公开(公告)号：US4263164A

公开(公告)日：1981-04-21

申请号：US75483

申请日：1979-09-14

申请人： Franciscus J. M. Swinkels ,  Rudolfus J. C. Bannenberg ,  Johannes H. A. Schmitz

发明人： Franciscus J. M. Swinkels ,  Rudolfus J. C. Bannenberg ,  Johannes H. A. Schmitz

IPC分类号： C09K11/08 ,  C01F17/00 ,  C09K11/77 ,  C09K11/80 ,  C09K11/46

CPC分类号： C01F17/0025 ,  C09K11/7706 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/60

摘要： In a method of preparing a luminescent aluminate comprising aluminium and one or more of the metals yttrium and elements of the lanthanum series the component metals of the aluminate are co-precipitated from aqueous solutions of salts of these metals by combining these salts with a precipitation agent comprising carbon dioxide and ammonia in a quantity from 1 to 3 mole per mole of carbon dioxide. Such a quantity of the precipitation agent is used that the molar ratio of the carbon in the precipitation agent to the sum of the metals in the salts has a value from 1 to 10, a higher value in that range being chosen for this ratio according as the desired average grain size of the precipitate is larger. Finally, the precipitate obtained is heated at an elevated temperature.

摘要翻译： 在制备包含铝和一种或多种金属钇和镧系元素的发光铝酸盐的方法中，铝酸盐的组分金属通过将这些盐与沉淀剂组合而从这些金属的盐的水溶液中共沉淀 每摩尔二氧化碳含有1至3摩尔的二氧化碳和氨。 使用这种量的沉淀剂，沉淀剂中的碳的摩尔比与盐中的金属的总和的值为1至10，该比例的该值的较高值根据 所需沉淀物的平均晶粒尺寸较大。 最后，将得到的沉淀物在高温下加热。