Preparation and Properties of CCTO-BCTO Ceramics with Ultrahigh Dielectric Constant

摘要：

　　Ceramics of (1-x)CaCu3Ti4O12-xBi2/3Cu3Ti4O12,i.e.,CCTO-BCTO,with x=0,0.01,0.1 and 0.25,respectively,were prepared via the conventional solid-state reaction.The phase structure of the ceramics was identified by X-ray diffraction.The microstructure of the sample was observed with scanning electron microscopy.Dielectric properties and impedance spectroscopy were measured using a LCR Meter,in which 0.9CCTO-0.1BCTO displayed highest dielectric constant (584108) and lowest dielectric loss (0.42) at lkHz among the four kinds of specimens.Based on series of experimental results,an optimum amount of x was able to improve the dielectric properties of CCTO-BCTO,through adjusting the impedance characteristics of the grain and grain boundary.

关键词： Ceramics Dielectric properties Impedance spectroscopy

作者: La Chen Wei Li Zhaoxian Xiong Chunxiao Song Hong Qiu

作者单位: College of Materials,Xiamen University,Xiamen 361005,PR China

会议类型: 国际会议

会议名称: 2013 2nd international Conference on Opto-Electronics Engineering and Materials Eesearch(2013第二届光电工程与材料研究国际会议)(OEMR2013)

会议地点: 郑州

会议语种:英文

页码: 2051-2054

在线出版日期: 2013-10-19（万方平台首次上网日期，不代表论文的发表时间）