| 摘要 |
<p>A niobium sintered body which is prepared in such a manner that a niobium powder is sintered at a temperature of 500°C to 2000°C and allowed to stand at a maximum sintering temperature for 60 minutes to 150 minutes in the course of sintering. The niobium sintered body of the present invention is characterized in that a product (CV) of a capacitance (C) per unit mass and a forming voltage (V) is 90,000 νF.V/g or more, and a value obtained by dividing a product of a mean particle diameter (D¿50?) of a primary particle of said niobium powder and a leakage current (LC) by said CV is 5 x 10?-4 νm.¿νA (νF.V) or less. And there can be provided a well-balanced capacitor with respect to a preferably low leakage current value regardless of the large capacitance, that is, a highly reliable capacitance.</p> |
