摘要
采用钽镁共沉淀法制备ＭｇＴａ２Ｏ６粉体，然后与ＢａＣＯ３粉体混合制备Ｂａ（Ｍｇ１／３Ｔａ２／３）Ｏ３（简称ＢＭＴ）微波陶瓷材料．成功地解决了ＴａＣｌ５溶解问题．对钽镁共沉条件和粉体热分解工艺与粉体的平均粒径和钽镁比例关系；ＢＭＴ陶瓷制备工艺与材料的微观结构和微波性能关系进行了研究．制备的ＭｇＴａ２Ｏ６晶相粉体平均粒径为０．３μｍ，最大与最小粒径比为５．制备的ＢＭＴ陶瓷几乎不含ＢａＴａ２Ｏ６等杂相，无载Ｑ值可达５４００（１０ＧＨｚ下）
MgTa2O6 powder was prepared by chemical coprecipitation method, and then mixed with high purity fine BaCO3 powder to prepare Ba(Mg1/3Ta2/3)O3 (BMT) ceramics by ordinary dry method. The problem of TaCl5 dissolving has been solved. The influence of coprecipitation and thermal decomposition conditions on the particle size and Ta/Mg molar ratio of MgTa2O6 powder was studied. The relation of microstructure and microwave properties of BMT ceramics with Ta/Mg molar ratio and sintering conditions was also investigated. The crystalline MgTa2O6 fine powder with particle size of 0.3 m (dmax/dmin=5) was obtained by chemical coprecipitation method. BMT ceramics without BaTa2O6 extra phase, which has a unloaded Q value of 5400 (at 10 GHz), was obtained by the wet-dry combination technique when the BaMgTa is 312 (molar ratio)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1999年第4期437-444,共8页
Journal of The Chinese Ceramic Society
关键词
钽镁酸钡
微波陶瓷
共沉法
煅烧法
barium magnesium tantalate microwave ceramics, coprecipitation method, wet-dry combination technique, magnesium tantalate powder,barium tantalate extra phase
