稀土金属的硫化物具有高熔点、高耐热性和高的化学稳定性,其中,有些还具有良好的半导体性质。因而,在国外许多科学研究单位都在积极地研究稀土金属硫化物的制取方法和应用。稀土金属硫化物在无线电电子工业中,可以作为激光半导体、高温半导体和光电变换装置的材料;在航空工业中,可以作为热电能量转换装置的材料;在冶金工业中,可以作为热电偶、热敏电阻材料和耐火材料;稀土金属的氧硫化物还可以作彩色电视的阴极萤光粉。目前,随着我国社会主义建设的飞速发展,要求冶金工业部门研究制取稀土 Rare earth metal sulfides have high melting points, high heat resistance and high chemical stability, some of which also have good semiconducting properties. Therefore, many foreign scientific research units are actively studying the preparation methods and applications of rare earth sulfide. In the radio electronics industry, rare earth metal sulfides can be used as a material for laser semiconductors, high temperature semiconductors and photoelectric conversion devices; in the aviation industry, they can be used as materials for thermoelectric energy conversion devices; in the metallurgical industry, they can be used as thermocouples, Resistance materials and refractory materials; rare earth metal oxysulfides can also be used for color television cathode phosphor. At present, with the rapid development of socialist construction in our country, the metallurgical industry department is required to study the preparation of rare earth