Phase equilibrium studies in V ₂ O ₅ ‐Fe ₂ O ₃ and V ₂ O ₅ ‐TiO ₂ systems

Abstract

Abstract V 2 O 5 ‐Fe 2 O 3 and V 2 O 5 ‐TiO 2 systems represent two important chemical systems with various applications, including energy, catalysts, and high‐performance materials. In the present study, high‐temperature phase equilibrium experiments were conducted at the temperature range of 670–1000°C in air. Electron probe X‐ray micro‐analyzer (EPMA) was used to analyze the microstructure and composition of the phases presented in quenched samples. Systematic experiments demonstrated that V 2 O 5 ‐containing systems should not be quenched by water‐based quenching media. Phase diagrams in both systems were constructed, and the eutectic and peritectic points of the systems were confirmed and compared with previous studies. The present study improved the previous results and could be used as the base for thermodynamic modelings and further applications of the two systems.