ZnO添加对MgTiO_3陶瓷的烧结及微波介电性能的影响  

Effects of ZnO additive on sintering behavior and microwave dielectric properties of MgTiO_3 ceramics

作　　者：徐岩岩[1] 傅仁利[1] 李冉[1] 顾席光[1] 韩巍 

机构地区：[1]南京航空航天大学材料科学与技术学院,江苏南京210016 [2]广东风华高新科技股份有限公司技术中心,广东肇庆526020

出　　处：《电子元件与材料》2011年第10期11-14,共4页Electronic Components And Materials

基　　金：2010年风华高科技术创新项目资助(No.FH2010RDZ010)

摘　　要：采用传统固相反应法制备了Mg0.95Zn0.05TiO3(MZT)微波介质陶瓷,研究了添加ZnO对MgTiO3陶瓷的烧结过程及介电性能的影响。结果表明,添加ZnO不仅有效降低了MgTiO3陶瓷的烧结温度,提高了陶瓷的致密度,而且有效抑制了中间相MgTi2O5的产生,提高了MgTiO3陶瓷的微波介电性能。当ZnO添加量为摩尔分数5%时,在1 300℃烧结4 h所制MZT陶瓷的物相组成为Mg0.95Zn0.05TiO3,相对密度为96.4%,介电性能为:相对介电常数εr=19.0,品质因数Q.f=27 508GHz(7.8 GHz),频率温度系数τ=–16×10–6/℃。Mg0.95Zn0.05TiO3（MZT） microwave dielectric ceramics were prepared by conventional solid state method.The effects of ZnO additive on the sintering process and dielectric properties of MgTiO3 ceramics were investigated.The results show that the sintering temperature of MgTiO3 ceramics can be lowed,and the densification of MgTiO3 ceramics can be improved through the addition of ZnO.Moreover,the ZnO additives can effectively restrain the formation of intermediate phase MgTi2O5,and keep excellent microwave dielectric properties of MgTiO3 ceramics.The relative density of prepared MZT ceramic with 5%（mole fraction） ZnO additive sintered at 1 300 ℃ for 4 h is 96.4%,and the MZT ceramic exhibits the optimum microwave dielectric properties： er=19.0,Q·f =27 508 GHz（7.8 GHz）,τ｜= –16×10–6/℃.

关 键 词：MGTIO3 烧结 ZNO 微波介电性能 

分 类 号：TQ174.756[化学工程—陶瓷工业]