SINTERED PARTICLES, CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER USING SAME,　AND PRODUCTION METHOD FOR ELECTROPHOTOGRAPHIC DEVELOPER AND SINTERED PARTICLES　

WIPO Patent Application WO/2014/050644

A1

In the present invention, at least two magnetic phases having different coercive forces are formed in sintered particles, and included is metal oxide the melting point of which is 500°C or less. The content of metal oxide is preferably within the range of 0.1-3.0 wt%, and as the metal oxide, boron oxide is preferable. If there are two magnetic phases having different coercive forces, it is preferable for the magnetic phase having the higher coercive force to have a hexagonal crystal structure, and for the magnetic phase having the lower coercive force to have a spinel crystal structure. It is preferable for the magnetic phase having the higher coercive force to be derived from any of strontium ferrite, barium ferrite, calcium ferrite, and lead ferrite, and for the magnetic phase having the lower coercive force to be derived from any of magnetite, manganese zinc ferrite, nickel-zinc ferrite, manganese-magnesium ferrite, lithium ferrite, copper ferrite, and copper-zinc ferrite.

JP2003124035	CORE MATERIAL
JP2020107781	SOFT MAGNETIC METAL POWDER AND MAGNETIC SHEET
JP7405817	Soft magnetic powder and dust core

AKADA KIMIHIRO (JP)

PCT/JP2013/075093

April 03, 2014

September 18, 2013

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DOWA ELECTRONICS MATERIALS CO (JP)
DOWA IP CREATION CO LTD (JP)

H01F1/20; G03G9/107; G03G9/113; H01F1/34

JP2003207950A	2003-07-25
JP2010085761A	2010-04-15
JP2003533743A	2003-11-11
JP2003533745A	2003-11-11
JPH10268575A	1998-10-09
JP2002196540A	2002-07-12

YAMADA SHIGEKI (JP)
Shigeki Yamada (JP)

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