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首页> 外文期刊>Journal of the Korean Ceramic Society >Characterizing electrical breakdowns upon reoxidation atmosphere for reliable multilayer ceramic capacitors
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Characterizing electrical breakdowns upon reoxidation atmosphere for reliable multilayer ceramic capacitors

机译：描述电器故障时为可靠的多层再氧化气氛陶瓷电容器

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Electrical breakdowns of multilayer ceramic capacitors (MLCCs) manifest an increase in leakage current and are characterized as a function of atmospheric reoxidation. The atmospheric reoxidation is controlled with respect to the theoretical oxygen partial pressure for the oxidation of Ni internal electrodes. The breakdowns are characterized by a Maxwell-Wagner polarization technique, which dominantly exhibits space-charge-limited and Poole-Frenkel currents for all measured samples. The threshold voltage for the transition between these two conduction modes is suggested as an index for the robustness of the grain boundary resistance of BaTiO3; therefore, the breakdown voltage. The reoxidation atmosphere, which prevents the Ni oxidation, increases the threshold voltage, dramatically enhancing the breakdown voltage and insulation resistance. Impedance spectroscopy and scanning transmission electron microscopy-energy-dispersive X-ray spectroscopy reveal that the cation distribution throughout BaTiO3 grains and grain boundaries changes during the reoxidation, including Ni cations from the internal electrodes, which affects the grain boundary resistance and determines the breakdown voltage of MLCCs with Ni internal electrodes. These observations emphasize that the reoxidation should be concurrently optimized in terms of the cation redistribution and elimination of oxygen vacancies.
机译：多层陶瓷电气故障电容(mlcc)明显增加泄漏电流作为特征大气再氧化的功能。控制大气再氧化对氧气的理论部分氧化镍的内部压力电极。Maxwell-Wagner极化技术,主要展览空间电荷限制和Poole-Frenkel电流测量样本。阈值电压之间的过渡这两个建议作为传导模式对晶界的鲁棒性指数钛酸钡的阻力;电压。防止镍氧化,增加了阈值电压,显著提高击穿电压和绝缘电阻。阻抗光谱和扫描透射电子microscopy-energy-dispersive x射线光谱分析表明,阳离子分布在钛酸钡颗粒和晶粒边界变化的再氧化,包括倪阳离子从内部电极,它对晶界电阻和影响决定了mlcc的击穿电压与倪内部电极。同时,再氧化应该优化的阳离子再分配和消除氧空缺。

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