|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Materials Processing Fundamentals
||Experimental Phase Diagram Study in CaO-MgO-V2O5 System
||Guishang Pei, Lilian Yang, Dapeng Zhong, Junyi Xiang, Xuewei Lv
|On-Site Speaker (Planned)
The phase equilibria of the CaO–MgO–V2O5 at 773 K in air was constructed. For this study, numerous samples of various nominal compositions were prepared by a conventional solid state reaction. Two type solid-solutions of CaxMg1-x(VO3)2 (0≤x≤0.4) and CaxMg1-x(VO3)2 (0.4≤x≤1) were detected and verified in MgV2O6–CaV2O6 isopleths. The composition content of Ca2+=0.4 were intended to be the phase boundary of two kinds component-derived solid solutions. Only one stoichiometric compounds CaMgV2O7 was confirmed in the Mg2V2O7–Ca2V2O7 isopleths. In the isopleths of the Mg3V2O8–Ca3V2O8, one was a ternary CaxMg1-x(VO3)2 (0≤x≤0.4)–type solid solutions was detected. New experimental results in this work will serve as reliable input for future thermodynamic reassessments of the CaO-MgO-V2O5 ternary system within the CALPHAD-type framework, and expect to further improve the current V2O5-based multi-phase thermodynamic databases.
||Ceramics, Characterization, Phase Transformations