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1. 发明专利

JP2002334803A PERMANENT MAGNET AND MANUFACTURING METHOD THEREFOR 失效
公开(公告)号：JP2002334803A
公开(公告)日：2002-11-22
申请号：JP2001137055
申请日：2001-05-08
申请人： SUMITOMO SPEC METALS
发明人： ODA ETSUSHI , TOYODA YUKIO , HOSOKAWA SEIICHI
IPC分类号： C04B35/26 , H01F1/11 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide ferrite magnet powder which is improved in magnetic properties and manufactured at a low manufacturing cost, a ferrite magnet, and its applied products, and to provide their manufacturing methods. SOLUTION: A ferrite magnet has a hexagonal M-type magnetoplumbite structure, in which Sr, Ba, Pb, or Ca is partially substituted with at least an element selected from among of rare earth elements containing Y and Bi, and Fe is also partially substituted with Cu or Cu and Co. Cu or Cu and Co as substituting elements are wholly or partially added to the ferrite of hexagonal M-type magnetoplumbite structure, in which Sr, Ba, Pb, or Ca has been partially substituted with other elements, and the ferrite loaded with the substituting elements is calcined and/or sintered again. Cu or the like is added to the ferrite, having already, a hexagonal M-type plumbite structure, so that the ferrite can be improved in magnetic properties by the addition of a small amount of loading.

2. 发明专利

JP2001076918A MAGNET POWDER AND MANUFACTURE THEREOF 失效
公开(公告)号：JP2001076918A
公开(公告)日：2001-03-23
申请号：JP28716999
申请日：1999-08-31
申请人： SUMITOMO SPEC METALS
发明人： HOSOKAWA SEIICHI , TOYODA YUKIO
IPC分类号： H01F1/11 , C01G49/00 , C04B35/26 , C04B35/40 , H01F1/113
摘要： PROBLEM TO BE SOLVED: To enhance both saturation magnetization and coersive force by using a ferrite having a hexagonal structure represented by specified SrO, lanthanum- oxide, iron-sesquioxide, titanium-oxide, ZrO, CoO as a main phase. SOLUTION: Powders of SrCO3 and of Fe2O3 are mixed, wherein La2O3, TiO2, ZrO and CoO or the likes are added to the material powder. The mixed material powder is heated at a temperature of 1100-1450 deg.C to obtain a ferrite compound (calcine) by a solid phase reaction. This calcined body represented by (1-x)SrO.(x/2)La2O3.(n-y/2-y/2-y")Fe2O3.yTiO2.y'ZnO.y"CoO, (x,y,y' and y" are mol ratios; 0.1

3. 发明专利

JPH11329826A MANUFACTURE OF ANISOTROPIC PERMANENT MAGNET 失效
公开(公告)号：JPH11329826A
公开(公告)日：1999-11-30
申请号：JP14652098
申请日：1998-05-11
申请人： SUMITOMO SPEC METALS
发明人： TOYODA YUKIO , HOSOKAWA SEIICHI , OKIMOTO KUNIO
IPC分类号： B22F3/02 , C22C38/00 , H01F7/02 , H01F41/02 , B22F3/087
摘要： PROBLEM TO BE SOLVED: To enable complicated shapes and complicated orientations and improve orientation and productivity by forming a mixture of magnetic powder and binder in non-magnetic field, hardening the entirety of a a molded item or a surface thereof alone and performing magnetic field orientation for a molded item which is subjected to hardening treatment in a specified direction. SOLUTION: Magnetic powder whereto binder is added and mixed is molded in non-magnetic field by a molding device without a magnetic circuit. An entirety of a molded item which is molded or a surface thereof alone is so subjected to harden as to allow magnetic powder inside a molded item to flow capable of orienting for making a magnetic field orientation process which facilitates the next process. Then, a molded item which is subjected to hardening is inserted to a magnetic field orientation device and magnetostatic field is applied for orientation. Thereafter, hardening for hardening an inside of a molded item by heating is carried out. In the process, any of thermosoftening resin, thermosetting resin, ultraviolet curing resin and resin having both ultraviolet curing property, and thermosetting property is used as binder.

4. 发明专利

JPH0470100A TRANSPARENT SPEAKER 失效
公开(公告)号：JPH0470100A
公开(公告)日：1992-03-05
申请号：JP18219890
申请日：1990-07-09
申请人： SUMITOMO SPEC METALS
发明人： TOYODA YUKIO
IPC分类号： H04R17/00
摘要： PURPOSE:To obtain a transparent speaker which has superior characteristics by sticking transparent peizoelectric ceramics of a unimorph type or a bimorph type to the thin films of a glass or a plastic. CONSTITUTION:For example, the unimorph type is equipped with transparent electrodes 2 and 3 on the surface and back faces of one circular PLZT 1. And also, the lead part 2a of the transparent electrode 2 on the surface side is arranged on the back face side, insulated with the transparent electrode 3. Both a lead line 5 whose connection edge is formed into a circular part, and which is connected electrically with the transparent electrode 3 on the back face side of the PLZT 1, and a lead line 6 which is connected electrically with the lead part 2a of the transparent electrode 2 on the surface side, both of which are made of transparent electrode materials, are adhered to a rectangular glass thin film diaphragm 4. The transparent electrode 3 and the lead part 2a on the back face side of such unimorph type are stuck to the lead lines 5 and 6 of the glass thin film diaphragm 4, so that a speaker unit for which the glass thin film is used as a primary diaphragm, is completed. Thus, the transparent speaker which has superior characteristics can be obtained.

5. 发明专利

JPS62235923A OPTICAL SHUTTER ELEMENT 失效
公开(公告)号：JPS62235923A
公开(公告)日：1987-10-16
申请号：JP7902386
申请日：1986-04-04
申请人： SUMITOMO SPEC METALS
发明人： TOYODA YUKIO
IPC分类号： G02F1/055 , G02F1/03
摘要： PURPOSE:To reduce the driving voltage and transmission loss of an optical shutter element by sticking an internal electrode to the surface of a substrate having an electro-optical effect, laminating and hardening the substrate coated with the electrodes, insulating the end faces of opposed electrodes every other layer, and then forming external electrodes on the end faces of the insulated layers. CONSTITUTION:The internal electrode layer 13 consisting of Ni or the like is sticked to the substrate 10 consisting of a ceramic material having the electro- optical effect and the bases 10 are laminated and sticked to each other through an adhesive material. The end faces of the layers 13 exposed to the laminated end faces of the laminated body are coated with insulating layers 14 every other layer and the external electrodes 15 for power supply are adhesively formed on the layers 14. On the other hand, ground light transmission faces 21 are formed on the other end faces of the bases 10 of the laminated body. Since an electric field is infiltrated into the whole bases in said constitution, the driving voltage can be reduced and the transmission loss can be reduced because of the expansion of a light transmission area.

6. 发明专利

JP2002313618A PERMANENT MAGNET AND ITS MANUFACTURING METHOD 审中-公开
公开(公告)号：JP2002313618A
公开(公告)日：2002-10-25
申请号：JP2001243821
申请日：2001-08-10
申请人： SUMITOMO SPEC METALS
发明人： ODA ETSUSHI , HOSOKAWA SEIICHI , TOYODA YUKIO
IPC分类号： C04B35/40 , C01G49/00 , C04B35/26 , G11B5/706 , H01F1/10 , H01F1/11 , H01F1/113 , H01F1/34 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide ferrite magnet powder, ferrite magnets, and applied products which are improved in magnetic properties at a low manufacturing cost and methods of manufacturing them. SOLUTION: Ferrite has a hexagonal M-type magnet plumbite structure in which a part of Sr, Ba, Pb, or Ca is substituted with La and at least an element which is selected from Y-containing rare earth elements and Bi, and spinel-structure ferrite and hexagonal W-type magnet plumbite ferrite are added when the above ferrite is micronized, and the micronized mixed powder is formed into a ferrite magnet. A small amount of Co, Ni, Mn, or Zn is added when ferrite having a hexagonal M-type magnet plumbite structure is micronized, so that the ferrite magnet formed of the micronized mixed magnet powder can be improved in magnetic properties.

7. 发明专利

JP2002260908A PERMANENT MAGNET POWDER, MAGNET USING THE SAME, AND METHOD OF MANUFACTURING THEM 失效
公开(公告)号：JP2002260908A
公开(公告)日：2002-09-13
申请号：JP2001058054
申请日：2001-03-02
申请人： SUMITOMO SPEC METALS
发明人： HOSOKAWA SEIICHI , TOYODA YUKIO , ODA ETSUSHI
IPC分类号： C01G49/00 , H01F1/11 , H01F1/113 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a ferrite magnet powder that has improved coercive force and restrain its residual magnetic flux density from deteriorating, and to provide a magnet at a low cost. SOLUTION: This magnetic powder contains hexagonal magnet plumbite ferrite as a main phase where Sr is partially substituted with La, and Fe is partially substituted with Mn or a composite of Mn and Co. The composition of the magnetic powder is represented by a formula, (1-x)SrO.(x/2)La2 O3 .(n-y/2-y'/2)Fe2 O3 .yMnO2 .y'CoO, wherein (x), (y), (y') and (n) indicate mol ratios respectively, and (x), (y), (y') and (n) are so set as to satisfy formulas, 0.03

8. 发明专利

JP2002246216A PERMANENT MAGNET AND ITS MANUFACTURING METHOD 审中-公开
公开(公告)号：JP2002246216A
公开(公告)日：2002-08-30
申请号：JP2001243822
申请日：2001-08-10
申请人： SUMITOMO SPEC METALS
发明人： ODA ETSUSHI , TOYODA YUKIO , HOSOKAWA SEIICHI
IPC分类号： C04B35/40 , C01G49/00 , C04B35/26 , G11B5/706 , H01F1/11 , H01F7/02 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a ferrite magnet powder, a ferrite magnet, and their applied product whose magnetic characteristic is improved at a low manufacturing cost, and to provide their manufacturing method. SOLUTION: A ferrite, which has a hexagonal M-type magnetoplumbite structure that a part of Sr, Ba, Pb or Ca is displaced with at least one kind selected from an rare earth element including Y and Bi and an element always including La, is added with an oxide of Mn or an oxide of Mn and Co during micro crushing, and it is temporarily baked and/or sintered to produce a ferrite magnet. The ferrite that has the hexagonal M-type magnetoplumbite structure is added with a small quantity of Mn or Mn and Co elements during micro crushing, thereby improving its magnetic characteristic.

9. 发明专利

JP2001006912A HARD FERRITE MAGNET AND ITS MANUFACTURE 失效
公开(公告)号：JP2001006912A
公开(公告)日：2001-01-12
申请号：JP17524499
申请日：1999-06-22
申请人： SUMITOMO SPEC METALS
发明人： HOSOKAWA SEIICHI , TOYODA YUKIO
IPC分类号： H01F1/11 , C01G49/00 , C04B35/40
摘要： PROBLEM TO BE SOLVED: To provide a hard ferrite magnet capable of showing sufficiently excellent magnetic characteristic by effectively executing substitution of Fe and Co while loadings of Co is reduced, and a manufacturing method of it. SOLUTION: In this manufacturing method, after each oxide powder of La and Co is added to powder of an SrO.nFe2O3 ferrite magnet which is formed by calcination, a sintering process is performed, and a ferrite magnet having composition of (1-x)SrO.(x/2)La2O3.(n-y/2)Fe3O3NyCoO (0.05

10. 发明专利

JPH11144988A MANUFACTURE OF PERMANENT MAGNET 失效
公开(公告)号：JPH11144988A
公开(公告)日：1999-05-28
申请号：JP32244797
申请日：1997-11-07
申请人： SUMITOMO SPEC METALS
发明人： TOYODA YUKIO , HOSOKAWA SEIICHI , OKIMOTO KUNIO
IPC分类号： H01F41/02 , H02K15/03
摘要： PROBLEM TO BE SOLVED: To produce in high volume a permanent magnet having a complicated shape or a large shape with a simple process, by collecting a plurality of molded bodies with different magnetization, and sintering to integrally form a magnet. SOLUTION: A short cylindrical molding 1 and an annular molded body 2, whose magnetization directions are different, are prepared. Next, the moldings 1 and 2 are assembled together to prepare an assembly. The assembly is sintered in an electric furnace or the like so as to be integrally formed. At this point, the moldings 1 and 2 are made of ferrite powder having at least one of CaO, SiO2 , CoO, Cr2 O3 , Al2 O3 and CuO in amounts ranging from about 0.1 to 2.0 wt.%. The moldings 1 and 2 are molded at molding pressures ranging from about 10 to 1,000 MPa, and they are sintered at temperatures ranging from about 1373 to 1523 K. As a result, a complicatedly shaped or large-sized permanent magnet is produced in high volume inexpensively with a simple process.

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