摘要
采用传统固相反应法制备Li2+xZnTi3O8+0.5x微波介质陶瓷,研究了A位Li的非化学计量比对Li2+xZnTi3O8+0.5x陶瓷的烧结特性、相结构及微波介电性能的影响。结果表明:随着Li2+xZnTi3O8+0.5x(x=–0.2～+0.2)陶瓷中Li含量的逐渐增加,TiO2相逐渐消失,陶瓷的致密度逐渐升高,介电常数逐渐降低,Q.f值先上升再下降,谐振频率温度系数逐渐降低,然后保持不变。当x=–0.05时,Li1.95ZnTi3O7.975陶瓷取得最佳的综合微波介电性能:εr=26.41,Q.f=65 200 GHz,τf=–4.16×10–6/℃。
The Li2＋xZnTi3O8＋0.5x microwave dielectric ceramics were prepared by the conventional solid-state reaction method. The effects of nonstoichiometric Li element on A site on sintering behavior, phase structure and microwave dielectric properties of Li2＋xZnTi3O8＋0.5x ceramics were investigated. The results show that TiO2 phase disappears gradually, the bulk densities of the ceramics increase gradually, the permittivities decrease gradually, Q ·fvalues first increase and then decrease, and the temperature coefficients of resonant frequency decrease slightly then keep a constant with increasing of Li content of Li2＋xZnTi3O8＋0.5x （x=-0.2-＋0.2） ceramics. When x equals to -43.05, Li1.95ZnTi3OT.975 ceramic possesses the best microwave dielectric properties： a εr of 26.41, Q · fvalue of 65 200 GHz, τfof-4.16×10^-6/℃.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2012年第10期5-8,共4页
Electronic Components And Materials
基金
广西科学研究与技术开发计划资助项目(No.桂科攻11107006-42)
关键词
微波陶瓷
非化学计量
介电性能
尖晶石
microwave ceramic
nonstoichiometry
dielectric properties
spinel
