乙二醇溶剂热法制备K_(0.5)Na_(0.5)NbO_3陶瓷粉体  

Preparation of K_(0.5)Na_(0.5)NbO_3 powders by ethylene glycol solvothermal method

作　　者：周媛[1] 蔡艳芝[1] 李玉祥[1] 吴华霞 ZHOU Yuan;CAI Yanzhi;LI Yuxiang;WU Huaxia(College of Materials&Mineral Resources,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055

出　　处：《功能材料》2018年第10期205-210,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51302206);钢铁工业环境保护国家重点实验室开放基金课题资助项目(YZC2017Ky02)

摘　　要：采用乙二醇溶剂热法制备K_(0.5)Na_(0.5)NbO_3陶瓷粉体,系统研究了V(EG)/V(H_2O)、反应温度、前驱液浓度对粉体物相、形貌及颗粒尺寸的影响。结果表明,反应温度230℃,反应时间7h,V(EG)/V(H2O)≤3∶2可获得纯相的K_(0.5)Na_(0.5)NbO_3粉体;温度升高粉体的结晶性变差;当溶液浓度为6mol/L时,粉体出现球形和正方体两种形貌,反应物浓度增大粉体均出现正方体形貌且颗粒尺寸减小,当浓度为10mol/L、V(EG)/V(H2O)=1∶4时,粉体颗粒尺寸最小。The K0.5Na0.5NbO3 powders was prepared through ethylene glycol solvothermal method,the influence of V(EG)/V(H 2O),reaction temperature and precursor concentration on phase、morphology and partical size of K0.5Na0.5NbO3 powders were studied.The results show that:the reaction condition of pure K0.5Na0.5NbO3 powders is achieved that the temperature is 230℃,reaction time is 7 h and V V(EG)/V(H 2O)≤3∶2.the crystallization of powders is poor with the increase of temperature;The powders show Spherical and Cube morphology when the concentration is 6 mol/L;the powders all show cube morphology and the particle size decreased with increasing of reactant concentration,when reactant concentration is 10 mol/L and V(EG)/V(H 2O)=1∶4,the particle size is the smallest.

关 键 词：乙二醇溶剂热K0.5Na0.5NbO3粉体 

分 类 号：TB34[一般工业技术—材料科学与工程]