ZnO-B_2O_3掺杂陶瓷的微观结构和微波介电性能  

Microstructure and microwave dielectric properties of ZnO-B_2O_3 doped ceramics

作　　者：刘立新[1] 张玉华[1] 陆茵[1] 刘欣宁 LIU Li-xin ZHANG Yu-hua LU Yin LIU Xin-ning(School of Mechanical Engineering, He＇nan Polytechnic Institute, Nanyang 473009, Chin)

机构地区：[1]河南工业职业技术学院机械工程学院,河南南阳473009

出　　处：《粉末冶金工业》2017年第5期47-52,共6页Powder Metallurgy Industry

摘　　要：研究了ZnO-B_2O_3(ZB_2)对(Ca_(0.254)Li_(0.19)Sm_(0.14))TiO_3陶瓷的烧结行为和微波介电性能的影响。结果表明:ZnO-B_2O_3添加质量分数为3%时,试样的相对密度达到最大值;烧结温度从1 300℃降低到1 100℃时,试样的微波介电性能没有衰减。添加3%ZB_2(质量分数)的(Ca_(0.254)Li_(0.19)Sm_(0.14))TiO_3陶瓷在1 100℃烧结3 h呈现出较好的微波介电性能,介电常数ε_r=108.2,品质因数Q_f=6 545 GHz,共振频率温度系数τf=6.5×10^(-6)/℃,表明ZB_2是一种有效改善(Ca_(0.254)Li_(0.19)Sm_(0.14))TiO_3陶瓷致密性和微波介电性能的烧结助剂。The effects of ZnO-B_2O_3（ZB2）on the sintering behavior and microwave dielectric properties of （Ca_（0.254）Li_（0.19）Sm_（0.14））TiO_3 ceramics were investigated. Results show that the relative densities of the specimens reach the maximum value when adding 3%ZB_2（mass percent）. The sintering temperature is lowered from 1 300 ℃to 1 100 ℃ without degradation of the microwave dielectric properties. The （Ca_（0.254）Li_（0.19）Sm_（0.14））TiO_3 ceramic with3% ZB_2（mass percent）sintered at 1 100 ℃ for 3 h shows good microwave dielectric properties,which is ε_r=108.2,Q_f=6 545 GHz,and τf=6.5×10^（-6）/℃,indicating that ZB_2 is an effective sintering aid to improve the densification and microwave dielectric properties of （Ca_（0.254）Li_（0.19）Sm_（0.14））TiO_3 ceramics.

关 键 词：ZnO-B2O3 微波介电性能 致密化 陶瓷 烧结行为 

分 类 号：TQ174.1[化学工程—陶瓷工业]