AUTHOR=McDonald Lisa , Siligardi Cristina , Vacchi Marco , Zieser Adam , Affatigato Mario 

TITLE=Tellurium Vanadate Glasses: V4+colorimetric Measure and Its Effect on Conductivity

JOURNAL=Frontiers in Materials

VOLUME=7

YEAR=2020

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2020.00103

DOI=10.3389/fmats.2020.00103

ISSN=2296-8016

ABSTRACT=<p>This research comes as part of a broader resurgence of study on the electrical conductivity of glasses—and the mechanism for electronic motion in the amorphous network—spurred by interest in using glasses as matrices for solid-state batteries, taking advantage of the glasses’ tailorable conductivity, chemical durability, and mechanical strength. The work presented in this study regards the preparation and characterization of some binary glasses belonging to the TeO<sub>2</sub>–V<sub>2</sub>O<sub>5</sub> system. In particular, we focused on the glasses’ electrical conductivity at room temperature and at higher temperatures as a function of the V<sup>4+</sup> ion content in the glass structure. The amount of V<sup>4+</sup> in the glass was determined by a colorimetric method. Moreover, density and thermal properties (<italic>T</italic><sub><italic>g</italic></sub>, <italic>C</italic><sub><italic>p</italic></sub>) were measured, and scanning electron microscopy (SEM) and X-ray diffraction (XRD) measurements were performed as well.</p>