流延法制备片式CaCu_3Ti_4O_(12)陶瓷及其性能研究(英文)  

Preparation and Electrical Properties of CaCu_3Ti_4O_(12) Thin Ceramic Sheets via Water-based Tape Casting

作　　者：李伟[1] 熊兆贤[1] 薛昊[1] 

机构地区：[1]厦门大学材料学院,厦门361005

出　　处：《无机材料学报》2014年第11期1228-1232,共5页Journal of Inorganic Materials

基　　金：Fundamental Research Funds for the Central Universities(2010121052);National Natural Science Fund of China(51202204)

摘　　要：片式CaCu3Ti4O12陶瓷由于其巨介电效应,用于制备多层陶瓷片式电容具有重大意义。通过水基流延法并在不同的烧结温度下制备的片式CaCu3Ti4O12陶瓷具有优异的介电性能。其中在1080℃下烧结的样品在保持巨电容率(98605)的同时,降低了介电损耗,其值只有0.028,远低于其他报道的损耗值。同时,测试了CCTO陶瓷薄片的复阻抗图谱,讨论了CCTO陶瓷的特殊的电学性能。实验结果表明,通过流延成型制备的CCTO陶瓷薄片在保持巨电容率的同时具有很低的介电损耗,这为CCTO陶瓷在微电子工业上的应用提供了可能性。Thin ceramic sheet of CaCu3Ti4O12 has a great significance for preparation of multiplayer ceramic chip capacitors. In this work, a simple plan was made to achieve CaCu3Ti4O12 thin ceramic sheets with excellent dielectric properties. Thin ceramic sheets of CaCu3Ti4O12 were prepared via water-based tape casting at various sintering temperatures. The CaCu3Ti4O12 samples sintered at 1080℃ exhibit a great performance on dielectric properties with high permittivity（εr=98605） and low dielectric loss（tanδ=0.028） which are better than those of samples prepared by conventional dry pressing. Meanwhile, the complex impedance spectra were measured to explain the mechanism of special electrical behaviors of CaCu3Ti4O12 ceramics. These testing results indicate that the CaCu3Ti4O12 ceramics via tape casting exhibits a better performance of giant permittivity and lower dielectric loss than other reports, which provides a possibility for the application of the CaCu3Ti4O12 in modern micro-electronics technology.

关 键 词：钙钛矿 流延法 介电性能 晶界 

分 类 号：TQ174[化学工程—陶瓷工业]