Title:
PROCESS FOR PRODUCING FERROMAGNETIC FINE-PARTICLE EXOTHERMIC ELEMENT
Document Type and Number:
WIPO Patent Application WO/2004/017336
Kind Code:
A1
Abstract:
A process for producing a ferromagnetic fine-particle exothermic element, comprising bringing nuclear fine particles into contact with a treating aqueous solution containing fluorine and iron so as to effect such deposition that iron hydroxide is deposited around the nuclear fine particles to thereby form a layer therearound and thereafter performing such post-treatment that the iron hydroxide layer is heated to thereby be converted to a ferromagnetic layer with the result that a ferromagnetic fine-particle exothermic element having the outer surface of nuclear fine particles coated with the ferromagnetic layer is obtained. In this process, at the time of iron hydroxide deposition, a reaction initiator capable of reacting with hydrogen fluoride is added to the treating aqueous solution.
Inventors:
DOMI SHINJIRO (JP)
SAITO YASUHIRO (JP)
DEKI SHIGEHITO (JP)
SAITO YASUHIRO (JP)
DEKI SHIGEHITO (JP)
Application Number:
PCT/JP2003/009960
Publication Date:
February 26, 2004
Filing Date:
August 05, 2003
Export Citation:
Assignee:
NIPPON SHEET GLASS CO LTD (JP)
DOMI SHINJIRO (JP)
SAITO YASUHIRO (JP)
DEKI SHIGEHITO (JP)
DOMI SHINJIRO (JP)
SAITO YASUHIRO (JP)
DEKI SHIGEHITO (JP)
International Classes:
A61K33/26; A61N1/40; A61N2/02; A61P35/00; A61P43/00; H01F1/36; H01F1/44; A61F7/03; (IPC1-7): H01F1/11; H01F1/36; A61K33/26; A61K41/00; A61P35/00; A61P43/00; A61F7/00; A61N2/00; C01B33/18; H05B6/00
Foreign References:
| JPH09278488A | 1997-10-28 | |||
| JPH08106902A | 1996-04-23 |
Other References:
MASASHI TANAKA ET AL.: "Ekisoho ni yoru gan on'netsu chiryoyo magnetite bishokyu no sakusei", THE CERAMIC SOCIETY OF JAPAN DAI 13 KAI SHUKI SYMPOSIUM KOEN YOKOSHU, 11 October 2000 (2000-10-11), pages 280, XP002975632
Attorney, Agent or Firm:
Kitamura, Shuichiro (Kita-ku Osaka-shi, Osaka, JP)
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