Structure and properties of cerium phosphate and silicophosphate glasses
Xia Y, Calahoo C, Rodrigues BP, Griebenow K, Graewe L, Wondraczek L (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 106
Pages Range: 2808-2819
Journal Issue: 5
DOI: 10.1111/jace.18936
Abstract
We report on the fabrication, properties, and structure of cerium pyrophosphate glasses and partially substituted cerium silicophosphates. In those glasses, cerium occurs predominantly as Ce(III). A combination of dynamic nuclear magnetic resonance and electrical impedance spectroscopy is used to overcome the problem of assessing cerium speciation. While optical spectroscopy is unable to quantify the ratio of Ce(III)/Ce(IV) due to spectral overlap, proxy observations of the effect of silica-for-cerium substitution on optical extinction and the shape and width of the UV band gap corroborate vibrational spectroscopic data of the structural roles of cerium and silica. While silica bonding to phosphate units appears to stabilize Ce(IV), it also impedes the polaron transport, leading to higher polaron activation energy and lower electronic conductivity. On the other hand, Ce(III) is stabilized by coordinating to P = O.
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Germany (DE)How to cite
APA:
Xia, Y., Calahoo, C., Rodrigues, B.P., Griebenow, K., Graewe, L., & Wondraczek, L. (2023). Structure and properties of cerium phosphate and silicophosphate glasses. Journal of the American Ceramic Society, 106(5), 2808-2819. https://doi.org/10.1111/jace.18936
MLA:
Xia, Yang, et al. "Structure and properties of cerium phosphate and silicophosphate glasses." Journal of the American Ceramic Society 106.5 (2023): 2808-2819.
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