JP2006083020A - 交流磁場中で発熱する粉末材料およびその製造方法 - Google Patents
交流磁場中で発熱する粉末材料およびその製造方法 Download PDFInfo
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- JP2006083020A JP2006083020A JP2004270013A JP2004270013A JP2006083020A JP 2006083020 A JP2006083020 A JP 2006083020A JP 2004270013 A JP2004270013 A JP 2004270013A JP 2004270013 A JP2004270013 A JP 2004270013A JP 2006083020 A JP2006083020 A JP 2006083020A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/009—Compounds containing, besides iron, two or more other elements, with the exception of oxygen or hydrogen
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/40—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals
- A61N1/403—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals for thermotherapy, e.g. hyperthermia
- A61N1/406—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals for thermotherapy, e.g. hyperthermia using implantable thermoseeds or injected particles for localized hyperthermia
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/0018—Mixed oxides or hydroxides
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- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/0018—Mixed oxides or hydroxides
- C01G49/0036—Mixed oxides or hydroxides containing one alkaline earth metal, magnesium or lead
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N2/00—Magnetotherapy
- A61N2/02—Magnetotherapy using magnetic fields produced by coils, including single turn loops or electromagnets
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/42—Magnetic properties
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- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
- Compounds Of Iron (AREA)
Abstract
【解決手段】一般式:Mg1-xAxFe2O4(ただし、式中のAは、Ca、Sr、Baからなる群から選択された少なくとも一種の元素であり、式中のxの範囲は、0.05≦x≦0.95である。)で表される粉末材料である。
前記一般式中のxの範囲が、0.2≦x≦0.8であることが好ましい。
また、前記粉末材料中の(440)面の結晶子の大きさが80〜200Åであることが好ましい。
【選択図】 図1
Description
式中のxの値は、Mgを置換する元素Aの組成比を示す。ここで、元素AはCa、Sr、Baからなる群から選択された少なくとも一種の元素である。xが0.05よりも小さいか、またはxが0.95を上回ると、Mgを元素Aにより置換する効果が得られない。
本発明に係る粉末材料を製造するためには、まず、例えば、MgCl2・6H2Oなどのマグネシウム塩、CaCl2などのカルシウム塩、FeCl3・6H2OなどのFe(III)塩を水などに溶解し、アルカリにより水酸化物などとして共沈させ、前駆体を得る。そして、これを濾過し、該前駆体を所定の温度で焼成することにより本発明に係る粉末材料を製造することができる。
加温療法に本発明に係る粉末材料Mg1-xAxFe2O4を使用する際には、Mg1-xAxFe2O4の組成を有する純粋なフェライトのみからなることが、加温療法に用いる当該材料の使用量を減らす点で望ましいが、未反応物質や副反応物を多く含む混合物であってもよい。また、有機物などの接合剤を混合し、針状などの所定の形状に成型したり、生体との親和性を高めるために有機物などで被覆したりして用いることもできる。
Claims (5)
- 一般式:Mg1-xAxFe2O4(ただし、式中のAは、Ca、Sr、Baからなる群から選択された少なくとも一種の元素であり、式中のxの範囲は、0.05≦x≦0.95である。)で表されることを特徴とする粉末材料。
- 前記一般式中のxの範囲が、0.2≦x≦0.8であることを特徴とする請求項1に記載の粉末材料。
- (440)面の結晶子の大きさが80〜200Åであることを特徴とする請求項1または2に記載の粉末材料。
- 一般式:Mg1-xAxFe2O4(ただし、式中のAは、Ca、Sr、Baからなる群から選択された少なくとも一種の元素であり、式中のxの範囲は、0.05≦x≦0.95である。)で表される粉末材料の製造方法であって、Mg、元素AおよびFeを溶解した水溶液から、Mg、元素AおよびFeの水酸化物を共沈させる工程と、前記共沈させた水酸化物を700〜900℃の温度で焼成する工程と、を有することを特徴とする粉末材料の製造方法。
- 前記一般式中のxの範囲が、0.2≦x≦0.8となるようにすることを特徴とする請求項4に記載の粉末材料の製造方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004270013A JP3867091B2 (ja) | 2004-09-16 | 2004-09-16 | 交流磁場中で発熱する粉末材料およびその製造方法 |
EP05781414A EP1808413A1 (en) | 2004-09-16 | 2005-09-02 | Powder material generating heat in ac magnetic field and method for producing same |
US11/575,467 US20080260620A1 (en) | 2004-09-16 | 2005-09-02 | Powder Material that Generates Heat in an Alternating Current Magnetic Field and the Manufacturing Method Thereof |
PCT/JP2005/016149 WO2006030655A1 (ja) | 2004-09-16 | 2005-09-02 | 交流磁場中で発熱する粉末材料およびその製造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004270013A JP3867091B2 (ja) | 2004-09-16 | 2004-09-16 | 交流磁場中で発熱する粉末材料およびその製造方法 |
Publications (2)
Publication Number | Publication Date |
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JP2006083020A true JP2006083020A (ja) | 2006-03-30 |
JP3867091B2 JP3867091B2 (ja) | 2007-01-10 |
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JP2004270013A Expired - Fee Related JP3867091B2 (ja) | 2004-09-16 | 2004-09-16 | 交流磁場中で発熱する粉末材料およびその製造方法 |
Country Status (4)
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US (1) | US20080260620A1 (ja) |
EP (1) | EP1808413A1 (ja) |
JP (1) | JP3867091B2 (ja) |
WO (1) | WO2006030655A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009215384A (ja) * | 2008-03-07 | 2009-09-24 | Ishihara Sangyo Kaisha Ltd | 黒色顔料及びその製造方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US8431692B2 (en) | 2008-06-06 | 2013-04-30 | Quark Pharmaceuticals, Inc. | Compositions and methods for treatment of ear disorders |
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JPS57118019A (en) * | 1981-01-14 | 1982-07-22 | Agency Of Ind Science & Technol | Manufacture of miio-m2iiio3 powder |
JP3494193B2 (ja) * | 1996-02-02 | 2004-02-03 | キヤノン株式会社 | 画像形成方法 |
JP4055448B2 (ja) * | 2002-03-27 | 2008-03-05 | 戸田工業株式会社 | 球状フェライト粒子、その製造方法及び該球状フェライト粒子からなる電子写真現像用キャリア |
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2004
- 2004-09-16 JP JP2004270013A patent/JP3867091B2/ja not_active Expired - Fee Related
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2005
- 2005-09-02 WO PCT/JP2005/016149 patent/WO2006030655A1/ja active Application Filing
- 2005-09-02 EP EP05781414A patent/EP1808413A1/en not_active Withdrawn
- 2005-09-02 US US11/575,467 patent/US20080260620A1/en not_active Abandoned
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009215384A (ja) * | 2008-03-07 | 2009-09-24 | Ishihara Sangyo Kaisha Ltd | 黒色顔料及びその製造方法 |
Also Published As
Publication number | Publication date |
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EP1808413A1 (en) | 2007-07-18 |
JP3867091B2 (ja) | 2007-01-10 |
US20080260620A1 (en) | 2008-10-23 |
WO2006030655A1 (ja) | 2006-03-23 |
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