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Nakano H. Unique crystal structures and their applications as materials for Li1+-M1--3Ti+4O3 (M = Nb or Ta, 0.07 ≤ x ≤ 0.33, 0 ≤ y ≤ 0.175). ADV POWDER TECHNOL 2019. [DOI: 10.1016/j.apt.2019.04.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Rapid Sintering of Li₂O-Nb₂O₅-TiO₂ Solid Solution by Air Pressure Control and Clarification of Its Mechanism. MATERIALS 2018; 11:ma11060987. [PMID: 29891803 PMCID: PMC6025438 DOI: 10.3390/ma11060987] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 05/25/2018] [Accepted: 06/09/2018] [Indexed: 11/17/2022]
Abstract
We first successfully synthesized Li1+x−yNb1−x−3yTix+4yO3 (LNT) solid solutions (0.13 ≤ x ≤ 0.18, 0 ≤ y ≤ 0.06) rapidly at 1373 K for one hour under 0.35 MPa by the controlling of air pressure using an air-pressure control atmosphere furnace. The composition is a formation area of a superstructure for LNT, in which the periodical intergrowth layer was formed in the matrix, and where it can be controlled by Ti content. Therefore, the sintering time depended on Ti content, and annealing was repeated for over 24 h until a homogeneous structure was formed using a conventional electric furnace. We clarified the mechanism of the rapid sintering using various microscale to nanoscale characterization techniques: X-ray diffraction, a scanning electron microscope, a transmission electron microscope (TEM), a Cs-corrected scanning TEM equipped with electron energy-loss spectroscopy, and X-ray absorption fine structure spectroscopy.
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Nakano H, Furuya S, Yuasa M, Suzuki TS, Ohsato H. Fabrication and anisotropic electronic property for oriented Li1+−Nb1−−3Ti+4O3 solid solution by slip casting in a high magnetic field. ADV POWDER TECHNOL 2017. [DOI: 10.1016/j.apt.2017.06.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Nakano H, Suehiro S, Furuya S, Hayashi H, Fujihara S. Synthesis of New RE 3+ Doped Li 1+xTa 1-xTi xO₃ (RE: Eu, Sm, Er, Tm, and Dy) Phosphors with Various Emission Colors. MATERIALS (BASEL, SWITZERLAND) 2013; 6:2768-2776. [PMID: 28811407 PMCID: PMC5521230 DOI: 10.3390/ma6072768] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 05/05/2013] [Accepted: 06/08/2013] [Indexed: 11/28/2022]
Abstract
New phosphors with various emission colors for RE3+ doped Li1+xTa1-xTixO₃ (LTT) (RE: Eu, Sm, Er, Tm, and Dy) were synthesized by electric furnace at 1423 K for 15 h. The microstructure of the host material and the photoluminescence (PL) property were determined and compared to those of RE3+ doped Li1+xNb1-xTixO₃ (LNT). In the LTT phosphor, the highest PL intensity was achieved for the mixture composition Li1.11Ta0.89Ti0.11O₃ with a LiTaO₃ structure, although it has an M-phase superstructure. In the LTT host material, the effective activators were Eu3+ and Sm3+ ions, in contrast to the LNT host material. Here, we discuss the relationship between PL property and the host material's structure.
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Affiliation(s)
- Hiromi Nakano
- Toyohashi University of Technology, Tempaku, Toyohashi 441-8580, Japan.
| | - Shiho Suehiro
- Toyohashi University of Technology, Tempaku, Toyohashi 441-8580, Japan.
| | - Shohei Furuya
- Toyohashi University of Technology, Tempaku, Toyohashi 441-8580, Japan.
| | - Hiroyuki Hayashi
- KRI, Inc., Chudoji Minami-machi, Shimogyo-ku, Kyoto 600-8813, Japan.
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Yang T, Abakumov AM, Hadermann J, Van Tendeloo G, Nowik I, Stephens PW, Hemberger J, Tsirlin AA, Ramanujachary KV, Lofland S, Croft M, Ignatov A, Sun J, Greenblatt M. BiMnFe2O6, a polysynthetically twinned hcp MO structure. Chem Sci 2010. [DOI: 10.1039/c0sc00348d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Raczkowska J, Bernasik A, Budkowski A, Rysz J, Gao B, Lieberman M. Compositional Mismatch between Chemical Patterns on a Substrate and Polymer Blends Yielding Spin-Cast Films with Subpattern Periodicity. Macromolecules 2007. [DOI: 10.1021/ma062614f] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Raczkowska
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - A. Bernasik
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - A. Budkowski
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - J. Rysz
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - B. Gao
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - M. Lieberman
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
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