单分散BaZrxTi(1-x)O3亚微米粉体的可控合成  

Controllable synthesis of monodispersed BaZr_xTi_(1-x)O_3 submicron powders

作　　者：刘宇 崔斌[1] 湛海涯 张璐琭 阎雯青 

机构地区：[1]西北大学合成与天然功能分子化学教育部重点实验室,陕西省物理无机化学重点实验室,西北大学化学与材料科学学院,西安710069

出　　处：《粉末冶金技术》2013年第3期167-173,共7页Powder Metallurgy Technology

基　　金：国家自然科学基金资助项目(21071115);陕西省教育厅科学研究计划项目(09JC01)

摘　　要：采用常压水相法制备了单分散BaZrxTi1-xO3亚微米粉体,通过XRD、SEM等分析检测手段对样品进行表征。系统地研究了锆、钛量比,NaOH浓度及反应物浓度对锆钛酸钡粉体相组成和微观形貌的影响。结果表明,BaZrxTi1-xO3粉体的形貌、颗粒大小和尺寸分布可以通过不同的反应条件来控制。随着Zr含量的增加,粉体粒径增大,分散性变好;随着NaOH浓度及反应物浓度的增加,粉体粒径均减小。实现了单分散性锆钛酸钡亚微米粉体颗粒尺寸在0.47～1.24μm范围内的可控合成,这将在制备小型化、大容量的多层陶瓷电容器方面有很好的应用前景。The monodispersed BaZrxTi1-xO3 submicron powders were synthesized by hydro-phase method at atmospheric pressure. The powders were characterized by means of XRD and SEM. The effect of Zr, Ti; NaOH concentration and reactant concentration on the phase structure and morphology was studied systematically. The results indicate that different reaction conditions can affect the microstructure, particle size and particle size distribution of BaZrxTi1-xO3 powders. The particle size increase with increasing the Zr content while decrease with increasing the NaOH concentration and reactant concentration. Through this method, the monodispersed BaZrxTi1-xO3 submicron powders with controllable grain size range from O. 47 to 1. 24μm were prepared. It is promising for fabrication of muhilayer ceramic capacitors, which has a further downsizing and higher capacitance.

关 键 词：常压水相法 BaZrxTi1-xO3粉体 单分散 可控合成 

分 类 号：O632.13[理学—高分子化学]