FINE METAL PARTICLE, PROCESS FOR PRODUCING THE SAME, DISPERSION OF FINE METAL PARTICLES, AND PROCESS FOR PRODUCING THE SAME

• Main Authors: YAMAMOTO, KAZUNORI, MACHII, YOUICHI, YASUDA, EITARO, YOKOZAWA, SHUNYA, ONISHI, AYU, KAWASAKI, MITSUO, KUMASHIRO, YASUSHI, EJIRI, YOSHINORI, KIMURA, SHIGEYUKI, WADA, MASASHI, KAJITA, OSAMU, IWAMOTO, TAKAFUMI
• Format: Patent
• Language: English; French; Japanese
• Published: 25.09.2008
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CABLES; CASTING; CHEMISTRY; CONDUCTORS; DYES; ELECTRICITY; INSULATORS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; 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; WORKING METALLIC POWDER

A process for producing fine metal particles of nano size which are dispersed in an organic solvent without the aid of any surfactant, etc. and for producing the dispersion. The process, which is for producing fine metal particles or a dispersion thereof, comprises the steps of dispersing a metal compound in a non-reducing organic solvent and then irradiating the metal compound in this organic solvent with a laser light while stirring the dispersion. The fine metal particles each has a core/shell structure in which the core is a metal and the shell is a metal oxide. L'invention concerne un procédé de production de particules métalliques fines nanométriques qui sont dispersées dans un solvant organique sans utiliser de tensioactif, etc. et un procédé de production de la dispersion. Le procédé de production des particules métalliques fines ou d'une dispersion de celles-ci comprend les étapes consistant à : disperser un composé métallique dans un solvant organique non réducteur, et irradier ensuite le composé métallique dans ce solvant organique à l'aide de lumière laser en agitant la dispersion. Ces particules métalliques fines comportent chacune une structure coer-enveloppe dans laquelle le coer est un métal et l'enveloppe est un oxyde métallique.