Ca-B-Si掺杂对Ba(Zn1／3Ta2／3)O3陶瓷介电性能的影响

Effect of Ca–B–Si Additive on the Microwave Dielectric Properties of Ba(Zn_(1/3)Ta_(2/3))O_3 Ceramics

采用固相烧结法制备了添加烧结助剂Ca–B–Si(CBS)微晶玻璃的Ba(Zn1/3Ta2/3)O3(BZT)陶瓷。研究了CBS添加量对BZT陶瓷烧结温度和微波介电性能的影响。结果表明,CBS起到助溶剂的作用,添加CBS降低了BZT陶瓷的烧结温度,并改善了微波介电性能。添加2%(质量分数)的CBS时,BZT的烧结温度从纯相烧结时的1 600℃降低到1 150℃,并具有良好的微波介电特性:相对介电常数εr=32.06,品质因数与频率之积Q×f=149×103 GHz,谐振频率温度系数τf=–0.14×10–6/℃。

Ba（Zn1/3Ta2/3）O3（BZT） microwave dielectric ceramics with Ca–B–Si（CBS） microcrystal glass were prepared by a solid state reaction method.The effect of doping amounts of CBS on the sintering temperature and the dielectric properties of the BZT ceramics were investigated.The results indicate that the addition of CBS as a solvent can reduce the sintering temperature of the BZT ceramics and improve the microwave dielectric properties.The sintering temperature of the BZT ceramics doped with the CBS of 2% in mass could be decreased from 1 600 ℃ to 1 150 ℃.The superior dielectric properties at 1 150 ℃ were the relative dielectric constant εr of 32.06,the product of quality factor and frequency（Q × ？） of 149 × 103 GHz and the resonance frequency temperature coefficient τf of –0.14 × 10–6/℃