COATED COPPER PARTICLE

• Main Authors: FUKUMOTO KUNIHIRO, KOYAMA MASARU
• Format: Patent
• Language: English; Japanese
• Published: 06.10.2016
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CABLES; CASTING; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CONDUCTORS; CORRECTING FLUIDS; DYES; ELECTRICITY; FILLING PASTES; INKS; INSULATORS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; POWDER METALLURGY; PREPARATION OF CARBON BLACK; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; TRANSPORTING; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; USE OF MATERIALS THEREFOR; WOODSTAINS; WORKING METALLIC POWDER

PROBLEM TO BE SOLVED: To provide a coated copper particle having both excellent oxidation resistance and sintering properties, which have been difficult to attain by conventional techniques.SOLUTION: A coated copper particle comprises a copper particle coated with aliphatic carboxylic acid having an aliphatic group with 5 or more carbon atoms, an average primary particle diameter Dbased on SEM observation is 0.02 μm or more and 0.2 μm or less, and a coefficient of variation in particle size distribution (standard deviation SD/average primary particle diameter D) is 0.1 or more 0.5 or less.SELECTED DRAWING: Figure 1-2 【課題】従来技術では達成困難であった、優れた耐酸化性と焼結性とを併せ持つ被覆銅粒子を提供する。【解決手段】炭素数が５以上の脂肪族基を有する脂肪族カルボン酸で被覆された銅粒子を含み、ＳＥＭ観察による平均一次粒子径ＤＳＥＭが０．０２μｍ以上０．２μｍ以下であり、粒度分布の変動係数（標準偏差ＳＤ／平均一次粒子径ＤＳＥＭ）の値が０．１以上０．５以下である被覆銅粒子である。【選択図】図１−２