高性能β″-Al_2O_3陶瓷压型粉料的制备  

Preparation of Forming Powders of High Quality β"-Al2O3 Ceramics

作　　者：樊增钊[1] 顾中华[1] 陈昆刚[1] 徐孝和[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《无机材料学报》1999年第1期36-42,共7页Journal of Inorganic Materials

摘　　要：本工作研究了β″-Al2O3陶瓷压型粉料的化学组成；制备方法对其密度、电导及显微结构的影响．与水基料浆喷雾干燥相比，酒精基料浆稳定性好，易于调制，其喷雾干燥粉料收获率高，化学组成均匀，耐大气湿气性好，粉体颗粒可在较低压力下被压碎，生坯压实密度较高．采用Li2O－Al2O3和Na2O－Al2O3混合物的高温煅烧产物为组元，配成化学组成为0.69～075wt％Li2O，8．85～9．10wt％Na2O，其余为Al2O3的酒精基料浆喷雾干燥粉料，可获得密度、电导和显微结构俱佳的高性能β″-Al2O3陶瓷．The influences of chemical composition and fabrication technology of forming powders onsintering density, Na-ion conductivity and microstructure of β'-Al2O3 ceramics were investigated.Compared with water-based slurry,ethanol-based slurry was more stable and could be preparedmore easily. Moreover, the latter had better stability to moisture and chemical homogeneity,and the agglomerates could be crushed at a lower pressure. Thus, higher green densities couldbe obtained. High quality β'-Al2O3 ceramics with densities >3.23g.cm(-3), and resistivities of5-6cm at 300℃ and homogeneous microstructures were prepared with such powder spray driedfrom ethanol-based slurry which was composed of two components, namely Li2O-Al2O3 and Na2OAl2O3 calcinated at 1250℃ for 2h. respectively. The contents of Li2O and Na2O in the resultingpowders were variable in the ranges of 0.69-0.75wt% and 8.85-9.10wt%.

关 键 词：压型粉料 喷雾干燥 陶瓷 氧化铝 

分 类 号：TQ174.758[化学工程—陶瓷工业] TF123[化学工程—硅酸盐工业]