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황용길 ( Yong Kil Hwang ),성장현 ( Jang Hyun Sung ),정중희 ( Jyoung Hee Jung ),이상화 ( Sang Hwa Lee ) 東亞大學校附設 石堂傳統文化硏究院 1979 石堂論叢 Vol.3 No.-
For the purpose of puroducing synthetic molybdenum disulphide and investigating the mechanism by which the synthetic molybdenum disulphide formed, the sodium molybdate and sulphur with a given ratio were sufficiently mixed and reacted at a given temperature. The thermal analysis for various samples and the structual analysis of molybdenum disulphide were performed by means of thermal balance and X-ray diffractor-meter. From the above experiments, the following results could be drawn. 1) The suitable reaction temperature for the production of the synthetic molybdenum disulphide with sodium molybdate and sulphur was found to be in the range 500° to 600℃. 2) The recovery of the synthetic molybdenum disulphide was decreased by increasing the mixing ratio of sulphur to sodium molybdate and the highest value for the yield of molybdenum disulphide was obtained when the theoretical value for the mixing ratio of sulphur to sodium molybdate was used. 3) The particle size of molybdenum, disulphide thus produced was shown to be -325 mesh. It was also shown that the roasting temperature range of naturally formed molybdenite was 400° to 600℃, while the roasting temperature range of synthetic molybdenum disulphide was 300° to 500℃. 4) The X-ray diffraction analysis showed that the crystal structure of naturally formed molybdenite and the synthetic molybdenum disulphide were hexagonal and rombohedral lattice, respectively.
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