论文部分内容阅读
γ－Ａｌ２Ｏ３为低温型晶体，是尖晶石型结构，ｎ（Ｏ）∶ｎ（Ａｌ３＋）为１∶２，在氧化气氛下升温至９５０～１０００℃时，则向α－Ａｌ２Ｏ３转变．α－Ａｌ２Ｏ３中氧原子呈六方密堆积，Ａｌ３＋离子仅占据氧八面体空隙．在氮气氛下，尖晶石结构在高温下可稳定存在...
γ-Al 2 O 3 is a low-temperature type crystal with a spinel structure. When n (O): n (Al 3+) is 1: 2, γ-Al 2 O 3 transitions to α-Al 2 O 3 when heated to 950-1000 ° C in an oxidizing atmosphere. The α-Al2O3 oxygen atoms hexagonal close packing, Al3 + ions only occupy the oxygen octahedral voids. Under nitrogen atmosphere, the spinel structure can stably exist at high temperature ...