New Kind of Solid Lubricant and Oil Additive-Preparation of Oxythiomolybdate and Investigation of the Tribological Property

The process of chemical synthesis of a new kind of solid lubricant and oil additive- nickel oxythiomolybdate and one of its precursor material ammonium oxythiomolybdate were studied. Their composition, structure and morphology were investigated by chemical analysis, X-ray diffraction, electron microprobe and SEM. The results obtained show that their optimum parameters for synthesizing are: pH=4~5, T=30℃, and pH=7~9, T=-5~0℃. NiMoO2S2 as a solid lubricant and an oil additive from 20℃ to 600℃ has good tribological behaviors, and can be regarded as a new kind of lubricant applied in a wide temperature range.