, differential capacity analysis, and in-situ X-ray diffraction, we confirm that samples synthesized at lower temperatures possess smaller particle sizes, enabling them to withstand volumetric expansion stress during cycling, resulting in enhanced cycling performance. In the realm of ultra-high nickel cathode materials, elevating the sintering temperature is a conduit to superior initial discharge efficiency and capacity. Yet, the imperative of preserving diminutive particle dimensions, as a stratagem to bolster cycling performance, stands out as a pivotal research frontier.
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Affiliation(s)
- Zhenping Qiu
- School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong 529020, PR China.
| | - Zhiwen Wang
- School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong 529020, PR China
| | - Shun Yuan
- School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong 529020, PR China
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Eskikaya O, Gun M, Bouchareb R, Bilici Z, Dizge N, Ramaraj R, Balakrishnan D. Photocatalytic activity of calcined chicken eggshells for Safranin and Reactive Red 180 decolorization. Chemosphere 2022; 304:135210. [PMID: 35679982 DOI: 10.1016/j.chemosphere.2022.135210] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/08/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
One of the most important problems affecting the environment today is the inability to adequately treat wastewater containing dyes. Among of the many treatment processes used in the treatment of dye-containing wastewater, photocatalytic based wastewater treatment processes attract the attention of scientists as a new, economically feasible, and promising approach which has been in practice for a few decades. However, in order to use these processes in wider areas, cheap and effective catalysts are still being developed today. In this study, the photocatalytic activity of eggshell-CaO produced from waste chicken eggshells was investigated for decolorization of Safranin (Basic Red 2) and Reactive Red 180 (RR180) dyes. First, sintering process was applied to the waste chicken eggshells at different temperatures (300, 600, 900 °C) in order to observe CaO formation from the eggshells. Second, the parameters such as photocatalyst amount, pH, concentration of dyes, and reaction time were optimized on dye removal efficiency in photocatalytic experiments. The optimum conditions were performed under visible light and found to be 1 g/L of catalyst amount (sintered at 900 °C), original solution pH (6.80 for Safranin and 6.60 for RR180), and 5 mg/L of dye concentration. The photocatalytic removal efficiencies of Safranin and RR180 dyes were 100% and 97.90%, respectively, under the determined optimum experimental conditions. The adsorption efficiency of the dyes that could be realized during the photocatalytic experiment was measured as 20.99% and 9.99% for Safranin and RR180 dyes, respectively.
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Affiliation(s)
- Ozan Eskikaya
- Department of Energy Systems Engineering, Faculty of Technology, Tarsus University, Tarsus, 33400, Turkey
| | - Melis Gun
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey
| | - Raouf Bouchareb
- Department of Environmental Engineering, Saleh Boubnider University, Constantine, 25000, Algeria
| | - Zeynep Bilici
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey
| | - Nadir Dizge
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey
| | | | - Deepanraj Balakrishnan
- College of Engineering, Prince Mohammad Bin Fahd University, Al Khobar, 31952, Saudi Arabia.
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Grambow J, Wille S, Kern M. Impact of changes in sintering temperatures on characteristics of 4YSZ and 5YSZ. J Mech Behav Biomed Mater 2021; 120:104586. [PMID: 34044252 DOI: 10.1016/j.jmbbm.2021.104586] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/30/2021] [Accepted: 05/09/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the effect of different sintering temperatures on biaxial flexural strength (BFS), dynamic loading, surface hardness, color reproduction, translucency, surface roughness and microstructure of zirconia with 4 mol% yttria (4YSZ) compared to zirconia with 5 mol% yttria (5YSZ). METHODS Zirconia discs with 12 mm diameter and 1.2 mm thickness were prepared and divided into three groups (n = 53) according to different sintering temperatures (1400 °C, 1500 °C and 1600 °C). Each group was divided into five subgroups (n = 10) according to the dynamic loading procedure (none, 50%, 65%, 75% and 80%) conducted before the quasi-static BFS test and another subgroup (n = 3) used for X-ray-diffraction (XRD) microstructure analysis. BFS test and dynamic loading were performed with a piston-on-three-ball test. The surface hardness was evaluated according to Vickers. Color reproduction and translucency were measured with a spectrophotometer. A 3D laser scanning microscope was used to determine the surface roughness. Grain size measurements were performed using SEM. RESULTS A significant increase in biaxial flexural strength was observed while the sintering temperature decreased. 4YSZ had significantly higher results in biaxial flexural strength than 5YSZ. A decrease in sintering temperature resulted in a significant increase in Vickers hardness. Furthermore, 4YSZ showed significantly better color reproduction with increasing sintering temperature. At higher temperatures (1500 °C and 1600 °C), 4YSZ showed better color reproduction than 5YSZ. Compared to 4YSZ, specimens of 5YSZ exhibited significant higher translucency. Using XRD, a distorted tetragonal phase was detected in addition to regular tetragonal and cubic phases in specimens without any stress and at a low sintering temperature. The grain sizes of both materials increased with an increase in sintering temperature. CONCLUSION The sintering temperature has significant effects on the microstructure and thus on the mechanical and optical properties of the evaluated zirconia.
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Affiliation(s)
- Julia Grambow
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Arnold-Heller-Straße 16, Kiel, D-24105, Germany.
| | - Sebastian Wille
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Arnold-Heller-Straße 16, Kiel, D-24105, Germany.
| | - Matthias Kern
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Arnold-Heller-Straße 16, Kiel, D-24105, Germany.
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de Paula Miranda RB, Leite TP, Pedroni ACF, Marques MM, de Lima NB, Marchi J, Cesar PF. Effect of titania addition and sintering temperature on the microstructure, optical, mechanical and biological properties of the Y-TZP/TiO 2 composite. Dent Mater 2020; 36:1418-1429. [PMID: 32958310 DOI: 10.1016/j.dental.2020.08.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 06/16/2020] [Accepted: 08/29/2020] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The aims of this study were: 1) to evaluate the effect of sintering temperature on microstructure, density and flexural strength of a 3Y-TZP/TiO2 composite containing 12.5 wt% of TiO2 compared to 3Y-TZP specimens (control); 2) to compare 3Y-TZP with the experimental 3Y-TZP/TiO2 composite, both sintered at 1400 °C, with respect to the following parameters: optical properties, characteristic strength, Weibull modulus, fatigue behavior, induction of osteoblasts proliferation and differentiation (mineralization nodules formation). METHODS The 3Y-TZP and 3Y-TZP/TiO2 powders were uniaxially pressed and sintered at 1200 °C, 1300 °C, 1400 °C or 1500 °C for one hour in a furnace. The microstructural analysis consisted of X-ray diffraction and scanning electron microscopy. The density was measured by the Archimedes' principle and the flexural strength was obtained by the biaxial flexure test. The optical properties were measured using a spectrophotometer operating in the visible light wavelength range. The step-stress accelerated life testing was performed by the pneumatic mechanical cycler and the biological behavior achieved by using osteoblast-like cells (Osteo-1 cell line). RESULTS Tetragonal zirconia was identified in all groups and cubic zirconia was identified only at 3Y-TZP group. The addition of TiO2 decreased the values of density and flexural strength of the composite 3Y-TZP/TiO2 in relation to 3Y-TZP regardless of the sintering temperature. The color difference between the two materials was not significant regarding L*a*b* parameters. The composite showed higher probability of failure, and induced higher proliferation and differentiation than control. SIGNIFICANCE The composite developed have good aesthetic and biologics properties. However, its microstructure and mechanical properties need to be improved for future dental implant applications.
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Affiliation(s)
| | - Tayná Paula Leite
- Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Ana Clara Fagundes Pedroni
- Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Márcia Martins Marques
- Programa de Pós-Graduação em Odontologia, Universidade Ibirapuera, São Paulo, SP, Brazil
| | - Nelson Batista de Lima
- Centro de Ciência e Tecnologia de Materiais, Instituto de Pesquisas Energéticas e Nucleares, São Paulo, SP, Brazil
| | - Juliana Marchi
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil
| | - Paulo Francisco Cesar
- Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, SP, Brazil.
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Du Z, Zhao Z, Liu H, Liu X, Zhang X, Huang Y, Leng H, Cai Q, Yang X. Macroporous scaffolds developed from CaSiO 3 nanofibers regulating bone regeneration via controlled calcination. Mater Sci Eng C Mater Biol Appl 2020; 113:111005. [PMID: 32487409 DOI: 10.1016/j.msec.2020.111005] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 03/18/2020] [Accepted: 04/20/2020] [Indexed: 01/31/2023]
Abstract
Calcium silicate (CS) is envisioned as a good substrate for bone tissue engineering applications because it can provide bioactive ions like Ca2+ and Si4+ to promote bone regeneration. Calcination temperature is a critical factor in determining the crystallinity of CS ceramic, which subsequently influences its degradation and ion release behaviors. To investigate the effect of calcination temperature on the capacity of CS in inducing bone regeneration, CS nanofibers were fabricated via electrospinning of precursor sol-gel and subsequent sintering at 800 °C, 1000 °C or 1200 °C. As the calcination temperature was increased, the obtained CS nanofibers displayed higher crystallinity and slower degradation rate. The CS nanofibers calcined at 800 °C (800 m) would like to cause high pH (>9) in cell culture medium due to its rapid ion release rate, displaying adverse effect on cell viability. Among all the preparations, it was found the CS nanofibers calcined at 1000 °C (1000 m) demonstrated the strongest promotion effect on the osteogenic differentiation of bone marrow mesenchymal stromal cells. To facilitate in vivo implantation, the CS nanofibers were shaped into three-dimensional macroporous scaffolds and coated with gelatin to improve their mechanical stability. By implanting the scaffolds into rat calvarial defects, it was confirmed the scaffold made of CS nanofibers calcined at 1000 °C was able to enhance new bone formation more efficiently than the scaffolds made of CS nanofibers calcined at 800 °C or 1200 °C. To summarize, calcination temperature could be an effective and useful tool applied to produce CS bioceramic substrates with improved potential in enhancing osteogenesis by regulating their degradation and bioactive ion release behaviors.
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Affiliation(s)
- Zhiyun Du
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Zhenda Zhao
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, PR China
| | - Huanhuan Liu
- Department of Endodontics, School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, PR China
| | - Xue Liu
- Department of Endodontics, School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, PR China
| | - Xu Zhang
- Department of Endodontics, School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, PR China
| | - Yiqian Huang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Huijie Leng
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, PR China.
| | - Qing Cai
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China.
| | - Xiaoping Yang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China
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Qi L, Xu J, Liu K. Porous sound-absorbing materials prepared from fly ash. Environ Sci Pollut Res Int 2019; 26:22264-22272. [PMID: 31152428 DOI: 10.1007/s11356-019-05573-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 05/24/2019] [Indexed: 06/09/2023]
Abstract
The use of modified fly ash for preparing porous sound-absorbing materials and the optimum conditions of fly ash modification were studied. The effects of sintering temperature, sintering time, forming pressure, and other experimental conditions on porous sound-absorbing materials were also investigated. Results showed that the average volume density of the finished product was 0.93 g/cm3, the compressive strength was approximately 1.2 MPa, and the average porosity was nearly 60%. The average sound absorption coefficient of the sample in a low-frequency band was approximately 0.353, and the overall average sound absorption coefficient was nearly 0.458. The optimal preparation conditions were as follows: sintering temperature was 1100 °C, sintering time was 5 h, and molding pressure was 2 MPa.
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Affiliation(s)
- Liqiang Qi
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, People's Republic of China.
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, People's Republic of China.
| | - Jun Xu
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, People's Republic of China
| | - Kunyang Liu
- Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, People's Republic of China
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Nie X, Chen Y, Mushtaq N, Rauf S, Wang B, Dong W, Wang X, Wang H, Zhu B. The sintering temperature effect on electrochemical properties of Ce 0.8Sm 0.05Ca 0.15O 2-δ (SCDC)-La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ (LSCF) heterostructure pellet. Nanoscale Res Lett 2019; 14:162. [PMID: 31089827 PMCID: PMC6517467 DOI: 10.1186/s11671-019-2979-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 04/10/2019] [Indexed: 05/06/2023]
Abstract
Recently, semiconductor-ionic materials (SIMs) have emerged as new functional materials, which possessed high ionic conductivity with successful applications as the electrolyte in advanced low-temperature solid oxide fuel cells (LT-SOFCs). In order to reveal the ion-conducting mechanism in SIM, a typical SIM pellet consisted of semiconductor La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) and ionic conductor Sm and Ca Co-doped ceria Ce0.8Sm0.05Ca0.15O2-δ (SCDC) are suffered from sintering at different temperatures. It has been found that the performance of LSCF-SCDC electrolyte fuel cell decreases with the sintering temperature, the cell assembled from LSCF-SCDC pellet sintered at 600 °C exhibits a peak power density (Pmax) of 543 mW/cm2 at 550 °C and also excellent performance of 312 mW/cm2 even at LT (500 °C). On the contrary, devices based on 1000 °C pellet presented a poor Pmax of 106 mW/cm2. The performance difference may result from the diverse ionic conductivity of SIM pellet through different temperatures sintering. The high-temperature sintering could severely destroy the interface between SCDC and LSCF, which provide fast transport pathways for oxygen ions conduction. Such phenomenon provides direct and strong evidence for the interfacial conduction in LSCF-SCDC SIMs.
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Affiliation(s)
- Xiyu Nie
- Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Science, Hubei University, Youyi Road 368, Wuhan, 430062 Hubei People’s Republic of China
| | - Ying Chen
- Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Science, Hubei University, Youyi Road 368, Wuhan, 430062 Hubei People’s Republic of China
| | - Naveed Mushtaq
- Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Science, Hubei University, Youyi Road 368, Wuhan, 430062 Hubei People’s Republic of China
| | - Sajid Rauf
- Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Science, Hubei University, Youyi Road 368, Wuhan, 430062 Hubei People’s Republic of China
| | - Baoyuan Wang
- Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Science, Hubei University, Youyi Road 368, Wuhan, 430062 Hubei People’s Republic of China
| | - Wenjing Dong
- Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Science, Hubei University, Youyi Road 368, Wuhan, 430062 Hubei People’s Republic of China
| | - Xunying Wang
- Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Science, Hubei University, Youyi Road 368, Wuhan, 430062 Hubei People’s Republic of China
| | - Hao Wang
- Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Science, Hubei University, Youyi Road 368, Wuhan, 430062 Hubei People’s Republic of China
| | - Bin Zhu
- Key Laboratory of Ferro and Piezoelectric Materials and Devices, Faculty of Physics and Electronic Science, Hubei University, Youyi Road 368, Wuhan, 430062 Hubei People’s Republic of China
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Eren Gültekin E. The effect of heating rate and sintering temperature on the elastic modulus of porcelain tiles. Ultrasonics 2018; 83:120-125. [PMID: 28610712 DOI: 10.1016/j.ultras.2017.06.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 04/01/2017] [Accepted: 06/01/2017] [Indexed: 06/07/2023]
Abstract
The scope of the present study is to investigate the change of elastic modulus with the physical and mechanical properties of porcelain tiles. In the study, porcelain tiles were sintered at different temperatures and at different heating rates to obtain minimum water absorption (%). After this, the time of flight of longitudinal and shear ultrasonic waves was measured through the tile. The time of flight of ultrasonic waves was measured using contact ultrasonic transducers operating on a pulse-echo mode. Using the time of flight of the ultrasonic waves and the thickness of the tiles, the velocity of the waves was determined. Using the ultrasonic velocities and bulk density, the elastic modulus of the tiles was determined. Helium pycnometry, a bend test, scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses were also carried out. The results show that the elastic modulus decreased with an increase of total porosity, but increased with bulk density and firing shrinkage. There is a polynomial relationship between elastic modulus and strength.
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Affiliation(s)
- Elif Eren Gültekin
- Nevşehir Hacı Bektaş Veli University, Fine Arts Faculty, Department of Ceramic and Glass, Prof. Dr. Rıza Ayhan Street, 50800 Hacibektas-Nevsehir, Turkey.
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Khoshzaban A, Rakhshan V, Najafi F, Aghajanpour L, Hashemian SJ, Keshel SH, Watanabe I, Valanezhad A, Jafarzadeh Kashi TS. Effect of sintering temperature rise from 870 to 920°C on physicomechanical and biological quality of nano-hydroxyapatite: An explorative multi-phase experimental in vitro/vivo study. Mater Sci Eng C Mater Biol Appl 2017; 77:142-150. [PMID: 28532015 DOI: 10.1016/j.msec.2017.03.183] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 01/04/2017] [Accepted: 03/21/2017] [Indexed: 12/31/2022]
Abstract
Hydroxyapatite (HA) is a proper scaffold for bone repair, however, it is not of excellent mechanical properties. Most previous studies on the effect of temperature increases were in vitro and had assessed merely improvements of HA's physicomechanical quality. This in vitro/vivo study investigated the effect of temperature increases from 870 to 920°C on physicomechanical and biological quality of Nano-HA. Forty experimentally produced HA disks sintered at 870 to 920°C were prepared (n=20×2). Disks were subjected to Vickers microindentation test (1 disk from each group divided into 4 quarters), Fourier transform infrared spectroscopy (1 disk), X-ray diffraction (XRD) [1 disk together with non-sintered HA], field emission scanning electron microscopy (FSEM, 1 disk from each group together with non-sintered HA), cell seeding and SEM assessment (2 disks), MTT assay over 4 different time periods (16 quadrants of 4 disks from each group), 6 one-thirds of 2 disks from each group for immunocytochemical (ICC) assay, and 8 disks from each group [as well as non-sintered HA] for the animal study (implantation in 4 sockets in 8 rabbits [32 specimens], histomorphometry, and computerized tomography) over two time periods. Quantitative data were analyzed statistically (α=0.05). Vickers microhardness increased from 63.7±11.9 in the 870 group to 153.4±104.7 in the 920 group (P=0.057). XRD indicated more regular crystal patterns in sintered groups compared to non-sintered nanoHA. FSEM showed larger crystals in the 920 group compared to 870 and non-sintered nanoHA. Expression of osteocalcin, osteonectin, and RUNX2 genes were more visible in ICC samples of the 920HA group. In MTT, cell numbers increased in all groups significantly (P=0.000), with no between-group differences (P>0.3). In rabbit experiments, the extent of 'newly formed bone' increased significantly over time (two-way ANOVA, P=0.000), reaching 39.5%, 46.4%, and 77.5% in the groups non-sintered HA, 870, and 920, respectively. The 920°C-sintered nanoHA induced the highest bone formation (P=0.000). Increasing the temperature of nanoHA sintering from 870 to 920°C can improve its physicomechanical properties and bone formation potential.
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Affiliation(s)
- Ahad Khoshzaban
- Dental Biomaterials Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran; Stem Cell Preparation Unit, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran; Iranian Tissue Bank and Research Center, Imam Khomeini Medical Complex Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Vahid Rakhshan
- Iranian Tissue Bank and Research Center, Imam Khomeini Medical Complex Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Farhood Najafi
- Department of Resin and Additives, Institute for Color Science and Technology, P.O. Box: 16765654, Tehran, Iran
| | - Leila Aghajanpour
- Stem Cell Preparation Unit, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed Jafar Hashemian
- Stem Cell Preparation Unit, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Saeed Heidari Keshel
- Stem Cell Preparation Unit, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | | | | | - Tahereh Sadat Jafarzadeh Kashi
- Dental Biomaterials Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran; Iranian Tissue Bank and Research Center, Imam Khomeini Medical Complex Hospital, Tehran University of Medical Sciences, Tehran, Iran.
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