采用固相反应法制备了 (Mg0.93Ca0.05Zn0.02)(Ti1-xAlx)O3介质陶瓷.研究了Zn-Al共掺杂对0.95MgTiO3-0.05CaTiO3(95MCT)陶瓷介电性能的影响.结果表明：Zn-Al共掺杂的95MCT陶瓷的主晶相为MgTiO3和CaTiO3两相结构，Zn-Al共掺杂可以抑制中间相MgTi2O5的产生，同时，有第二相CaAl2O4出现；Zn-Al共掺杂能有效地降低95MCT陶瓷的烧结温度至1300℃，改善介电性能，并对介电常数温度系数具有调节作用.当 Zn2+掺杂量为0.02mol、Al3+掺杂量为0.02mol时， 在1300℃烧结2.5h获得最佳性能：εr =20.35, tgδ=2.0×106, αc=1.78×106.
The dielectric properties of (Mg0.95Ca0.05Zn0.02)(Ti1-xAlx)O3 ceramics prepared by conventional solid-state route were investigated. The results show that MgTiO3 and CaTiO3 are the main phases of 95MCT ceramics with codoped Zn-Al, without second phase MgTi2O5 is observed but a new phase CaAl2O4. Zn-Al additive can lower the sintering temperature of 95MCT ceramics to 1300℃, and improve the dielectric properties. Moreover, it also effectively adjusts the temperature coefficient of dielectric constant. The 95MCT ceramics with x=0.02 possess excellent dielectric properties: dielectric constant εr of 20.35, dielectric loss tgδ of 2.0×106 and temperature coefficient of dielectric constant αc value of 1.78×106.
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