Ba_(1-x)Ca_xZr_yTi_(1-y)O_3纳米材料的合成、结构与性能  

Synthesis, Structure and Property of Ba_(1-x)Ca_xZr_yTi_(1-y)O _3

作　　者：丁士文[1] 翟永青 王静[1] 李希茂[1] 秦江雷[1] 

机构地区：[1]河北大学化学系,河北保定071002

出　　处：《河北大学学报（自然科学版）》2000年第3期256-258,共3页Journal of Hebei University(Natural Science Edition)

基　　金：河北省自然科学基金重点资助项目!(299078)

摘　　要：采用常压水相法 ,在100℃以下制备了一系列Ba1 -xCaxZryTi1 -yO3 固溶体纳米粉末(0≤x≤0.5,采用常压水相法 ,在100℃以下制备了一系列Ba1 -xCaxZryTi1 -yO3 固溶体纳米粉末(0≤x≤0.5,0≤y≤3),经XRD物相分析和d -间距 -组成图证明 ,产品为立方晶系的完全互溶取代固溶体 ,结果符合Vegard定律.TEM形貌观察 ,粒子为均匀球形 ,平均粒径70nm.通过制陶实验 ,分别测定了该系列固溶体的室温介电常数以及介电常数随温度的变化 ,结果发现 ,用软化学方法在BaTiO3 中掺入适量钙和锆 ,由于掺杂离子均匀进入母体晶格 ,引起tc 降低 ,室温介电常数达9200 ,比BaTiO3 纯相提高6倍.A series of Ba 1-xCaxZryTi1-yO3 (0≤x≤0.5,0≤y≤0.3) solid solutions were synthesized by soft chemical method below 100 ℃.XRD and cell parameters-component figures of the series of the solid solutions powder demonstrated that the compounds are mutually miscible in the solid solutions. Furthermore, an observation through a TEM was conducted, and the product was found to have a shape of uniform, substantially spherical particles with an average particle size of 70 nm in diameter. The result of preparing ceramics showed that after adulterating with Ca 2+ and Zr 4+ in pure BaTiO 3 phase, the dielectric constant increased six times at room temperature.

关 键 词：BATiO3基固溶体 化学掺杂 介电特性 纳米材料 

分 类 号：TB383[一般工业技术—材料科学与工程] TM21[电气工程—电工理论与新技术]