Microwave Properties in BaO-TiO2 System Added by ZrO2 and WO3
Both BaTi4O9 and Ba2Ti9O20 have the best microwave properties among many compounds in BaO-TiO2 system.The microwave performance of the ceramics in BaO-TiO2 system,which were prepared by conventional solid state method,was investigated in this paper.The study indicates that the (Ti,Zr)/Ba ratio has a great effect on the dielectric properties of the ceramic due to different BaTi4O9/Ba2Ti9O20 ratio.The pure BaTi4O9 ceramic exhibits the most outstanding microwave properties,with εr=35.55 and Q×f=43300GHz.On the contrary,the dielectric property of the pure Ba2Ti9O20 ceramic was not good enough,which should be doped with some additive additions.WO3 was incorporated into the system and the sintering temperature was adjusted to improve the microwave dielectric property.The Q×fwas increased to 38000GHz by adding 1.35mol% WO3 due to the formation of a little BaWO4 phase.When sintered at a higher temperature (1380℃),the BaO-TiO2 system ceramic has εr =37.04 and Q×f=44874GHz.
microwave dielectric property BaTi4O9 Ba2Ti9O20
Yang Xinye Wang Xiaohui Ji An Li Longtu
State Key Laboratory of New Ceramic and Fine Processing,Tsinghua University,Beijing 100084,China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1155-1159
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）