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发明授权
CN101531385B 碱土金属或稀土金属铝酸盐前体化合物,其制备方法及其尤其作为发光体前体的用途 有权

碱土金属或稀土金属铝酸盐前体化合物,其制备方法及其尤其作为发光体前体的用途
摘要：
本发明涉及一种碱土金属或稀土金属铝酸盐前体化合物：a(M1O).b(MgO).c(Al2O3)或者a(M2O1.5).b(MgO).c(Al2O3)，其中M1表示碱土金属，并且M2表示钇或者铈与铽的组合，且a、b与c是满足下述关系式的整数或非整数：0.25≤a≤4；0≤b≤2和0.5≤c≤9；它以基本上过渡型氧化铝的形式结晶；由基本上球形且化学均匀的颗粒构成；并且这些颗粒包括孔，其平均直径为至少10nm。这种铝酸盐前体通过包括下述步骤的方法获得：形成包括铝化合物以及该前体组成中所包含的其它元素的化合物的液体混合物；喷雾干燥所述混合物；并且在700℃至950℃的温度下锻烧该干燥的产物。通过随后锻烧所得产品，获得碱土金属或稀土金属铝酸盐。
摘要（英）：

The invention relates to a precursor compound of an alkaline earth metal or a rare earth metal aluminate of formula: a(M<1>O).b(MgO).c(AL2O3) or a(M<2>O1.5).b(MgO).c(AL2O3), where M<1> = an alkaline earth metal and M<2> = yttrium or a combination of cerium and terbium and a, b et c are either whole numbers or not and obey the relationships: 0.25 <= a <= 4; 0 <= b <= 2 et 0.5 <= c <= 9, crystallized in the form of a transition alumina comprising essentially spherical and chemically homogeneous particles. Said particles have pores the average diameter of which is less than 10 nm. The above is obtained by a method in which a liquid mixture is formed comprising compounds of aluminium and other elements present in the composition of the precursor, said mixture is dried by atomization and the dried product calcinated at a temperature between 700 DEG C and 950 DEG C inclusive.; An alkaline earth metal or a rare earth metal aluminate is obtained by subsequent calcination of the product obtained.

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