摘要
采用传统固相反应法,制备了Ba(Co0.6Zn0.4)1/3Nb2/3O3(0.6BCN-0.4BZN)微波介质陶瓷。系统研究了Ba(Co0.6Zn0.4)(1/3+x)Nb2/3O3陶瓷中B位(Zn,Co)离子的非化学计量比(x=-0.015,-0.009,-0.003,0,0.003,0.009,0.015)对该微波介质陶瓷性能的影响。结果表明:少量的B位离子缺量,可以促进烧结的致密化。x为-0.009时所制陶瓷密度最大,达到理论密度的99%以上。在1400℃下烧结20h,可以获得εr=35.35,Q.f=40787GHz(f=5.180GHz),τf=-3×10-6/℃的0.6BCN-0.4BZN陶瓷。
Ba（Co0.6Zn0.4）（1/3）Nb2/3O3（0.6BCN-0.4BZN） microwave dielectric ceramics were prepared by using the conventional solid-state method.The effects of B-site（Co,Zn） cation nonstoichometric ratio（x=-0.015,-0.009,-0.003,0,0.003,0.009,0.015） on the microwave dielectric properties of prepared Ba（Co0.6Zn0.4）（1/3＋x）Nb2/3O3 ceramics were investigated.The results indicate that slight B site cation deficiency can increase the densification degree of the 0.6BCN-0.4BZN microwave dielectric ceramics.Meanwhile,the density with a maximum（above 99% of theoretical density） can be achieved while the x value is-0.009.Especially,when the ceramics are sintered at 1 400 ℃ for 20 h,the relative permittivity and the Q.f value measured at 5.180 GHz are 35.35 and 40 787 GHz,respectively.The temperature coefficient of resonant frequency（τf） shows a negative value of-3×10-6 /℃.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2010年第9期44-47,共4页
Electronic Components And Materials
基金
国防基础科研基金资助项目
