Low-compressibility of tungsten tetraboride: a high pressure X-ray diffraction study

被引：41

作者：

Liu, Chenji ^{[1
]}

Peng, Fang ^{[1
]}

Tan, Ning ^{[1
]}

Liu, Jing ^{[2
]}

Li, Fengjiao ^{[1
]}

Qin, Jiaqian ^{[1
,3
]}

Wang, Jianghua ^{[1
]}

Wang, Qiming ^{[1
]}

He, Duanwei ^{[1
]}

机构：

[1] Sichuan Univ, Inst Atom & Mol Phys, Chengdu 610065, Peoples R China

[2] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[3] Ehime Univ, Geodynam Res Ctr, Matsuyama, Ehime 7908577, Japan

来源：

HIGH PRESSURE RESEARCH | 2011年 / 31卷 / 02期

基金：

中国国家自然科学基金;

关键词：

tungsten tetraboride; equation of state; low-compressibility; synchrotron X-ray diffraction; SUPERHARD RHENIUM DIBORIDE; OSMIUM DIBORIDE; SILICONE FLUID; DIAMOND;

D O I：

10.1080/08957959.2011.582871

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Diamond anvil cell synchrotron X-ray diffraction (XRD) experiments have been carried out on submicron-sized tungsten tetraboride (WB4) at room temperature up to 50.8GPa with a silicone oil pressure medium. The crystal structure of WB4 remains unchanged up to the highest pressure. The isothermal bulk modulus K0 and its pressure derivative, [image omitted], have been determined from the present compression by fitting the third-order Birch-Murnaghan equation of state: K0=325 +/- 9GPa and [image omitted]. The high value of the bulk modulus shows that WB4 has high stiffness and/or low-compressibility. Moreover, we also found that the compression behavior of the unit cell axes (a- and c-axes) of WB4 demonstrates an anisotropic nature of compressibility.

引用

页码：275 / 282

页数：8

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