SILVER PARTICLE AGGREGATE AND METHOD FOR PRODUCING THE SAME

• Main Authors: TAGUCHI YUTARO, SASAI TATENORI, INUZUKA MASATAKA, KATAYAMA KAZUTAKA, TOYODA HIROTAKA
• Format: Patent
• Language: English; Japanese
• Published: 11.10.2021
• Subjects: CASTING; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; PLASMA TECHNIQUE; POWDER METALLURGY; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OFNEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMICBEAMS; TRANSPORTING; WORKING METALLIC POWDER

To provide a silver particle aggregate having high conductivity and a method for producing the same.SOLUTION: A method for producing a silver particle aggregate includes: a step of preparing a mixed solution obtained by mixing an aqueous solution of silver nitrate and aqueous ammonia (a solution preparation step); a step of irradiating the mixed solution with plasma to generate first silver particles in the mixed solution (a plasma treatment step); a step of aggregating the first silver particles in the mixed solution to form a silver particle aggregate (an aggregation step); a step of extracting the silver particle aggregate from the mixed solution (an aggregate extraction step); and a step of finely granulating the silver particle aggregate (a fine granulation step).SELECTED DRAWING: Figure 4 【課題】 高い導電性を備える銀粒子凝集体とその製造方法を提供することである。【解決手段】 この銀粒子凝集体の製造方法は、硝酸銀水溶液とアンモニア水とを混合した混合溶液を準備する工程（溶液準備工程）と、混合溶液にプラズマを照射して混合溶液中に第１の銀粒子を生成する工程（プラズマ処理工程）と、混合溶液中で第１の銀粒子を凝集させて銀粒子凝集体を生成する工程（凝集工程）と、混合溶液から銀粒子凝集体を抽出する工程（凝集体抽出工程）と、銀粒子凝集体を細粒化する工程（細粒化工程）と、を有する。【選択図】図４