METHOD OF PRODUCTION OF RARE-EARTH ELEMENT FLUOROSULPHIDE POWDERS

摘要

FIELD: process engineering.SUBSTANCE: invention relates to inorganic chemistry, particularly to production of powders to be used in laser technology and optical instrument making. Proposed method comprises preparation of blend and its thermal treatment. Said blend is prepared from the powder of sesquialteral rare-earth element sulphides with particle size of 1-30 mcm and powder of rare-earth element trifluorides with particle size of 10-70 nm at molar ratio of 1:1.Thermal treatment of the blend is conducted at 650-800 °C for 20-30 minutes in atmosphere of argon, sulfiding gases HS+CSand fluoridiser gases CF, CFobtained in Teflon pyrolysis.EFFECT: homogeneous phase powders.2 ex