SILVER-COATED NICKEL PARTICLES AND METHOD OF MANUFACTURING THE SAME

• Main Authors: SASAKI TAKASHI, AOKI SHINJI, KODAIRA TOSHIHIRO, MINOWA HIKARI
• Format: Patent
• Language: English; Japanese
• Published: 20.11.2014
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CASTING; CONDUCTORS; ELECTRICITY; INSULATORS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; TRANSPORTING; WORKING METALLIC POWDER

PROBLEM TO BE SOLVED: To provide silver-coated nickel particles having high electrical conduction among particles.SOLUTION: The silver-coated nickel particles of the present invention are formed by coating silver on the surface of core particles containing nickel. A large number of convex parts is formed on the entire surface of the silver-coated nickel particles, by which the surface is in an irregular shape. A size of the convex parts in plan view is 0.05 μm or more and 1 μm or less. Coverage of silver in the silver-coated nickel particles is 50% or more. It is preferable that a volume cumulative particle diameter Din cumulative volume at 50 vol.% by a laser diffraction scattering type particle size distribution measurement method is 0.5 μm or more and 100 μm or less. 【課題】粒子間の電気的導通が高い銀コートニッケル粒子を提供すること。【解決手段】本発明の銀コートニッケル粒子は、ニッケルを含むコア粒子の表面に銀が被覆されてなる。銀コートニッケル粒子は、その表面の全域にわたって、多数の凸部が形成されており、それによって前記表面は凹凸形状をしている。平面視での前記凸部の大きさが０．０５μｍ以上１μｍ以下である。銀コートニッケル粒子中の銀の被覆率は５０％以上である。レーザー回折散乱式粒度分布測定法による累積体積５０容量％における体積累積粒径Ｄ50が０．５μｍ以上１００μｍ以下であることが好適である。【選択図】図１