SILVER POWDER AND MANUFACTURING METHOD THEREOF

PROBLEM TO BE SOLVED: To provide silver powder for silver paste, configured to prevent generation of coarse particles and coagulation of particles, and to provide a manufacturing method thereof.SOLUTION: When silver liquid containing a silver complex is mixed with reductant solution to clean and fil...

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Bibliographic Details
Main Authors NIHEI TOMOMICHI, KAWAKAMI YUJI, INOUE MASAHITO
Format Patent
LanguageEnglish
Published 20.06.2013
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
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Summary:PROBLEM TO BE SOLVED: To provide silver powder for silver paste, configured to prevent generation of coarse particles and coagulation of particles, and to provide a manufacturing method thereof.SOLUTION: When silver liquid containing a silver complex is mixed with reductant solution to clean and filter silver particle slurry obtained by reducing the silver complex, and dried thereafter, it is heated and agitated in a rolling agitator in a vacuum atmosphere, pulverization is performed simultaneously. The mean particle size, measured by scanning electron microscopy, is 0.3-2.0 μm. The mean particle size D50 in a volume particle distribution to be obtained by laser diffraction method is 0.5-4.0 μm. The maximum particle size D100 is 15 μm or less. A rate of change in crystallite diameter, which is calculated from a diffraction peak by X-ray diffraction, between before and after pulverization is less than 25%.
Bibliography:Application Number: JP20110271419