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Titolo:
Oxide ion conducting glasses - Synthetic strategies based on liquid state and solid state routes
Autore:
Jacob, S; Javornizky, J; Wolf, GH; Angell, CA;
Indirizzi:
Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287 USA Arizona StateUniv Tempe AZ USA 85287 Chem & Biochem, Tempe, AZ 85287 USA
Titolo Testata:
INTERNATIONAL JOURNAL OF INORGANIC MATERIALS
fascicolo: 3, volume: 3, anno: 2001,
pagine: 241 - 251
SICI:
1466-6049(200106)3:3<241:OICG-S>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRESSURE-INDUCED AMORPHIZATION; PHASE-TRANSITIONS; AMORPHOUS SOLIDS; TEMPERATURE; RELAXATION; ZRW2O8; SYSTEM; MELTS;
Keywords:
glass; oxide ion conductor; pressure-induced amorphization; decoupling; high pressure;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Angell, CA Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287 USA Arizona State Univ Tempe AZ USA 85287 hem, Tempe, AZ 85287 USA
Citazione:
S. Jacob et al., "Oxide ion conducting glasses - Synthetic strategies based on liquid state and solid state routes", INT J INORG, 3(3), 2001, pp. 241-251

Abstract

We describe two different approaches to the formation of glasses in which the oxide ion has high mobility and which therefore may act as solid state anionic conductors. The first is a liquid state approach, utilizing the "barely stable compound" principle. The second avoids the liquid state completely by using the direct transformation of crystal to glass by pressure-induced amorphization. Both methods are applied to obtain glasses high in ZrO2 content. The glasses obtained have ionic conductivities that are as high asthose of pyrochlores, but fall short of those of stabilized zirconia, but may also have a high electronic conductivity depending on state of oxidation. The decoupling index, R-tau, at the glass transition temperature, which measures the freedom of mobile conducting species to move without coupling to their environment, is high, and is comparable to values for the best fluoride ion-conducting glasses. Prospects for broadening the range of oxide ion conducting glasses are considered. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 04/04/20 alle ore 02:34:26