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２ Ｈ 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１ ５００ ℃。
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 WS 2 micro powder is (7.72±0.02)×10 3 kg/m 3, the ratio of S/W is 2.1; the valence of S is -2,W is +4;the crystal structure of WS 2 micro powder is 2H type;the thermal stability of WS 2 in open air varied with its preparing temperature, the initial oxidizing temperature of WS 2 prepared at 450 ℃ is 246 ℃, while that of prepared at 1 400℃is 570 ℃; the initial reducing temperature of WS 2 in hydrogen gas prepared at 1 300℃ is 660 ℃, the maximum thermal stable temperature of that in nitrogen gas is 1 500 ℃.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
1999年第4期811-814,共4页
The Chinese Journal of Nonferrous Metals
关键词
微粉
物理性能
热稳定性
硫化钨
high purity WS 2
physical properties
thermal stability
