Nature of mixed electrical transport in Ag2O-ZnO-P2O5 glasses containing WO3 and MoO3

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39912726" target="_blank" >RIV/00216275:25310/18:39912726 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.electacta.2018.04.029" target="_blank" >http://dx.doi.org/10.1016/j.electacta.2018.04.029</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2018.04.029" target="_blank" >10.1016/j.electacta.2018.04.029</a>

Result language

angličtina

Original language name

Nature of mixed electrical transport in Ag2O-ZnO-P2O5 glasses containing WO3 and MoO3

Original language description

This study reports on the nature of electrical transport and role of structural changes induced by different type and content of TMO in Ag-containing glasses of xTMO (30-0.5x)Ag2O-(30-0.5x)ZnO-40P(2)O(5) (TMO = MoO3/WO3, 0 &lt;= x &lt;= 60 mol%) composition. Raman spectra show clustering of WO6 units in glasses with high WO3 content while the addition of MoO3 induces a gradual change of MoO6 octahedra to MoO4 tetrahedra both being cross-linked with phosphate units without clustering. For WO3 glasses, minimum in DC conductivity is observed at 30-40 mol% of WO3 for temperatures from 303 to 513 K, followed by an increase in conductivity with further WO3 addition due to an increase in polaronic contribution. Observed turnover suggests a distinct transition from predominantly ionic to predominantly polaronic transport. On the contrary, for MoO3 glasses, conductivity decreases in the whole mixed compositional range indicating that the nature of transport is dominated by ionic component throughout the measured temperature range. A comparative study of Ag+, Li+, Na+ transport in MoO3/WO3 glasses reveals a strong correlation between pre-exponential factor and activation energy, which allows detection of the prevalence of conduction mechanism. Finally, the results demonstrate that Ag2O-WO3-ZnO-P2O6 glass system is a promising electrically tunable material with significant contributions of ionic or polaronic conductivity depending on composition.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

<a href="/en/project/GA18-01976S" target="_blank" >GA18-01976S: New prospective phosphate and borophosphate glasses and glass-ceramics</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

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

Name of the periodical

Electrochimica Acta

ISSN

0013-4686

e-ISSN

—

Volume of the periodical

276

Issue of the periodical within the volume

June

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

434-445

UT code for WoS article

000433042500047

EID of the result in the Scopus database

2-s2.0-85046276423