采用传统固相法制备Mg4Nb2O9/CaTiO3复合陶瓷,研究Li2CO3-V2O5(LV)共掺杂对其烧结特性、微观结构和微波介电性能的影响.实验结果表明:一定量的LV掺杂能够使Mg4Nb2O9/CaTiO3复合陶瓷的烧结温度降至1200℃;XRD和EDX综合分析表明,样品由(Mg4-xCax)Nb2O9/(Ca1-xMgx)TiO3两相所组成;陶瓷谐振频率温度系数趋近于零.含质量分数1.5%的LV,1200℃、5 h烧结样品具有较好的微波介电性能:介电常数23.29,品质因数23460 GHz,谐振频率温度系数1.0×10-6℃-1,有望用作全球卫星定位系统微带天线基板材料.
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