Structure-polaronic conductivity relationship in vanadate-phosphate glasses

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Structure-polaronic conductivity relationship in vanadate-phosphate glasses
Original language description
This work provides new insights into the nature of the polaronic transport in xV2O5-(100-x)P2O5, 41 <= x <= 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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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