Title:
FERRITE PARTICLE PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2013/014969
Kind Code:
A1
Abstract:
This ferrite particle production method is characterized by involving: a step for obtaining a slurry by injecting into a medium solution an Mn component raw material and an Fe component raw material adjusted so as to generate ferrite particles having a composition expressed by MnxFe3-XO4 (wherein 0≦X≦1); a step for obtaining granules by spray-drying said slurry; a first firing step for obtaining a precursor by firing said granules in an oxidizing atmosphere; and a second firing step for obtaining a fired product by further firing the obtained precursor within a firing temperature range of 1050-1300°C in a reducing atmosphere. Here, from the viewpoint of further promote roughening of the surface shape of the ferrite particles, the firing temperature in the first firing step is ideally in the range 1150-1300°C, and the firing time is ideally at least 1.5 hours.
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Inventors:
IIDA TOMOHIDE (JP)
OGAWA SHO (JP)
OGAWA SHO (JP)
Application Number:
PCT/JP2012/056956
Publication Date:
January 31, 2013
Filing Date:
March 19, 2012
Export Citation:
Assignee:
DOWA ELECTRONICS MATERIALS CO (JP)
DOWA IP CREATION CO LTD (JP)
IIDA TOMOHIDE (JP)
OGAWA SHO (JP)
DOWA IP CREATION CO LTD (JP)
IIDA TOMOHIDE (JP)
OGAWA SHO (JP)
International Classes:
G03G9/107
Foreign References:
| JPS6148430A | 1986-03-10 | |||
| JP2009086545A | 2009-04-23 | |||
| JP2010108006A | 2010-05-13 | |||
| JPH09269613A | 1997-10-14 |
Attorney, Agent or Firm:
YAMADA SHIGEKI (JP)
Shigeki Yamada (JP)
Shigeki Yamada (JP)
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Claims: