Low-Temperature Sintering of Ba5(Nb1-xVx)4O15 Ceramics with H3BO3
Ba5(Nb1-xVx)4O15 (0≤x≤0.1) ceramics doped with H3BO3 were prepared by solid-state reaction.The effects of H3BO3 additives on the sinterability and microwave dielectric properties of the ceramics were investigated.The formation of a single phase was identified with the X-ray powder diffraction patterns of Ba5(Nb1-xVx)4O15 ceramics in the composition x from 0 to 0.025.Minor phases including Ba3(VO4)2 were formed as the secondary phase for the compositions with x>0.025.The dielectric constants (εr) of the ceramics increased firstly from 38.7 to 39.69 with x increasing from 0 to 0.01,and,then decreased to 36.91 with x=0.1,meanwhile,the unloaded quality factor and temperature coefficient of resonance frequency (τf) decreased as the x value increased from 0 to 0.1.Microwave dielectric properties,εr=36.91,Q×f=16,167GHz and τf=35ppm/℃,were obtained for Ba5(Nb0.9V0.1)4O15 ceramics with 1wt% H3BO3 sintered at 900℃ for 2h.
Microwave ceramics Dielectric properties Ba5(Nb1-xVx)4O15
C.Zhang H.Qiu Z.X.Xiong
Department of Materials Science and Engineering,Xiamen University,Xiamen 361005,China
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
132-135
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）