采用固相合成法制备了(Mg4-xLi2x)(Nb1.92V0.08)O9系列微波介质陶瓷.通过XRD、SEM以及HP网络分析仪等测试手段对其烧结特性、晶体结构和微波介电性能进行了系统研究.结果表明:x＜0.3时形成了(Mg4-xLi2x)(Nb1.92V0.08)O9固溶体;x≥0.3时,除主相(Mg4-xLi2x)(Nb1.92V0.08)O9外,还有少量第二相Li3Mg2NbO6生成.微波介电常数ε随x的增大持续升高,品质因数Q则先增大后减小.x=0.2,950℃,5h烧结样品的微波介电性能达到最佳:ε=12.7,Q·f=14078GHz(f0=8GHz).
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