| 摘要 |
The present invention relates to the field of rare metal smelting, particularly to a tantalum powder for manufacturing a capacitor, preparation method of the tantalum powder and sintered anode made by the same. The BET of an initial powder of the tantalum powder is 3.0-4.5 m2/g; a secondary agglomerated particle has a large particle size; the FSSS particle size is 1.2-3.0 μm; 75% of the tantalum powder is greater than 325 mesh when measured with a standard sieve; the particle size distribution D50 value is greater than 60 μm; the secondary particle size is large; the specific capacitance of a capacitor obtained by sintering the tantalum powder at a temperature of 1200ºC for 20 minutes and then applying a voltage of 20V is from 140,000 to 180,000 μFV/g; and a residual current therethrough is less than 1.0 nA/μFV. Also provided is a method for preparing the tantalum powder economically. |
