Suppressive effect of Ni–Sn internal electrode at the anode on the leakage current degradation of BaTiO3-based multilayer ceramic capacitors
Suppressive effect of Ni–Sn internal electrode at the anode on the leakage current degradation of BaTiO3-based multilayer ceramic capacitors
复制标题
阳极Ni-Sn内电极对BaTiO3基多层陶瓷电容器漏电流衰减的抑制作用
DOI：
10.1063/5.0044408
复制
发表时间：
2021
影响因子：
4
通讯作者：
H. Sano
中科院分区：
文献类型：
--
作者：
Shoichiro Suzuki;S. Yamaguchi;Akitaka Doi;Akihiro Shiota;N. Iwaji;S. Abe;Makoto Matsuda;Tomoyuki Nakamura;H. Sano
随着多层陶瓷电容器（mlcc）的BaTiO3介电层变薄，泄漏电流退化问题也随之出现。在本研究中，研究了镍锡内电极放置在阳极和阴极两种情况下的泄漏电流退化。在阳极处使用镍锡内电极的mlcc对泄漏电流随时间退化的抑制效果明显优于在阴极处使用的mlcc。Ni和Ni - sn内电极的泄漏电流类型分别为隧道型和肖特基型或普尔-弗伦克尔型。高分辨率扫描透射电镜显示，在Ni-Sn内电极与BaTiO3的界面处存在一层高浓度的Sn界面层。因此，电极在阳极处的界面对mlcc的泄漏电流随时间的衰减起着重要的作用。
As the BaTiO3 dielectric layer of multi-layer ceramic capacitors (MLCCs) becomes thinner, the problem of leakage current degradation arises. In this study, the leakage current degradation was investigated for the cases when the Ni–Sn internal electrode was placed at either the anode or the cathode. The MLCCs with the Ni–Sn internal electrode at the anode suppressed the leakage current degradation with time significantly better than that at the cathode. The leakage current types for the degraded MLCCs were tunnel and Schottky or Poole–Frenkel for the Ni and Ni–Sn internal electrodes, respectively. High-resolution scanning transmission electron microscopy revealed an interface layer with a high Sn concentration at the interface between the Ni–Sn internal electrode and BaTiO3. Therefore, the interface of the electrode at the anode plays an important role in the leakage current degradation of MLCCs with time.