Structure–polaronic conductivity relationship in vanadate–phosphate glasses

Razum, Marta; Pavić, Luka; Pajić, Damir; Pisk, Jana; Mošner, Petr; Koudelka, Ladislav; Šantić, Ana (2024) Structure–polaronic conductivity relationship in vanadate–phosphate glasses. Journal of the American Ceramic Society, 107 (9). pp. 5866-5880. ISSN 1551-2916

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Abstract

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 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.

Item Type:	Article
Additional Information:	[Data set]. Šantić, Ana. 2025. The experimental data for "Structure–polaronic conductivity relationship in vanadate–phosphate glasses". Institut Ruđer Bošković. https://urn.nsk.hr/urn:nbn:hr:241:336942
Uncontrolled Keywords:	glass structure; phosphate glasses; polaronic conductivity
Subjects:	NATURAL SCIENCES > Chemistry
Divisions:	Division of Materials Chemistry
Projects:	Project title Project leader Project code Project type Detaljan uvid u mehanizme polaronske i ionske vodljivosti u oksidnoj staklo-(keramici)-POLAR-ION-GLASS Ana Šantić IP-2018-01-5425 HRZZ Centar izvrsnosti u kemiji Josip Požar KK.01.1.1.02.0016 Infrastrukturni projekt Centar za Napredna Istraživanja Kompleksnih Sustava Mihael S. Grbić KK.01.1.1.02.0013 Infrastrukturni projekt
Depositing User:	Ana Šantić
Date Deposited:	28 Jan 2025 11:44
URI:	http://fulir.irb.hr/id/eprint/9512
DOI:	10.1111/jace.19911

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