Ba_(0.6)Sr_(0.4)TiO_3/ZnNb_2O_6复相陶瓷的显微结构和介电性能  

Microstructure and Dielectric Properties of Ba_(0.6)Sr_(0.4)TiO_3/ZnNb_2O_6 Composite Ceramics

作　　者：胡国辛[1] 高峰[1] 王通[1] 李真[1] 田长生[1] 

机构地区：[1]西北工业大学材料学院,陕西西安710072

出　　处：《压电与声光》2010年第1期122-125,共4页Piezoelectrics & Acoustooptics

基　　金：西安应用材料创新基金资助项目(XA-AM-200808);西北工业大学科技创新基金资助项目(2006CR11)

摘　　要：采用传统电子陶瓷工艺制备了Ba_(0.6)Sr_(0.4)TiO_3/ZnNb_2O_6(BSTZ)复相陶瓷,研究了ZnNb_2O_6含量对BSTZ陶瓷结构和介电性能的影响规律。结果表明,BSTZ复相陶瓷可在较低温度下烧结成瓷;陶瓷中除了Ba_(0.6)Sr_(0.4)Ti_3和ZnNb_2O_6两种主晶相,还有新相BaNb_(3.6)O_(10)生成;陶瓷的介电常数和介电损耗均随ZnNb_2O_6含的增加而降低;当x(ZnNb_2O_6)=0.6(摩尔比)时,复相陶瓷在微波下的介电常数为74,介电损耗为0.043,可调性可达10.54%(1.0 kV/mm)。Ba0.6Sr0.4TiO3/ZnNb2O6 （BSTZ） composite ceramics were fabricated hy the conventional ceramic processing. The effects of the content of ZnNb2O6 on the mierostruetures and dielectric properties of BSTZ ceramics were investigated. The results showed that P, STZ composite ceramics can be sintered at a lower temperature. BaNb3.6 O10 phase is observed in the ceramics besides perovskite phase Ba0.6 Sr0.4 TiO3 and ZnNb2 06 phase. The dielectric constant and the dielectric loss decreased with the increase of ZnNb206 content. When the content of Zn- Nb2 O6 is 0.6 （molar ratio）, the dielectric constant of composite ceramics is 74, and the dielectric loss is 0. 043 at microwave frequencies. The dielectric tunability of 10. 54% at l. 0 kV/mm DC bias could be obtained.

关 键 词：钛酸锶钡 复相陶瓷 介电性能 可调性 微波性能 

分 类 号：TN384[电子电信—物理电子学]