Method of manufacturing silicon sulfide

Details Method of manufacturing silicon sulfide Method of manufacturing silicon sulfide

1997-04-15

1998-12-01

Nguyen, Ngoc-Yen

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

423324, 423565, 423DIG12, C01B 3300, C01B 1700

Patent

active

058433910

ABSTRACT:
Silicon sulfide is manufactured from the fine powder of silicon having a particle size in the range of 60 to 100.mu., covered thoroughly with sulfur at lower temperature less than 700.degree. C. in vacuum. In order to produce the silicon sulfide, silicon should be ground in a non-oxidizing atmosphere to prevent the formation of a silicon oxide layer that remains in the product and degrades the purity of the product. The silicon powder is dispersed sufficiently in the molten sulfur. At this time, the quantity of added sulfur needs more than 1.1 times in comparison with the stoichiometric quantity of silicon sulfide. All surfaces of silicon powder should be covered with sulfur to avoid sintering between silicon particles in the whole process of the reaction.

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