Structure-polaronic conductivity relationship in vanadate-phosphate glasses

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F24%3A39921854" target="_blank" >RIV/00216275:25310/24:39921854 - isvavai.cz</a>

Výsledek na webu

<a href="https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.19911" target="_blank" >https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.19911</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jace.19911" target="_blank" >10.1111/jace.19911</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structure-polaronic conductivity relationship in vanadate-phosphate glasses

Popis výsledku v původním jazyce

This work provides new insights into the nature of the polaronic transport in xV2O5-(100-x)P2O5, 41 &lt;= x &lt;= 89 mol% glasses from analysis of their conductivity over a wide range of frequencies and temperatures, and correlation of the electrical parameters to the structural models of these materials. The results show that the linear increase in direct current (DC) conductivity with the increase in V2O5 could be related to the formation of a vanadate subnetwork, which is characterized by a length distribution of V-O bonds and variations in linkages between different vanadate units. Such a structurally complex network offers multiple conduction pathways which are favorable for polaron hopping. The Summerfield scaling of conductivity spectra reveals a temperature-invariant mechanism of polaron transport for all glasses and the same local structural environment of polarons at higher V2O5 contents due to the same ratio of vanadate units present in the network. Also, this study highlights the similarities and differences in the nature of the polaronic transport of vanadate-phosphate glasses and other polaronically conducting phosphate glasses containing WO3, MoO3, and Fe2O3, and pins down a pivotal role of the glass structure in electrical processes in these materials.

Název v anglickém jazyce

Structure-polaronic conductivity relationship in vanadate-phosphate glasses

Popis výsledku anglicky

This work provides new insights into the nature of the polaronic transport in xV2O5-(100-x)P2O5, 41 &lt;= x &lt;= 89 mol% glasses from analysis of their conductivity over a wide range of frequencies and temperatures, and correlation of the electrical parameters to the structural models of these materials. The results show that the linear increase in direct current (DC) conductivity with the increase in V2O5 could be related to the formation of a vanadate subnetwork, which is characterized by a length distribution of V-O bonds and variations in linkages between different vanadate units. Such a structurally complex network offers multiple conduction pathways which are favorable for polaron hopping. The Summerfield scaling of conductivity spectra reveals a temperature-invariant mechanism of polaron transport for all glasses and the same local structural environment of polarons at higher V2O5 contents due to the same ratio of vanadate units present in the network. Also, this study highlights the similarities and differences in the nature of the polaronic transport of vanadate-phosphate glasses and other polaronically conducting phosphate glasses containing WO3, MoO3, and Fe2O3, and pins down a pivotal role of the glass structure in electrical processes in these materials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of the American Ceramic Society

ISSN

0002-7820

e-ISSN

1551-2916

Svazek periodika

107

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

5866-5880

Kód UT WoS článku

001230595500001

EID výsledku v databázi Scopus

2-s2.0-85194277433