Effect of TeO2 Addition on the Mobility of Silver Ions in Ag2O-B2O3-P2O5-TeO2 glasses

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39901464" target="_blank" >RIV/00216275:25310/16:39901464 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.702.18" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/KEM.702.18</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.702.18" target="_blank" >10.4028/www.scientific.net/KEM.702.18</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of TeO2 Addition on the Mobility of Silver Ions in Ag2O-B2O3-P2O5-TeO2 glasses

Popis výsledku v původním jazyce

The effect of adding TeO2 into (100-x)[0.5Ag2OMINUS SIGN 0.1B2O3MINUS SIGN 0.4P2O5]MINUS SIGN xTeO2 glasses, with 0MINUS SIGN 80 mol% TeO2, on the structural changes and electrical properties has been investigated. The structure was studied by Raman spectroscopy and electrical properties have been studied over a wide temperature and frequency range by impedance spectroscopy. The addition of the third glass former, TeO2, to the glass network causes the structural transformation from TeO3 (tp) to TeO4 (tbp) which contributes to the changes in conductivity. The glasses with low TeO2 content show only a slow decrease in dc conductivity with addition of TeO2 due to the increase of the number of nonbridging oxygens, which increases the mobility of Ag+ ions. The steep decrease in conductivity for glasses containing more than 40 mol% TeO2 is a result of decrease of the Ag2O content and stronger cross-linkage in glass network through the formation of more Te-eqOax-Te bonds in TeO4 tbp units. The glasses obey scaling of the ac conductivity with respect to temperature indicating that the dynamic process is independent of temperature. However, the scaling of the spectra for different glasses revealed deviations from the Summerfield scaling due to the local structural disorder caused by structural transition in tellurite glass network.

Název v anglickém jazyce

Effect of TeO2 Addition on the Mobility of Silver Ions in Ag2O-B2O3-P2O5-TeO2 glasses

Popis výsledku anglicky

The effect of adding TeO2 into (100-x)[0.5Ag2OMINUS SIGN 0.1B2O3MINUS SIGN 0.4P2O5]MINUS SIGN xTeO2 glasses, with 0MINUS SIGN 80 mol% TeO2, on the structural changes and electrical properties has been investigated. The structure was studied by Raman spectroscopy and electrical properties have been studied over a wide temperature and frequency range by impedance spectroscopy. The addition of the third glass former, TeO2, to the glass network causes the structural transformation from TeO3 (tp) to TeO4 (tbp) which contributes to the changes in conductivity. The glasses with low TeO2 content show only a slow decrease in dc conductivity with addition of TeO2 due to the increase of the number of nonbridging oxygens, which increases the mobility of Ag+ ions. The steep decrease in conductivity for glasses containing more than 40 mol% TeO2 is a result of decrease of the Ag2O content and stronger cross-linkage in glass network through the formation of more Te-eqOax-Te bonds in TeO4 tbp units. The glasses obey scaling of the ac conductivity with respect to temperature indicating that the dynamic process is independent of temperature. However, the scaling of the spectra for different glasses revealed deviations from the Summerfield scaling due to the local structural disorder caused by structural transition in tellurite glass network.

Druh

D - Stať ve sborníku

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Key Engineering Materials

ISBN

978-3-0357-1048-9

ISSN

1013-9826

e-ISSN

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Počet stran výsledku

5

Strana od-do

18-22

Název nakladatele

Trans Tech Publications

Místo vydání

Zürich - Uetikon

Místo konání akce

Bangkok

Datum konání akce

20. 9. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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