采用固相合成法制备了(Y0.99R0.01)2 Ti2O7(R=Pr、Tb、Ho、Er、Tm、Yb、Lu)陶瓷,研究了Pr、Tb、Ho、Er、Tm、Yb及Lu掺杂对Y2Ti2O7陶瓷物相组成、烧结性能和微波介电性能的影响.结果表明A位取代能改进其微波介电性能.烧结样品为单相的烧绿石结构,主晶相为Y2Ti2O7.当R=Er,1450℃烧结4h时,(Y0.99Er0.01)2Ti2O7陶瓷的微波介电性能最佳:εr=44.3,Q×f=12021GHz(5.371GHz),τf=+44×10-6/℃,优于Y2Ti2O7陶瓷的介电性能(εr=54,Q×f=6565 GHz,τf=-31×10-6/℃).
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