| 摘要 |
PROBLEM TO BE SOLVED: To provide metal powder composed of tantalum or niobium which has the compatibility of sinterability and fluidity, and to provide a method for producing the same. SOLUTION: The method for producing metal powder comprises: a thermal flocculation stage where raw material powder composed of tantalum or niobium is subjected to thermal flocculation to obtain flocculated powder; and a cracking stage where the flocculated powder is cracked by a cracking machine (roll granulator 20) provided with differential rolls 21. The metal powder is composed of tantalum or niobium, and multiface grains, wherein flat faces are formed at three or more positions on the surface and the ratio of the flat faces is 30 to 70% of the whole surface area. COPYRIGHT: (C)2007,JPO&INPIT
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