B位取代对钛酸锌相结构及介电性能的影响  

Effect of B-site Substitution on Phase Structure and Dielectric Properties in Zinc Titanate Ceramics

作　　者：刘向春[1] 高峰[2] 赵鸣[2] 田长生[2] 

机构地区：[1]西安科技大学材料系,陕西西安710054 [2]西北工业大学材料学院,陕西西安710072

出　　处：《压电与声光》2007年第5期565-567,共3页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(60501015);西北工业大学博士论文创新基金资助项目(CX200408)

摘　　要：通过固相烧结法结合半化学法制备了ZnO-（1-x）TiO2-xSnO2（x=0.04-0.20）陶瓷,掺杂1.0%3V2O5（质量分数）-B2O3降低陶瓷的烧结温度,研究了B位取代对ZnTiO3相结构及介电性能的影响。结果表明,Sn的加入促进了六方相分解,形成了立方尖晶石结构的固溶相Zn2（Ti1-xSnx）O4;随烧结温度升高,Sn的固溶量增加,900℃时,最大固溶量为0.08 mol。900℃烧结试样,随x增加,其介电常数ε先增大后减小,而介电损耗tanδ恰好相反,先减小后增大,当x=0.12时,得到ε的最大值（ε=29）和tanδ的最小值（tanδ=9.86×10^-5）。900℃烧结的具有优良介电性能的ZnO-（1-x）TiO2-xSnO2（x=0.04-0.20）陶瓷有很好的实际应用前景。ZnO-（1-x）TiO2-xSnO2（x=0.04-0.20）ceramics were prepared by conventional mixed-oxide method combined with a semi-chemical processing. 1.0%3V2O5-B2O3 addition was used to lower the sintering temperature of ceramics. The effect of B-site substitution on phase structure and dielectric properties were investigated. The resultsed showed that the substituting Sn for Ti accelerated the decomposition of hexagonal phase, and cubic spinel Zn2（Ti1-xSnx）O4 solid solution formed. The best dielectric properties obtained at x=0. 12. The ZnO-0.88TiO2- 0.12SNO2 ceramics sintered at 900 ℃ exhibited the dielectric properties： ε=29,tanδ=9.86×10^-5. Due to their good dielectric properties, low firing characteristics, ZnO-（1-x）TiO2-xSnO2（x=0.04-0.20） can serve as the microwave dielectric capacitor.

关 键 词：钛酸锌 低温烧结 B位取代 相结构 介电性能 

分 类 号：TM28[一般工业技术—材料科学与工程]