MnCO_3对BMT系陶瓷结构和微波特性的影响  

The Effect of MnCO_3 on the Structure and Microwave Properties of BMT Ceramic

作　　者：宋佳[1] 谢道华[1] 邢晓东[1] 王洪儒[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《压电与声光》2004年第6期488-490,共3页Piezoelectrics & Acoustooptics

基　　金：国家"八六三"计划基金资助项目(2001AA325110)

摘　　要：研究了w(MnCO3)从0.5%～5%(质量分数)对复合钙钛矿Ba(Mg1/3Ta2/3)O3(BMT)系陶瓷结构和微波特性的影响。对于w(MnCO3)为0.5%的BMT系陶瓷,其主晶相为1∶2有序六方超晶格和无序立方结构,相应于最大的品质因数与频率的积(Qf)值。随着w(MnCO3)的增加,其Qf值下降。介电常数ε随w(MnCO3)的增大而略有下降,这是由于附加相Ba0.5TaO3影响所致。The effects of MnCO_3 on the structure and microwave properties of complex perovskite Ba(Mg_(1/3)Ta_(2/3))O_3 ceramic were investigated as a function of the amount of MnCO_3 from 0.5% to 5%. For the specimen with 0.5% of MnCO_3, the main phases are ordered hexagonal super lattice and disordered cubic structure, corresponding to the maximum value of Qf value. With the increasing of the amount of MnCO_3, the Qf value decrease. The dielectric constant (were decreased slightly with increasing of MnCO_3, which are due to the increase of Ba_(0.5)TaO_3 phase as a secondary phase.

关 键 词：微波特性 复合钙钛矿 微波陶瓷 有序结构 

分 类 号：TM22[一般工业技术—材料科学与工程] TQ174.75[电气工程—电工理论与新技术]