Evolution of pressure-amorphized zirconium tungstate upon annealing

9Citations
Citations of this article
6Readers
Mendeley users who have this article in their library.
Get full text

Abstract

Zirconium tungstate Zr(WO4)2 exhibits irreversible amorphization at high pressure. Upon heating, the pressure-amorphized phase transforms into different phase/phases depending on the pressure applied during heating. Transformation of pressure-amorphized samples to metastable cubic phase during isochronal annealing at ambient pressure is investigated using X-ray diffraction and Raman spectroscopy. Though the X-ray diffraction and Raman spectra show only monotonic changes up to 850 K in the amorphous state, the sample exhibits dramatic changes in the color from gray to black to white. The relaxation of the amorphous phase during annealing suggests gradual irreversible volume increase by about 6%, whereas the tungstate tetrahedra are found to shrink. Crystallization to cubic phase at 900 K is accompanied by a large increase in the sample volume. The specific volumes of the amorphous phases obtained from cycling the samples to different pressures suggest the possibility of polyamorphism in this system. © 2009 Elsevier B.V. All rights reserved.

Cite

CITATION STYLE

APA

Ravindran, T. R., Arora, A. K., Sastry, V. S., & Sahu, P. C. (2009). Evolution of pressure-amorphized zirconium tungstate upon annealing. Journal of Non-Crystalline Solids, 355(45–47), 2289–2294. https://doi.org/10.1016/j.jnoncrysol.2009.07.019

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free