Patent ID: 7976608
Filing Date: 2011-07-12
Classification: B22F,B23K

Abstract:
1. A method of manufacturing low melting point metal fine particles comprising applying a pressure to a mixture of coarse droplets of a low melting point metal in a molten state and a heat resistant continuous phase liquid of a substance different from the low melting point metal at a temperature of at least the melting point of the low melting point metal, the pressure being at least sufficient to force the mixture to pass through a porous membrane having at least two penetrating pores, thereby forming the coarse liquid metal droplets into fine liquid metal droplets, including controlling the speed of passage of the coarse liquid metal droplets through the membrane such that the mean particle diameter of the resulting fine liquid metal droplets is within a ran -e which is of the same order or smaller than the more diameter of the porous membrane, and then cooling the fine liquid metal droplets and the heat resistant continuous phase liquid to a temperature equal to or lower than the melting point of the low melting point metal to obtain solid metal fine particles.