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二硫化钨

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二硫化钨
IUPAC名
Tungsten disulfide
Bis(sulfanylidene)tungsten
系统名
Dithioxotungsten
识别
CAS号 12138-09-9  ✓
PubChem 82938
ChemSpider 74837
SMILES
InChI
InChIKey ITRNXVSDJBHYNJ-UHFFFAOYSA-N
EINECS 235-243-3
ChEBI 30521
性质
化学式 WS2
摩尔质量 247.98 g/mol g·mol⁻¹
外观 蓝灰色粉末[1]
密度 7.5 g/cm3 固态[1]
熔点 1250 °C 分解[1]
溶解性 微溶
结构
晶体结构 辉钼矿结构
配位几何 三棱柱 (WIV)
锥形 (S2−)
危险性
警示术语 R:R36/37/38
安全术语 S:S26-S37/39
欧盟编号 未列出
欧盟分类
刺激性
刺激性 Xi
相关物质
其他阴离子 二氧化钨
二硒化钨
其他阳离子 二硫化钼
若非注明,所有数据均出自一般条件(25 ℃,100 kPa)下。

二硫化钨是一种无机化合物,化学式为WS2

性质

灰色有金属光泽的细小六方晶系结晶或粉末。在空气中稳定。不溶于水,溶于硝酸氢氟酸混酸中。溶于熔融碱,不溶于

制备

钨酸铵与硫化氢气体反应,沉淀出四硫代钨酸铵。后者再经高温焙烧,分解为二硫化钨。

用途

二硫化钨是一种新型的固体润滑剂,适用于高温、高压、高负荷和高真空条件下的润滑。可添加在工程塑料中制成自润滑元件,也可与挥发性溶剂混合,喷涂于金属表面,在冲锻中用来提高模具寿命和工件的光洁度。

参考资料

  1. ^ 1.0 1.1 1.2 Mary Eagleson. Concise encyclopedia chemistry. Walter de Gruyter. 1994: 1129 [6 November 2011]. ISBN 978-3-11-011451-5. (原始内容存档于2017-03-27). 
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二硫化钨
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