A method for the preparation of powder of tantalum solid electrolytic capacitor by use of binder of binary system

摘要

On the preparation of the raw powder of the tantalum solid electrolytic capacitor, the effects for the property of treated powder of particle size and composition of PMMA binder and spray treatment has been studied with thc proposed frequencydifference distribution method. This method is expressed as the difference in frequency of particle size distribution between raw and treated powder.It was found that the mean particle diameter of the treated powder using the binary system of PMMA binder (8250L蘭-1.25%, 1.5μm-0.75%) together with spray pre-treatment is the smallest.The binary system of PMMA binder(8μm-1.25%, 1.5μm-0.75%) is suggested as optimum composition of PMMA binder for the grinding and homogeneity of raw powder. It was shown that the proposed frequency difference distribution method is useful for theanalysis of preparation mechanism of the raw powder.