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无机材料学报

无机材料学报

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贱金属电极MLCC用低失真介质陶瓷材料

区毅成; 卢振亚; 陈旭明   

  1. 华南理工大学电子材料科学与工程系, 广州 510640
  • 收稿日期:2004-06-16 修回日期:2004-09-06 出版日期:2005-07-20 网络出版日期:2005-07-20

Low Distortion Dielectric Ceramics for Base-Metal-Electrode MLCC

OU Yi-Cheng; LU Zhen-Ya; CHEN Xu-Ming   

  1. Department of Electronic Materials Science and Engineering; South China University of Technology; Guangzhou 510640; China
  • Received:2004-06-16 Revised:2004-09-06 Published:2005-07-20 Online:2005-07-20

PDF (PC)

1044

被引次数

4

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.

关键词: 贱金属电极, 片式电容器, 低失真, 介质陶瓷

Abstract: A dielectric ceramic with the main phase of (Ca,Sr,Ba)(Zr,Ti)O3 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 BaTiO3 phase. With high dielectric constant(εr: 300~400), low dielectric loss (tgδ ≤30×10-4), 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

Key words: Base-Metal-Electrode, MLCC, low distortion, dielectric ceramics

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