(1. 东北大学材料与冶金学院, 沈阳 110006；
2. 锦州铁合金集团股份有限公司, 锦州 121005; 3. 沈阳冶炼厂, 沈阳 110025)
摘 要: 采用SEM，XRD，DTA，XPS等手段，测定了高纯WS2微粉的密度、组成与价态、结构、摩擦磨损性能等物理性质，研究了高纯WS2微粉分别在空气、氢气和氮气中的热稳定性。实验结果表明：WS2的平均密度为(7.72±0.02)×103 kg/m3；S/W比值约为2.1，S为-2价，W为+4价；WS2微粉晶体为2H结构；WS2在空气中的热稳定性随着制备温度的升高而变好，450 ℃下制备的WS2起始氧化温度为246℃, 1400℃下制备的WS2起始氧化温度为570℃；1300℃下制备的WS2在氢气中的还原反应起始温度为660 ℃；在密闭氮气中的最高热稳定温度为1500℃。
关键字: WS2微粉；物理性能；热稳定性
（1. School of Materials and Metallurgy, Northeastern University, Shenyang 110006, P.R.China
2. Jinzhou Ferrous Alloy Ltd. Co., Jinzhou 121005, P. R. China
3. Shenyang Smelter, Shenyang 110025, P. R. China）
Abstract:The physical properties of high purity tungsten disulfide micro powder, including its density, composition, valence, crystal structure, friction and wear properties, were investigated by DTA, XRD, SEM and XPS. The thermal stability of high purity tungsten disulfide in air, hydrogen and nitrogen was also studied. The results showed that the average density of WS2 micro powder is (7.72±0.02)×103 kg/m3, the ratio of S/W is 2.1; the valence of S is -2, W is +4 ; the crystal structure of WS2 micro powder is 2H type; the thermal stability of WS2 in open air varied with its preparing temperature, the initial oxidizing temperature of WS2 prepared at 450℃ is 246℃, while that of prepared at 1400℃ is 570℃; the initial reducing temperature of WS2 in hydrogen gas prepared at 1300℃ is 660℃, the maximu, m thermal stable temperature of that in nitrogen gas is 1500 ℃.
Key words: high purity WS2; physical properties; thermal stability
