Crystallization of Rapidly-Quenched Amorphous Vanadium(V) Oxide Prepared by the Single-Roller Method

Abstract

Crystallization and stability of title vanadium(V) oxide (V₂0₅) have been studied as a function of temperature and time. Heat treatment temperatures were 150, 160, 170, and 180°C. Crystallinity was obtained by X-ray analysis and the results are displayed as timetemperaturetransformation (T-T-T) diagrams. The times required for initiation and completion of crystallization were as follows. Existence of an unidentified crystalline phase in an early stage ol crystallization was detected by X-ray analysis.