Structural changes in hexagonal WO3 under high pressure

doi:10.1016/j.jallcom.2019.05.132

2019-08-01

PRE

DOI：10.1016/j.jallcom.2019.05.132

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摘要

En 中文

The high pressure of hexagonal-tungsten oxide (h-WO3) has been studied in diamond anvil cell up to 50 GPa at room temperature by angle-dispersive X-ray powder diffraction (AD-XRD). Cell refinement, FWHM and area of peaks and microstructure were analyzed. Results show that below 10 GPa, lattice strains follow linear trend, with bulk modulus B-0 = 42(2) GPa, and its pressure derivative B-0' = 13(2), and the crystalline grain sizes rapidly decrease in this range. In the range of 10-36 GPa, the lattice strains deviate linear trend, with decreasing amount of crystalline regions, and r.m.s. microstrain dominates this range. After 36 GPa, the lattice strain show a little increase, implying the crystalline-amorphous transformation occurs. (C) 2019 Elsevier B.V. All rights reserved.

Keyword:

High pressure

Tungsten oxide

Amorphization

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期刊

Journal of Alloys and Compounds

IF:

6.3

论文数:

8.4W

被引数:

24.3W

机构

institute of high energy physics, cas

学者数:

4.9K

论文数: 4.8K

被引数: 7

chinese academy of sciences

学者数:

56.7W

论文数: 45.0W

被引数: 704

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