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对用化学共沉淀法制备Ｂａ （Ｍｇ１／３Ｔａ２／３） Ｏ３ （ＢＭＴ） 陶瓷及其烧结特性进行了研究。结果表明其烧结温度比用传统方法降低了１８０～２５０℃。在１ ４００℃时获得了致密的陶瓷，其体积密度达理论密度的９６％ ，晶粒排列紧密，介电特性：Ｑ×ｆ＝ ６５ ０００ ＧＨｚ，εｒ＝ ２３～２５，在ｆ＝ １０ＧＨｚ，ｔ＝ － ２０～＋ ６０℃时τｆ ＝ （０～３）×１０－ ６℃－ １。
Ba (Mg1 / 3Ta2 / 3) O3 (BMT) ceramics prepared by chemical coprecipitation method and their sintering characteristics were studied. The results show that the sintering temperature is reduced by 180 ~ 250 ℃ than the traditional method. At 1400 ℃, a dense ceramic was obtained with a bulk density of 96% of the theoretical density and dense grains. The dielectric properties were Q × f = 65 000 GHz and εr = 23-25. At f = 10 GHz, t = - 20 ~ + 60 ℃ when τf = (0 ~ 3) × 10-6 ℃ -1.