贱金属电极MLCC用低失真介质陶瓷材料  

Low Distortion Dielectric Ceramics for Base-Metal-Electrode MLCC

作　　者：区毅成[1] 卢振亚[1] 陈旭明[1] 

机构地区：[1]华南理工大学电子材料科学与工程系,广州510640

出　　处：《无机材料学报》2005年第4期1007-1012,共6页Journal of Inorganic Materials

基　　金：广东省"十五"重大科技专项资助项目(A1060303)

摘　　要：在还原气氛下,烧制出一种主晶相为(Ba,Ca,Sr,)(Zr,Ti)O3介质陶瓷材料. XRD 相成分分析发现:合理的工艺方法可获得不含强铁电相的介质材料.该介质材料具有较高的介电系数(εr为300-400,),较低介质损耗(tgδ≤30×10-4),直流偏压下电容量变化小(偏压为2.5kV/mm时变化约0.03%),且介电系数温度特性符合EIA标准之X7R特性的要求等特点, 适用于制作低失真贱金属电极MLCC.A dielectric ceramic with the main phase of (Ca,Sr,Ba)(Zr,Ti)03 was successfully sintered in reducing atmosphere. The crystal phases were analyzed by the XRD method. A proper synthesis process was used to obtain the dielectric material without ferroelectric BaTiO(3) phase. With high dielectric constant(E(r): 300 similar to 400), low dielectric loss (tg delta <= 30 x 10(-4)), low capacitance changes under DC bias (about 0.03% when the dc bias is 2.5kV/mm), the dielectric material is applicable for low distortion base-metal-electrode MLCC.

关 键 词：贱金属电极 片式电容器 低失真 介质陶瓷 

分 类 号：TQ174[化学工程—陶瓷工业]