Direct correlation between nonrandom ion hopping and network structure in ion-conducting borophosphate glasses.
PHYSICAL REVIEW LETTERS 2008;
100:035901. [PMID:
18233003 DOI:
10.1103/physrevlett.100.035901]
[Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2007] [Revised: 07/06/2007] [Indexed: 05/25/2023]
Abstract
We present temperature-dependent conductivity spectra of sodium borophosphate glasses with a varying borate/phosphate ratio but a constant sodium oxide content which can be mapped into time-dependent mean square displacements. For the first time, we show that characteristic lengths of ion transport derived thereof are directly linked to features of network structure, viz., the number of boron oxide tetrahedra. Our results also shed light on the mixed network former effect.
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