摘要
采用预合成的方法,分别用得到的单斜类锆钙钛矿相Bi2(Zn1/3Ta2/3)2O7(β-BZT)和钙钛矿相CaTiO3(CT)的粉末作为正负温度系数组元,用sol-gel法制备的ZnO-B2O3-SiO2玻璃,包覆两组元颗粒以阻止其相互反应,从而制备复相零温度系数微波陶瓷。结果表明:预合成及颗粒包覆法可抑制两相固溶反应,有效降低复相陶瓷的烧结温度,调节温度系数。特别是900℃烧结的w(CT)为4%的样品,其εr约为47,αε为2.8×10–6℃–1。
Powders of Bi2（Zn1/3Ta2/3）2O7 （β-BZT） and CaTiO3 （CT） were chosen as positive and negative temperature coefficient constituents. A sol-gel particle-coating technique was developed to form a thin ZnO-B2O3-SiO2 glass layer on the surface of BZT and CT powder. The results show that presynthesizing method and particle-coating method are effective to suppress the reaction between the two constituents, reduce the sintering temperature and adjust temperature coefficient. Typically, when w （CT）= 4% and the sample is sintered at 900℃, the er and as of obtained sample are 47 and 2.8×10^-6℃^-1 respectively.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2006年第2期38-40,共3页
Electronic Components And Materials
基金
国家重点基础研究计划资助项目(2002CB613302)
上海市重点学科建设项目
