摘要
利用湿化学方法,以碳酸钾和钼酸为原料,聚乙二醇为分散剂和螯合剂,制备了K0.9Mo6O17前驱体。在碳粉保护环境及500℃温度下对所得前驱体进行煅烧后,获得了K0.9Mo6O17粉体。最后,利用此粉体制得了导电陶瓷。借助差示扫描量热仪、XRD、SEM、电化学测试系统等仪器研究了材料的相组成、微观结构及导电性。结果表明,K0.9Mo6O17粉体和陶瓷体均具有单斜晶系结构;该多晶K0.9Mo6O17陶瓷材料的室温电导率达到了0.1S/cm,且其电导率随着温度的升高而升高。利用电子跃迁和晶体场理论对K0.9Mo6O17陶瓷的导电机理进行了分析。
K0.9Mo6O17 precursor was prepared by the wet chemical method, with K2CO3 and H2MoO4 as raw materials, polyethylene glycol as dispersant and chelating agent. After calcining the prepared precursor at 500 ℃ in the carbon –protection environment, K0.9Mo6O17 powder was obtained. K0.9Mo6O17 ceramic was then made from the obtained powder. The phase composition, microstructure and conductivity of the prepared K0.9Mo6O17 powder and ceramic were studied using DSC, XRD, SEM and electrochemical measurement system. The results show that both the K0.9Mo6O17 powder and ceramic exhibit a monoclinic structure. The conductivity of the K0.9Mo6O17 ceramic reaches 0.1 S/cm at room temperature and increases with increasing temperature. The conduction mechanism of the K0.9Mo6O17 ceramic is discussed based on the electron transition and crystal field theories.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2010年第10期1-3,共3页
Electronic Components And Materials
基金
国家自然科学基金(面上)资助项目(No.50872155)
作者简介
李亚玲（1986-），女，湖北利人，研究生，从事功能陶瓷材料研发工作，E-mail：chenxueqin820@163．com。
通讯作者：李志成（1969-），男，江西全南人，教授，博士，从事功能陶瓷材料研发工作，E-mail：zhchli@mail．csu．edu．cn.
