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    • 8. 发明授权
    • Composition based on samarium sesquisulphide, preparation method and use as coloring pigment
    • 基于钐四硫化物的组成,制备方法和用作着色颜料
    • US06419735B1
    • 2002-07-16
    • US09485385
    • 2000-05-19
    • Sylvain BusnotPierre Macaudiere
    • Sylvain BusnotPierre Macaudiere
    • C01F1700
    • C01F17/0037C01P2004/61C01P2006/60C08K3/30C09C1/00C09C3/063
    • The composition is based on a samarium sesquisulphide, it exhibits a samarium purity with respect to other rare earth metals of greater than 99% and it comprises at least one alkali metal or alkaline earth metal element, at least a portion of which is included in the crystal lattice of the said sesquisulphide. According to another embodiment, the composition is based on a sesquisulphide of samarium and of at least one rare earth metal which is solely trivalent and it comprises at least one alkali metal or alkaline earth metal element, at least a portion of which is included in the crystal lattice of the said sesquisulphide. According to a third embodiment, the composition exhibits a samarium purity such that the cerium content is less than 1%. The process consists in reacting samarium, trivalent rare earth metal and alkali metal or alkaline earth metal compounds with a gaseous mixture of hydrogen sulphide and of carbon disulphide.
    • 该组合物基于钐倍半硫化物,相对于大于99%的其它稀土金属显示钐纯度,并且其包含至少一种碱金属或碱土金属元素,其至少一部分包括在 所述倍半硫化物的晶格。 根据另一个实施方案,该组合物是基于钐的倍半硫化物和至少一种仅为三价的稀土金属,并且其包含至少一种碱金属或碱土金属元素,其至少一部分包括在 所述倍半硫化物的晶格。 根据第三实施方案,组合物显示钐纯度,使得铈含量小于1%。 该方法包括使钐,三价稀土金属和碱金属或碱土金属化合物与硫化氢和二硫化碳的气体混合物反应。