IRON-BASED SOFT MAGNETIC POWDER FOR DUST CORE, PREPARATION PROCESS THEREOF, AND DUST CORE

PURPOSE: An iron-based soft magnetic powder for a dust core, a manufacturing method thereof, and the dust core are provided to reduce the coercive force of the ferrous soft magnetic powder by controlling the inclusions of the iron-based soft magnetic powder. CONSTITUTION: An insulating film is forme...

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Bibliographic Details
Main Authors KAMIJO TOMOTSUNA, AKAGI NOBUAKI, MITANI HIROYUKI, HOJO HIROFUMI, CHIBA MASAMICHI
Format Patent
LanguageEnglish
Korean
Published 06.07.2012
Subjects
BASIC ELECTRIC ELEMENTS
CASTING
ELECTRICITY
INDUCTANCES
MAGNETS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
PERFORMING OPERATIONS
POWDER METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
TRANSPORTING
WORKING METALLIC POWDER
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Summary:PURPOSE: An iron-based soft magnetic powder for a dust core, a manufacturing method thereof, and the dust core are provided to reduce the coercive force of the ferrous soft magnetic powder by controlling the inclusions of the iron-based soft magnetic powder. CONSTITUTION: An insulating film is formed on the surface of an iron-based soft magnetic powder. When a cross section of the iron-based soft magnetic powder is observed by a scanning electron microscope, the number of inclusions with an equivalent circuit diameter of 0.1 to 3 um is 1 x 10^4/mm^2 or less. The number of inclusions with an equivalent circuit diameter exceeding 3 um is 10 piceces/mm^2.
Bibliography:Application Number: KR20110143504