镍内电极多层陶瓷电容器介质材料的研究  

Study on Dielectric for Ni-Electrode Multilayer Ceramic Capacitors

作　　者：朱文奕 张树人[1] 周晓华 钟朝位[1] 

机构地区：[1]电子科技大学信息材料学院,四川成都610054

出　　处：《功能材料》2000年第3期292-293,共2页Journal of Functional Materials

摘　　要：通过对 (BaO +CaO ) /(TiO2 +ZrO2 )略大于 1的Ba TiO3 系材料进行受主离子Ca2 + 、Mg2 + 、Fe3 + 、Mn2 + 和Zn2 + 掺杂试验 ,使瓷料在还原性气氛中与镍电极共烧 ,获得了介电常数为15 0 0 0、绝缘电阻率达到 10 12 Ω·cm的抗还原陶瓷。研究表明 ,受主离子抑制了BaTiO3 系材料的还原 ,并且在不同还原气氛中受主离子的固溶度会发生变化 ,从而影响材料的介电性能。研制得到的抗还原瓷料可以作为Ni内电极多层陶瓷电容器 (MLC)的介质材料。BaTiO 3-based dielectrics doped with acceptor type ions such as Ca 2+ ,Mg 2+ ,Fe 3+ ,Mn 2+ and Zn 2+ were co-fired with nickel electrode in a reducing atmosphere.When the molar ratio (BaO+CaO)/(TiO 2+ZrO 2) was slightly higher than one,a kind of anti-reduction ceramic could be obtained,which possesed high permittivity of up to 15000 and high resistivity of up to 10 12 Ω·cm.The solubility of these acceptors in different reducing atmospheres and their effects on the properties of the dielectric were discussed.The electrical properties of the dielectric were discussed.The electrical properties of such dielectric are promising for Ni-electrode multilayer ceramic capacitors.

关 键 词：多层陶瓷电容器 镍内电极 介质材料 

分 类 号：TM223[一般工业技术—材料科学与工程] TM534.1[电气工程—电工理论与新技术]