微波反应合成纳米Ba_(1-x)Zn_xTi_(1-y)Sn_yO_3介电材料及其结构、性能研究  

Microwave Synthesis, Structure and Dielectric Property of Ba_(1-x)Zn_xTi_(1-y)Sn_yO_3

作　　者：丁士文[1] 王静[1] 康全影[1] 刘燕朝[1] 刘淑娟[1] 丁宇[1] 

机构地区：[1]河北大学化学与环境科学学院,保定071002

出　　处：《化学学报》2002年第12期2141-2144,共4页Acta Chimica Sinica

基　　金：河北省自然科学基金(No.2 990 78)重点资助项目

摘　　要：采用微波反应技术,合成了一系列Ba1-xZnxTi1-ySnyO3固溶体纳米粉末(0≤x≤ 0.3,0≤y≤ 0.5),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 40nm.通过制陶实验,分别测定了该系列固溶体的室温介电常数、介电损失以及介电常数随温度的变化,结果发现,采用化学方法在BaTiO3中掺入适量锌和锡,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 12 0 0 0以上,介电损耗仅为 0.0 0 7.纳米粉体的烧结温度为 115 0℃,比传统微米级粉体的烧结温度降低 2 0 0～ 2 5 0℃.A series of Ba1-xZnxTi1-ySnyO3(0 less than or equal to x less than or equal to 0.3, 0 less than or equal to y less than or equal to 0.5) solid solutions were synthesized by microwave method. XRD and cell parameters-component figures of the series of the solid solutions powder demonstrate that the compounds are mutually miscible in the solid solutions. Furthermore, there is conducted an observation through a TEM, the product is found to have a shape of uniform, substantially spherical particles with an average particle size of 40 nm in diameter. The results of preparing ceramics show that after adulterating with Zn2+ and Sn4+ in pure BaTiO3 phase, the dielectric constant increases eight times and dielectric loss four times lower than those of pure BaTiO3 phase at room temperature. The sintering temperature of the nano-powder is 200 similar to 250 degreesC lower than that of the micro-powder.

关 键 词：合成 Ba1-xZnxTi1-ySnyO3 介电材料 结构 微波反应 化学掺杂 纳米材料 介电性能 钛酸钡 锌 锡 陶瓷 

分 类 号：TM22[一般工业技术—材料科学与工程]