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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/GA18-01976S" target="_blank" >GA18-01976S: Nová perspektivní skla a skokeramické materiály na bázi fosforečnanů a borofosforečnanů</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Electrochimica Acta

ISSN

0013-4686

e-ISSN

—

Svazek periodika

276

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

434-445

Kód UT WoS článku

000433042500047

EID výsledku v databázi Scopus

2-s2.0-85046276423