MANUFACTURING METHOD FOR METAL PARTICLES

• Main Authors: YOSHII, AKITO, TAKAHASHI, TOMOYUKI
• Format: Patent
• Language: English; French; German
• Published: 18.09.2013
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CABLES; CASTING; CHEMISTRY; CONDUCTORS; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INSULATORS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

An object is to provide a metal particle which is a non-nucleated, spherical porous material having continuous open pores, and which is formed from dendritic crystals which have grown uniformly outward from the center without requiring a nucleating agent, and a method for producing the same. A method for producing a metal particle comprises the steps of: mixing a metal salt and a polycarboxylic acid in a liquid phase; adding a reducing agent to the resultant mixture to deposit metal particles; and drying the deposited metal particles. The metal particle produced by the method, which is a non-nucleated, spherical porous material having continuous open pores, is unlikely to suffer bonding or aggregation of the metal particles and exhibits excellent dispersibility, and, when the metal particle is used in a conductive composition, such as a conductive paste, a cured product having satisfactory conduction properties can be obtained at a relatively low temperature, making it possible to easily control the specific gravity or resistance.