ANODE BODY FOR TUNGSTEN CAPACITORS

摘要

An anode body for an electrolytic capacitor, prepared by sintering a tungsten powder to obtain a sintered body and subjecting the obtained sintered body to chemical conversion to form a dielectric layer comprising a tungsten trioxide compound on the surface of the sintered body, wherein the ratio of the hydration water in the tungsten trioxide compound becomes one molecule or less to 10 molecules of the tungsten trioxide compound. Use of the anode body of the present invention enables production of a tungsten capacitor, which is reduced in the capacitance change due to DC voltage (bias dependency).

主权项

1. An anode body for a capacitor, wherein a dielectric layer comprising a tungsten trioxide compound is formed on the surface of the anode body, and the ratio of the hydration water in the tungsten trioxide compound is one molecule or less to 10 molecules of the tungsten trioxide compound.