Metal microparticles and method for producing the same, metal paste containing the metal microparticles, and metal coat made of the metal paste
AssigneeHitachi Cable, Ltd.
InventorsDai ISHIKAWA, Tomiya ABE
Life of this patent
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Abstract
To provide metal microparticles, with less content of alkali metal, halogen, sulfur, and phosphorus as impurities, wherein surfaces thereof are coated with a protective agent, and the protective agent is selected from at least one type of an amine compound and a calboxylic acid compound, and a total content of the alkali metal, halogen, sulfur, and phosphorus contained in the metal microparticles is less than 0.1 mass % relative to a mass of the metal microparticles.
Claims10
Metal microparticles with surfaces coated with a protective agent, wherein the protective agent is selected from at least one type of an amine compound and a carboxylic acid compound, and a total content of alkali metal, halogen, sulfur, and phosphorus contained in the metal microparticles is less than 0.1 mass % relative to a mass of the metal microparticles.
A method for producing metal microparticles, comprising the steps of:
- reducing and precipitating a metal nucleus from a metal compound dispersed in a solid state, in a liquid phase containing a reducing agent and a protective agent, and agglutinating the metal nucleus, and coating the metal nucleus with the protective agent, and generating metal microparticles;
- and
- removing alkali metal, halogen, sulfur, and phosphorus, being impurities contained in the metal microparticles;
- wherein at least one type of an amine compound and a calboxylic acid compound not containing the impurities is used in the generating step, as the reducing agent and the protective agent, and
- a mixed solvent of water and an organic solvent is used in the purifying step,
- so that a total content of the impurities is less than 0.1 mass % relative to a mass of the metal microparticles.
Dependencies are inferred from the claim text.