湿化学法合成Ba(Mg（1-x）/3ZrxTa2（1-x）/3)O3纳米粉体及半透明陶瓷的制备  

Preparation of Nanopowder and Translucent Ceramic of Ba(Mg（1-x）/3ZrxTa2（1-x）/3)O3 by Wet Chemical Method

作　　者：赵学国 李家科 黄丽群 ZHAO Xueguo;LI Jiake;HUANG Liqun(Jingdezhen Ceramic Institute,Jingdezhen 333403,Jiangxi,China)

机构地区：[1]景德镇陶瓷大学

出　　处：《陶瓷学报》2019年第6期794-799,共6页Journal of Ceramics

基　　金：国家自然科学基金(51462013)

摘　　要：以Ba(OH)2·8H2O、Mg(NO3)2·6H2O、Zr OCl2·8H2O和高纯Ta Cl5为原料,NH3·H2O和C8H6O4为沉淀剂,采用湿化学法将Ba(C8H4O4)、Mg(OH)2、Zr O(OH)2、Ta(OH)5以一定配比混合球磨后经900℃焙烧后制备了Ba(Mg(1-x)/3ZrxTa2(1-x)/3)O3(BMZT)粉体。用X射线衍射仪、热分析仪、扫描电镜和透射电镜等测试手段对BMZT前驱体和煅烧后的粉体进行表征。结果表明,前驱体经过900℃煅烧3 h可制备出近球形、颗粒尺寸约为0.1μm的陶瓷粉体。当Zr4+以10mol%掺杂时,形成的Ba(Mg0.3Zr0.1Ta0.6)O3粉体呈现出立方晶体结构。以该BMZT粉体为原料,用氧气烧结技术于1550℃制备出BMZT半透明陶瓷。所制备的Ba(Mg0.3Zr0.1Ta0.6)O3陶瓷样品在可见光区直线透过率达到50%左右。Nanopowders of Ba(Mg(1-x)/3ZrxTa2(1-x)/3)O3(BMZT)were prepared by wet chemical method using Ba(OH)2·8H2O,Mg(NO3)2·6H2O,ZrOCl2·8H2O and Ta Cl5 as raw materials,NH3·H2O and C8H6O4 as precipitators.The precursor and calcined nanopowders were characterized by the thermogravimetry and differential thermal analysis,X-ray diffraction,scanning electron microscope,and transmission electron microscope.It is shown that spherical BMZT powders with the particle size of about 0.1μm were obtained by calcining the precursor at 900℃for 3 h.When the additive amount of Zr4+ion reached 10mol%,the prepared Ba(Mg0.3Zr0.1Ta0.6)O3 powders had cubic crystal structure.With the prepared BMZT powder as raw material,translucent Ba(Mg0.3Zr0.1Ta0.6)O3 ceramics were prepared by sintering Ba(Mg0.3Zr0.1Ta0.6)O3 powder at 1550℃for 4 h in O2 atmosphere.The transmittance of the prepared Ba(Mg0.3Zr0.1Ta0.6)O3 ceramics reached about 50%in the range of visible light.

关 键 词：钽镁锆酸钡 半透明陶瓷 氧气烧结 湿化学法 

分 类 号：TQ174.75[化学工程—陶瓷工业]