B_2O_3对Ca[(Li_(1/3)Nb_(2/3))_(0.95)Zr_(0.15)]_(3+δ)陶瓷微波介电性能的影响

Influence of sintered aid B2O3 on microwave dielectric properties of Ca [(Li_(1/3)Nb_(2/3))_(0.95)Zr_(0.15)]_(3+δ) ceramics

研究了B2O3对陶瓷的烧结性能及微波介电特性的影响．结果表明B2O3的掺入能使Ca[（Li1/3Nb2／3）0.95Zr0.15]3＋δ（CLNZ）陶瓷体系的烧结温度降低160-210℃，谐振频率温度系数τf随B2O3掺入量增加，但烧结温度对其没有明显影响，在990℃，掺入质量分数为1．0％的B2O3，陶瓷微波介电性能最佳．ετ=33．1，Qf=13700GHz，τf=-6．8×10^-6／℃；而且，掺入2．0％的B2O3，在940℃烧结4h，能获得介电性能良好的陶瓷，其ετ=31．4，Qf=8700GHz，τf=-5．2×10^-6／℃．

The effects of the B2O3 on the sinterability and microwave dielectric properties of Ca[（Li1/3 Nb2/3）0.95 Zr0.15]3＋δ （CLNZ） ceramics were investigated. B2O3 doping can effectively reduce sintering temperature by 160-210℃. The temperature coefficient of resonator frequency （τf） increased with B2O3 content, but not changed drastically with sintering temperature sintering temperature. When the B2O3 of 1.0 % were added, the optimum microwave dielectric properties. ετ=33.1, Qf=13 700 GHz and τf=-6.8×10^-6/℃ were obtained at the sintering temperature of 990 ℃. Furthermore. CLNZ specimens with 2.0 % B2O3 sintered at 940 ℃ for 4h showed good microwave dielectric properties of ετ=31.4, Qf=8 700 GHz and τf=-5.2×10^-6/℃.