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1. 发明专利

JP2001110599A MAGNET FOR INSERT LIGHT SOURCE AND MAGNETIZING METHOD FOR MAGNET 失效
公开(公告)号：JP2001110599A
公开(公告)日：2001-04-20
申请号：JP28851599
申请日：1999-10-08
申请人： SHINETSU CHEMICAL CO
发明人： OHASHI TAKESHI
IPC分类号： H05H13/04 , H05H7/04
摘要： PROBLEM TO BE SOLVED: To offer a short cycle insert light source of cycle length less than 10 mm having excellent magnetic field accuracy and magnet position accuracy, and to offer a magnetizing method for that magnet. SOLUTION: Gaps of 0.1-1 mm are periodically provided at the gap direction magnetized magnet block. This magnet block 1 is magnetized by the pulse magnetic field. The magnetic field corresponding to more than one cycle is generated by a couple of these magnet blocks. The magnet for insert light source has feature of forming by facing the plural magnet blocks.

2. 发明专利

JP2001078402A SINTERED PERMANENT MAGNET FORMED BY SINTERING RARE- EARTH MATERIAL AND PERMANENT MAGNET TYPE SYNCHRONOUS MOTOR 失效
公开(公告)号：JP2001078402A
公开(公告)日：2001-03-23
申请号：JP2000198015
申请日：2000-06-30
申请人： SHINETSU CHEMICAL CO
发明人： OHASHI TAKESHI
IPC分类号： H01F1/08 , H02K1/27 , H02K15/03
摘要： PROBLEM TO BE SOLVED: To provide a synchronous motor having reduced generation of eddy currents. SOLUTION: This sintered material is provided with slits 1, 2 at both an upper surface 3 and a lower surface 4. The slit provided at one of these surface is different in the direction on the surface from the slip provided at the other surface. Moreover, the sum of the depth of the deepest slits respectively at the upper and lower surfaces ranges from 1 to 5/3 times the length between the upper surface and lower surface. This sintered material is built into a rotor.

3. 发明专利

JP2001018219A METHOD FOR CUTTING OBJECT TO BE CUT 失效
公开(公告)号：JP2001018219A
公开(公告)日：2001-01-23
申请号：JP19549599
申请日：1999-07-09
申请人： SHINETSU CHEMICAL CO
发明人： KANEKO HIDEO , OHASHI TAKESHI
IPC分类号： B26F3/00 , B28D1/28
摘要： PROBLEM TO BE SOLVED: To achieve the cutting of an object to be cut without buckling even when a thin sample is cut by cutting such an object, with an anti-warpage member attached to both side faces of the object, when a conductor is wound around a spot to be cut of the object and a pulsed magnetic field is applied to cut the object. SOLUTION: When an object 4 to be cut is cut, first a groove is formed along a spot to be cut on the circumferential face of the object 4 and a conductor 5 is wound around the groove. Next a silicone disc is attached as an anti- warpage member to both side faces of the object 4 using an adhesive, and then the center axis of the object 4 is made to coincide with the center axis of a primary coil 3. Further, the primary coil 3, the object 4 and the conductor 5 are arranged in such a way that these are not brought into contact electrically with each other. After that, voltage is applied to a capacitor 1 and a switch 2 is made to run current to the primary coil 3. Thus the object 4 is cut at the spot to be cut. Even when a thin sample is cut, it can be cut without bucking or braking in pieces.

4. 发明专利

JP2000353612A ANISOTROPIC RARE-EARTH PERMANENT MAGNET AND MANUFACTURE THEREOF 失效
公开(公告)号：JP2000353612A
公开(公告)日：2000-12-19
申请号：JP16656599
申请日：1999-06-14
申请人： SHINETSU CHEMICAL CO
发明人： NOMURA TADAO , OHASHI TAKESHI
IPC分类号： H01F1/053 , C22C38/00 , H01F1/055 , H01F1/057 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To obtain an anisotropic rare-earth permanent magnet, having a texture such that hard magnetic phases and soft magnetic phases are finely scattered and the axes of easy magnetization of the hard magnetic phases are oriented. SOLUTION: In a method for manufacturing an anisotropic rare-earth permanent magnet, having an internal texture such that hard magnetic phases and soft magnetic phases are finely scattered, an alloy material which is obtained from a quenched thin belt having a composition that can yield hard magnetic phases, soft magnetic phases, and nonmagnetic phases having a melting point lower than that of the magnetic phases have when heat-treated is heat-treated to a temperature higher than the melting point of the nonmagnetic phases or the temperature, at which eutectic crystals occur between the nonmagnetic phases and the other phases, in a state where the belt is pressurized in one axial direction.

5. 发明专利

JP2000294415A RARE EARTH PERMANENT MAGNET AND MANUFACTURE THEREOF 失效
公开(公告)号：JP2000294415A
公开(公告)日：2000-10-20
申请号：JP9735599
申请日：1999-04-05
申请人： SHINETSU CHEMICAL CO
发明人： OHASHI TAKESHI
IPC分类号： H01F1/053 , B22F3/00 , H01F1/059 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a bulk-formed rare-earth permanent magnet mainly composed of SM2, Fe17 and N3 phases and to provide a manufacturing method of the permanent magnet. SOLUTION: This rear earth permanent magnet can be obtained by containing R (one or two or more kids of material which are mainly composed of Sm of Y-containing rare earth elements) excluding inevitable impurities, Fe (or Fe+Co), and N, having the main phase of Th2Zn17 type rhombohedral crystal structure and mutual density of 90% or higher, and by having a bulk state by performing hot uniaxial or biaxial pressing.

6. 发明专利

JPH11241127A METHOD FOR RECOVERING ALLOY SCRAP CONTAINING RARE EARTH METAL 失效
公开(公告)号：JPH11241127A
公开(公告)日：1999-09-07
申请号：JP4663698
申请日：1998-02-27
申请人： SHINETSU CHEMICAL CO
发明人： MAKINO YUICHI , TODE TAKASHI , OHASHI TAKESHI
IPC分类号： C22B5/04 , C22B7/00 , C22B9/02
摘要： PROBLEM TO BE SOLVED: To surely and economically recover an alloy which has reduced impurities, by melting an alloy scrap containing rare earth metals by charging into a melting furnace, recovering the solidified alloy from the lower part and gradually lowering and separating the impurities of oxides, etc., from the alloy. SOLUTION: It is desirable that a heating method in the melting furnace is to use any method among an arc melting, plasma melting, electron beam melting or electro slag melting and the alloy containing the rare earth metals is a magnet alloy, hydrogen storage alloy or super magnetostrictive alloy. The alloy scrap and fluoride of the rare earth element, fluoride of alkaline earth metal and/or fluoride of alkali metal, are mixedly melted, and it is desirable to contain the rare earth metal in which metal Ca is mixed in these fluorides. As for the alloy scrap containing the rare earth metal, concretely, Nd-Fe-B base alloy, La-Ni base alloy and Tb-Dy-Fe base alloy are exemplified.

7. 发明专利

JPH1012432A VARIABLE MAGNETIC FIELD TYPE MAGNETIC CIRCUIT 失效
公开(公告)号：JPH1012432A
公开(公告)日：1998-01-16
申请号：JP18538296
申请日：1996-06-26
申请人： SHINETSU CHEMICAL CO
发明人： OHASHI TAKESHI
IPC分类号： H05H1/46 , H01F7/02
摘要： PROBLEM TO BE SOLVED: To make the intensity of magnetic field variable in a wide range by being comprised of a permanent magnet which is provided rotatably or movably and a magnetic yoke which has a linear part with a permanent magnet in its midway and an air gap at other predetermined position and allowing the permanent magnet to rotate or move so as to make a magnetic field in the air gap of the magnetic yoke to be vaiable. SOLUTION: A columnar permanent magnet 2 is rotated and driven on a columnar axis as a center, and a magnetic yoke 1 is provided with a linear part 1a with the magnet interposed in its midway and an air gap 4 with a predetermined spacing in the other part. Then, a magnetic flux generating from the magnet 2 at the time when the magnetizing direction of the magnet 2 is clockwise, passes through the yoke 1 and leaks to the air gap 4 of the yoke 1, forming a closed magnetic circuit for returning to the counter pole of the magnet 2. At this point, the intensity of magnetic field of the air gap 4 becomes the maximum. Further, as the magnet 2 is rotated gradually in its magnetizing direction, the flow of magnetic flux in the closed magnetic circuit becomes small gradually, and when the magnetizing direction becomes at 90 degrees against the closed magnetic circuit, the intensity thereof becomes zero.

8. 发明专利

JPH08255726A MANUFACTURE OF MAGNET ARRAY AND LIGHT SOURCE USING THE SAME 失效
公开(公告)号：JPH08255726A
公开(公告)日：1996-10-01
申请号：JP5737195
申请日：1995-03-16
申请人： SHINETSU CHEMICAL CO
发明人： OKUDA SHUICHI , OHASHI TAKESHI
IPC分类号： H05H13/04 , H01F41/02
摘要： PURPOSE: To miniaturize a light source by periodically radiating a rare earth element magnet plate spatially at a predetermined interval with a radioactive ray to demagnetize while applying a reverse magnetic field to the magnet plate unidirectionally magnetized in a thickness direction, and simultaneously applying the reverse magnetic field to invert the magnetization. CONSTITUTION: A permanent magnet magnetic circuit for applying a reverse magnetic field made of a permanent magnet 2 and a yoke 3 is manufactured, and a magnetized rare earth element permanent magnet plate 1 is inserted into an air gap 6. An electron beam 4 is radiated from an upper direction, and radiated to the plate 1 from a gap 5. Thus, a reverse magnetic field is generated in the plate 1 unidirectionally magnetized in the thickness direction, and the magnetization of the radiated site is inverted. Thus, the short period length of the magnet array in which the magnets periodically inverted in the magnetizing direction of the magnets can be realized without forming a thin plate magnet.

9. 发明专利

JPH0847487A MAGNETIC FIELD GENERATOR 失效
公开(公告)号：JPH0847487A
公开(公告)日：1996-02-20
申请号：JP2722493
申请日：1993-01-22
申请人： SHINETSU CHEMICAL CO
发明人： KOBAYASHI NOBUTAKA , OHASHI TAKESHI
IPC分类号： G01R33/387 , A61B5/055
摘要： PURPOSE:To generate a highly uniform magnetic field in an MRI rectangular in a plane view by providing a magnetic flux shunting member comprising a magnetic material on the whole or a part of at least one side of a pair of permanent magnets CONSTITUTION:A line of magnetic force 24' emitted from around a side with flux shunting materials 22b and 22d of a magnet 14b enters the flux shunting materials 22b and 22d and is returned to the magnet 14b to form a loop. In other words, the flux shunting materials 22a and 22d are combined to allow the line of magnetic force to make a loop in stead of being attracted to a columnar yoke as in the past. As a result, the line of magnetic force of a magnetic field leaking near the side of the magnet appears evenly almost in a radial manner as viewed from above the magnet. This enables the lessening of a difference between the horizontal and vertical directions of the flow of the line of magnetic force emitted at the center of the magnet thereby enabling the obtaining of a highly uniform magnetic field within a spherical area.

10. 发明专利

JPH07157875A MAGNETIC CIRCUIT FOR MAGNETRON SPUTTERING 失效
公开(公告)号：JPH07157875A
公开(公告)日：1995-06-20
申请号：JP34051393
申请日：1993-12-08
申请人： SHINETSU CHEMICAL CO
发明人： OHASHI TAKESHI
IPC分类号： H05H1/46 , C23C14/35 , G11B5/85 , G11B5/851 , G11B11/10 , G11B11/105 , H01F7/02
摘要： PURPOSE:To provide the magnetic circuit for magnetron sputtering capable of forming a sputtered film uniform in thickness and composition. CONSTITUTION:Three or more sectorial or triangular rare-earth permanent magnets are combined to form a disk or a polygon, and the magnetization of the magnet is directed toward the center of the disk or polygon or in parallel to the centerline of the sector or triangle to produce a permanent magnet for magnetron sputtering using the permanent magnet, the radius r1 (or the length from the center to one vertex) of the discoid or polygonal magnet is made smaller than the radius r2 of a target 62 provided on the magnet, or 0.5

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