Preparation method of anode tantalum block for reducing loss angle tangent value of tantalum capacitor

Abstract

The invention provides a preparation method of an anode tantalum block for reducing a loss angle tangent value of a tantalum capacitor. The method comprises the following steps of (1) selecting tantalum powder for molding the anode tantalum block; (2) designing formation voltage or lower limit compaction density of the anode tantalum block and designing corresponding specification parameters; (3) utilizing the tantalum powder selected in the step (1) and carrying out pressing according to the related parameters in the step (2) to form the anode tantalum block; and (4) carrying out vacuum sintering on the molded anode tantalum block. The interaction of tantalum powder particles at a high temperature is reduced by reducing the actual density of a corresponding specification of product or reducing the sintering temperature of the product and increasing the porosity between the tantalum powder particles, and capacity lead-out is better, so that the loss angle tangent value of the non-solid tantalum electrolytic capacitor is effectively reduced; the ripple current withstanding ability is improved; and production and manufacturing guarantees are provided for the high-reliability requirements of the market on this type of product.

Description

technical field [0001] The invention belongs to the technical field of manufacturing non-solid electrolyte tantalum capacitors, and in particular relates to a method for preparing an anode tantalum block that reduces the loss tangent value of a tantalum capacitor. Background technique [0002] Non-solid electrolyte tantalum capacitors are being widely used in military fields such as aviation, aerospace, ships, and rockets. With the development and deepening of the industrial revolution, the precision requirements for components are becoming more and more stringent. As an important member of components, The accuracy requirements of capacitors are becoming more and more stringent, especially for non-solid tantalum electrolytic capacitors. Since such products are generally used as filter capacitors, the ripple voltage or ripple current they withstand will be relatively large, and the reactive power will A large amount of heat is generated by the action of power. If the heat is ...

AI Technical Summary

Problems solved by technology

[0002] Non-solid electrolyte tantalum capacitors are being widely used in military fields such as aviation, aerospace, ships, and rockets. With the development and deepening of the industrial revolution, the precision requirements for components are becoming more and more stringent. As an important member of components, The accuracy requirements of capacitors are becoming more and more stringent, especially for non-solid tantalum electrolytic capacitors. Since such products are generally used as filter capacitors, the ripple voltage or ripple current they withstand will be relatively large, and the reactive power will A large amount of heat is generated by the action of power. If the heat is too large, it will affect the normal use of the capacitor, and further affect the normal operation of the entire circuit.