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METHOD OF PRODUCING POWDERS OF RARE-EARTH DIOXO-SULPHIDE COMPOUNDS Ln2O2S AND SOLID SOLUTIONS BASED THEREON Ln'2O2S-Ln''2O2S (Ln, Ln', Ln'' = Gd-Lu, Y)
METHOD OF PRODUCING POWDERS OF RARE-EARTH DIOXO-SULPHIDE COMPOUNDS Ln2O2S AND SOLID SOLUTIONS BASED THEREON Ln'2O2S-Ln''2O2S (Ln, Ln', Ln'' = Gd-Lu, Y)
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机译：基于稀土Ln' 2 O 的固体二氧化硫化合物Ln 2 O 2 S和固体溶液的制备方法2 S-Ln'' 2 O 2 S（Ln，Ln'，Ln''= Gd-Lu，Y）
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摘要
FIELD: chemistry.;SUBSTANCE: invention relates to inorganic chemistry. A mixture for producing powder of Ln2O2S, Ln2O2S-Ln'2O2S compounds, where Ln, Ln' = Gd - Lu, Y is prepared by adding sulphuric acid to solutions of rare-earth nitrates and precipitation, co-precipitation, crystallisation and co-crystallisation of the obtained rare-earth sulphates. The mixture is heat treated in air at 600°C for 2-3 hours, ground to particle size smaller than 100 mcm and treated in a hydrogen stream at 500-600°C for 5-7 hours while feeding hydrogen at a rate of 7-8 l/h (standard conditions), and then treated in a H2S stream at 850-950°C for 7-10 hours for Gd-Lu or 5-7 hours for Y at the same rate of feeding H2S.;EFFECT: shorter duration of high-temperature heat treatment and reduced amount of hydrogen sulphide when producing oxysulphides of rare-earth elements.;3 ex
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机译：技术领域本发明涉及无机化学。生产Ln 2 O 2 S，Ln 2 O 2 S-Ln' 2 O 2 S化合物，其中Ln，Ln'= Gd-Lu，Y是通过向稀土硝酸盐溶液中添加硫酸并沉淀，共沉淀，结晶而制得的所获得的稀土硫酸盐的共结晶。将该混合物在600°C的空气中热处理2-3小时，磨碎至小于100 mcm的粒径，并在氢气流中于500-600°C的温度处理5-7小时，同时以7的速率进料氢气-8 l / h（标准条件），然后在850-950°C的H 2 S流中对Gd-Lu进行7-10小时处理，对Y进行5-7小时的处理。相同的H 2 S进料速率;效果：生产稀土元素的氧硫化物时，高温热处理的时间较短，硫化氢的量减少。
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