Zn-Al共掺MgTiO_3-CaTiO_3陶瓷的结构与性能  

The Structure and Properties of MgTiO_3-CaTiO_3 Ceramics with Zn-Al Codoped

作　　者：杨秀玲[1] 丁士华[1] 张东[1] 宋天秀[1] 

机构地区：[1]西华大学材料科学与工程学院,四川成都610039

出　　处：《压电与声光》2010年第3期461-463,共3页Piezoelectrics & Acoustooptics

基　　金：四川省教育厅科技基金资助项目(2006c025);校人才基金资助项目(R0620109)

摘　　要：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,有第二相CaAl2O4出现;Zn-Al共掺杂能有效降低95MCT陶瓷的烧结温度至1 300℃,且得到致密的晶粒结构,改善介电性能,并对介电常数温度系数具有调节作用。当掺杂Zn2+、Al3+的摩尔分数均为0.02时,在1 300℃烧结2.5 h获得最佳性能:介电常数为20.35,介电损耗为2.0×10-6,介电常数温度系数为-1.78×10-6。（Mg0.93Ca0.05Zn0.02）（Ti1-xAlx）O3 ceramics were prepared by conventional solid-state route.The influences of 0.95MgTiO3-0.05CaTiO3（95MCT with Zn-Al co-doped were investigated.The results showed that MgTiO3 and CaTiO3 were the main phases of 95MCT ceramics with Zn-Al co-doped.A second phase CaAl2O4 appeared.Zn-Al additive could lower the sintering temperature of 95MCT ceramics to 1 300 ℃.Dense crystal structure was observed,the dielectric properties were improved,and the temperature coefficient of dielectric constant could be adjusted.The 95MCT ceramics with Zn2＋ of 0.02 mol and Al3＋ of 0.02 mol possessed excellent dielectric properties after sintered 2.5 h at 1 300 ℃ a dielectric constant εr of 20.35,a dielectric loss tan δ of 2.0×10-6 and a temperature coefficient of dielectric constant αc value of-1.78×10-6.

关 键 词：MgTiO3-CaTiO3陶瓷 Zn-Al共掺杂 介电性能 

分 类 号：TQ174[化学工程—陶瓷工业]