公开(公告)号：US3929665A

公开(公告)日：1975-12-30

申请号：US47418674

申请日：1974-05-29

申请人： MONTEDISON SPA

发明人： GAZZARRINI FRANCO ,  AGUZZI PAOLO ,  CORSINI-MENA ADRIANA

IPC分类号： C09K11/77 ,  C09K11/84 ,  C09K11/46

CPC分类号： C09K11/7771

摘要： There is disclosed a new process for preparing oxysulphides of yttrium, gadolinum or lanthanium doped with elements of the rare earth groups, that is to say oxysulphides of yttrium, gadolinum or lanthanium in which the base element is partially substituted by elements of the rare earths group and which, on excitation by ultraviolet radiations or by electrons, become luminescent and emit radiations in the visible spectrum. An aqueous suspension or solution of an oxide, nitrate or halide of yttrium, gadolinum or lanthanium, an oxide, nitrate or halide of a rare earth element, and a sulphurating element, is subjected to a hydrothermal synthesis, optionally in the presence of a base for adjusting the pH of the aqueous medium to a pH of from 8 to 12; the solid product of the hydrothermal synthesis is filtered and dried; the dried solid product is mixed with a sulphurizing compound, subjected to a heat-treatment, reduced to a pulp in water and filtered and dried to obtain the oxysulphide having the desired degree of luminescence.

摘要翻译： 公开了一种用于制备掺杂有稀土元素的钇，钆或镧的氧硫化物的新方法，也就是说钇，钆或镧的氧硫化物，其中碱元素被稀土元素的元素部分取代 并且在紫外线辐射或电子的激发下，在可见光谱中变成发光并发射辐射。