影响电容器钽阳极漏电流因素分析

Effect factors analyses of the tantalum powder leakage current

从钽粉纯度和颗粒结构分析了对钽阳极漏电流的影响.结果表明,在低烧结温度和短时间烧结下,降低钽粉金属杂质含量对改善漏电流显得尤为重要.而掺杂剂对漏电流的影响主要取决于掺杂种类.随着氧、碳等气体杂质的增加会增加漏电流,碳含量的影响表现尤为明显,与具有相当纯度和表面积的球形颗粒粉末相比较,片状粉具有较低的漏电流.从而可以通过降低钽粉中主要杂质含量或改变钽粉粒子结构等方法有效降低钽阳极漏电流。

The article mainly from tantalum powder purity and particle structure analysis of tantalum anode leakage current.Results show that in low temperatures and short time sintering,reduce tantalum powder metal impurities in improving the leak is important.While doping agent on the leakage current of impact largely depends on the type of doping.As the gases such as oxygen and carbon impurities will increase the leakage current,the carbon content of expression.And with considerable purity and surface area of spherical particle powder compared,flaky powder has low leakage current.Thus we can reduce the tantalum powder in major impurities or change tantalum powder particle structure and other methods to reduce the tantalum anode leakage current.