Improvement of Electrical Conductivity and Chemical Durability in Fe₂O₃ Doped V₂O5-B₂O₃-P₂O5 Glasses

Jaemin Cha; Hwajin Jeong; Bongki Ryu

doi:10.1166/jnn.2019.16217

Improvement of Electrical Conductivity and Chemical Durability in Fe₂O₃ Doped V₂O₅-B₂O₃-P₂O₅ Glasses

J Nanosci Nanotechnol. 2019 Mar 1;19(3):1254-1260. doi: 10.1166/jnn.2019.16217.

Authors

Jaemin Cha¹, Hwajin Jeong², Bongki Ryu²

Affiliations

¹ The Institute of Materials Technology, Pusan National University, Busan, 46241, Korea.
² Department of Materials Science and Engineering, Pusan National University, Busan, 46241, Korea.

PMID: 30469172
DOI: 10.1166/jnn.2019.16217

Abstract

In this study, we verified the relationship among the electrical conductivity, chemical durability, and structure of conductive vanadate glass in which Fe²⁺-Fe³⁺ and V⁴⁺-V⁵⁺ systems simultaneously coexist. We prepared samples of iron vanadium borophosphate glass with various compositions given by 78V₂O₅-15P₂O₅-7B₂O₃-xFe₂O₃ (1, 5, 7.5 and 10 mol%) and analyzed the electrical conductivity, chemical durability, FTIR spectra, thermal properties, density, and molar volume. The results indicated that the addition of Fe₂O₃ improved the electrical conductivity, chemical durability, and thermal properties. The following conclusions could be drawn: Fe²⁺-O-P bonds or Fe³⁺-O-P bonds were generated in the glass structure, and Fe³⁺ and Fe²⁺ ions were located at tetrahedral and octahedral sites. Furthermore, V═O bonds were expected to be replaced with Fe-O-V and P-O-V bonds, which are stronger than double bonds, so that the complete glass structure was strong. The structural reinforcement of the glasses was additionally confirmed based on thermal and chemical properties and electrical conductivity.