Valve acting metal sintered body, production method therefor and solid electrolytic capacitor

Abstract

The invention provides a valve-acting metal sintered body for anode of a solid electrolytic capacitor, having a high capacitance, well impregnated with cathode material, and exhibiting excellent properties particularly when having a large volume, a capacitor having a low ESR, an excellent tan δ value and good long-term reliability such as moisture resistance and heat resistance by using the sintered body, and a production method therefor comprising the following steps: coating/printing/shaping a granulated product of a mixed dispersion containing a pore-forming agent, an organic binder and a primary powder or secondary aggregated powder of at least one member selected from valve-acting metal, a valve-acting metal compound and a valve-acting metal alloy or a granulated powder thereof, and a solvent, or compressing and shaping the granulated product of a mixture obtained by removing the solvent from the dispersion; sintering the shaped article containing a pore-forming agent; and removing the pore-forming agent from the sintered body.