Phase relations in the "FeO-V2O3" system at 1473 K and the magnetic properties of spinel phase Fe3-xVxO4

被引：6

作者：

Yan, Baijun ^{[1
]}

Wang, Daya ^{[1
]}

Qiu, Qiugen ^{[1
]}

Deng, Tengfei ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Dept Phys Chem Met, Beijing 100083, Peoples R China

[2] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 05期

基金：

中国国家自然科学基金;

关键词：

FeO-V2O3" system; Phase diagram; Spinel oxide; Magnetic properties; CATHODE MATERIAL; VANADIUM; EQUILIBRIA; REDUCTION; EVOLUTION; FEVO4;

D O I：

10.1016/j.ceramint.2019.11.082

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Phase relations within the "FeO-V2O3" oxide system at 1473 K in the oxygen partial pressure range from 5.98 x 10(-15) to 2.39 x 10(-8) atm were determined using the chemical equilibrium and quench method followed by XRD and EPMA measurements. There exist four univariant equilibria and two invariant equilibria in the "FeO-V2O3" oxide system. According to the determined phase relations, a phase diagram of this system was constructed by plotting log(p(O2)/atm) versus the molar ratio of V/(Fe + V). Furthermore, the magnetic properties of a series of spinel Fe3-xVxO4 compounds prepared under different oxygen partial pressures were measured at room temperature. It was revealed that Fe3-xVxO4 compounds with Fe/V larger than 1.2 are magnetic, and their magnetizations increase remarkably with the increasing of the molar ratio of Fe/V. In addition, for the Fe(3-x)V(x)O(4 )compound with fixed molar ratio of Fe/V, its saturation magnetization increases slightly with the increasing of the oxygen partial pressure in which the compound was prepared.

引用

页码：6160 / 6167

页数：8

共 22 条

[1] FactSage thermochemical software and databases, 2010-2016 [J].