FINE TANTALUM POWDER AND MANUFACTURING METHOD THEREOF

摘要

Provided is a fine tantalum powder. The fine tantalum powder has a D50 < 5 µm, preferably a D50 < 4.5 µm, and an apparent density of 2.0-6.0 g/cm3, preferably 2.2-4.5 g/cm3. Also provided is a method for manufacturing the fine tantalum powder, comprising: 1) providing a sodium reduced tantalum powder as a raw material; 2) sintering the raw material with a high temperature to obtain a sintered block; 3) performing hydrogen decrepitation of the sintered block to obtain a hydrogenated tantalum powder; and 4) dehydrogenating, deoxygenating, pickling, drying and sifting the hydrogenated tantalum powder.