pH值对溶胶-凝胶法制备Ba(Ti0.86Zr0.14)O3基粉体及陶瓷的影响研究  

Study on Influence of pH Value on Preparation of Ba(Ti0.86Zr0.14)O3-based Powders and Ceramics

作　　者：湛新星 同鑫[1] ZHAN Xinxing;TONG Xin(School of Chemistry and Materials Science,Guizhou Normal University,Guiyang 550025,China)

机构地区：[1]贵州师范大学化学与材料科学学院,贵阳550025

出　　处：《中国陶瓷》2020年第12期41-46,共6页China Ceramics

基　　金：贵州省科学技术基金项目(黔科合LH字[2014]7044号)。

摘　　要：通过溶胶-凝胶一步法制备了晶粒尺寸在10μm以下的致密的Ba(Ti0.86Zr0.14)O3基Y5V型陶瓷,系统研究了溶胶的pH值对粉体的粒径、陶瓷的烧结及介电性能的影响规律。结果表明,溶剂的pH值对粉体的形成、粒度分布和团聚产生影响,进而影响到陶瓷的性能。pH=2.5时制备的陶瓷的最大介电常数达到21200。在溶胶-凝胶一步法中,所有的反应都发生在原子尺度上,最终得到结晶程度高、化学计量组成均匀的纳米颗粒,为制备高纯超细的钛酸钡基Y5V陶瓷开辟了新的途径。In this paper,density Ba(Ti0.86Zr0.14)O3-based Y5V ceramics with an average diameter below 10μm were prepared via a sol-gel one-step route.The effect of pH value on the sintering and dielectric properties of Ba(Ti0.86Zr0.14)O3-based Y5V powders and ceramics were systematically studied.In this process,pH value of the solvent had a great effect on the colloid formation,grain size distribution and degree of aggregates.Furthermore,the properties of ceramics were affected.And a high dielectric constant of 21200 was obtained at pH of 2.5.In the synthesis route of sol-gel one-step,all reactions occurring on the atomic scale lead to a final nanoparticle with high degree of crystallization,stoichiometric composition and homogeneity.

关 键 词：溶胶—凝胶法 PH值 Ba(Ti0.86Zr0.14)O3 Y5V陶瓷 介电性能 

分 类 号：TQ174.56[化学工程—陶瓷工业]