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1. 发明专利

JPH09227240A PRODUCTION OF SILICON NITRIDE CERAMIC SINTERED COMPACT 失效
公开(公告)号：JPH09227240A
公开(公告)日：1997-09-02
申请号：JP3065596
申请日：1996-02-19
申请人： NIPPON STEEL CORP
发明人： WATANABE KOJI , IMAFUKU MUNEYUKI , ASADA SHUJI , SATO YUTAKA , SHINPO AKIHIRO
IPC分类号： C04B35/64 , C04B35/584
摘要： PROBLEM TO BE SOLVED: To provide a method for producing an Si3 N4 ceramic sintered compact by which the thickness of a colored surface layer part is reduced, the difference in breaking strength between surface and inner layers is eliminated and a margin to grind the surface is reduced by carrying out firing in a specified atmosphere. SOLUTION: When an Si3 N4 ceramic sintered compact is produced, firing is carried out in an Ar atmosphere. About >=90% purity suffices for the Ar. It is preferable that the amt. of O2 as an impurity is as small as possible but N2 may be contained. For example, an org. binder and water are added to 95 parts commercially available Si3 N4 , 3.5 parts Y2 O3 and 3.5 parts Al2 O3 , they are well mixed in a ball mill, granulated with a spray drier and compacted in a shape of 100×50×30mm by CIP under 1.4 ton. The resultant compact is dewaxed as 500 deg.C in the air and put in a carbon casing laid with BN powder and it is fired at 1,750 deg.C in the Ar atmosphere.

2. 发明专利

JPH08306235A CONDUCTIVE RESIN FOR EMBEDDING ANALYSIS SAMPLE 失效
公开(公告)号：JPH08306235A
公开(公告)日：1996-11-22
申请号：JP10946995
申请日：1995-05-08
申请人： NIPPON STEEL CORP
发明人： IMAFUKU MUNEYUKI , SASAKI REIJI
IPC分类号： G01N23/20 , H01B5/16
摘要： PURPOSE: To give conductivity, make direct measurement of the surface possible, and prevent the contamination of impurities to a material or the generation of scratches on the surface during polishing by containing a specified length range of carbon short fibers in a specified wt.% range in analysis sample embedding resin. CONSTITUTION: Carbon short fibers having a length of 1-8mm is contained 5-20wt% based on the weight of resin in embedding resin such as epoxy resin, polyester resin, or phenol resin. The carbon short fibers have incommensurably larger diameter and length than carbon powder. Even if carbon fibers are crushed during polishing, resticking to the surface of an analysis sample and condense into micro-cracks are hardly generated. When the length of the fibers or content of the fibers are insufficient, conductivity capable of avoiding charge up is not obtained, and when the carbon fibers are excess, the fibers are not uniformly dispersed and voids are undesirably generated on the inside.

3. 发明专利

JPH06247715A PRODUCTION OF OXIDE SUPERCONDUCTING THIN FILM 失效
公开(公告)号：JPH06247715A
公开(公告)日：1994-09-06
申请号：JP5325093
申请日：1993-02-19
申请人： NIPPON STEEL CORP
发明人： SHIMADA HARUO , IMAFUKU MUNEYUKI
IPC分类号： C01B13/14 , C01G1/00 , C01G3/00
摘要： PURPOSE:To effectively incorporate oxygen and to produce an oxide superconducting thin film excellent in superconducting characteristics when an oxide superconducting thin film of a YBaCuO type superconductor etc., is produced. CONSTITUTION:When an oxide superconducting thin film is produced on a substrate, a magnetic field applied parallel to the substrate near the surface of the substrate and oxygen plasma are allowed to interact with each other during production.

4. 发明专利

JPH01215934A PRETREATMENT EQUIPMENT OF FIBER FOR METAL-BASE COMPOSITE MATERIAL 失效
公开(公告)号：JPH01215934A
公开(公告)日：1989-08-29
申请号：JP4258788
申请日：1988-02-25
申请人： NIPPON STEEL CORP
发明人： HASHIMOTO KEIZO , IMAFUKU MUNEYUKI , MATSUMIYA TORU
IPC分类号： B22D19/14 , C22C47/08
摘要： PURPOSE:To enable continuous treatment of fiber and to obtain a fiber block uniformly stuck with powder by arranging a fiber feeder, a hot air device, a mixed liquid tank and a fiber winder in series. CONSTITUTION:Fiber is continuously fed with the rolling mechanism of a fiber feeder A and the twist of a fiber bundle is corrected with a biaxial rolling mechanism 1 capable of rotating in the face vertical to the feeding direction and fiber is sent to a hot air device B where the fiber is separated one by one with straightened hot air and dried, the dried fiber is then passed through a soln. mixed with powder and a binder in a mixed soln. tank C where the surface of the fiber is uniformly stuck with powder by vibration of an ultrasonic vibrator 14. A fiber block uniformly stuck with powder is made by laminating and winding the fiber continuously and uniformly with reciprocating the winding part 16 of a fiber winder D in the direction of a winding shaft. When a long fiber metallic composite material is produced by a high-pressure casting method utilizing the fiber block made in the above-mentioned series of pretreatment equipment, the sound composite material uniformly dispersed with the fiber can be obtained.

5. 发明专利

JPH05238891A 失效
公开(公告)号：JPH05238891A
公开(公告)日：1993-09-17
申请号：JP7590392
申请日：1992-02-28
申请人： NIPPON STEEL CORP
发明人： TEJIMA HIDEKAZU , SHIMADA HARUO , IMAFUKU MUNEYUKI
IPC分类号： C30B29/22 , H01B12/06 , H01B13/00 , H01L39/24
摘要： PURPOSE:To improve superconductive characteristics by replacing the interior of a physical vacuum deposition device with an atmosphere of an inert Gas or N2 under a prescribed pressure when a substrate is at a specific temperature or above and further cooling the substrate in a process for cooling a thin film from a film-forming temperature to ambient temperature. CONSTITUTION:Sputtering is carried out in a physical vacuum deposition device with Ar/O2 gas, etc., using a sintered compact of Y1Ba2Cu3O7-x. (hereinafter referred to as YBCO) as a target. Thereby, a thin film of the YBCO is formed on a substrate such as Mg0 crystal oriented in (100) face at a prescribed temperature. The electrical conduction to a heater for heating the substrate on which the film is formed is then shut off to cool the substrate. When the substrate temperature is >=500 deg.C, the interior of the physical vacuum deposition device is replaced with an atmosphere of an inert gas or N2 under 1mTorr to 1000Torr and cooled to ambient temperature. As a result, the objective oxide-based superconducting thin film, having the high critical temperature and capable of exhibiting good superconductivity is obtained.

6. 发明专利

JPH0578826A DEVICE FOR PRODUCING THIN FILM 失效
公开(公告)号：JPH0578826A
公开(公告)日：1993-03-30
申请号：JP13946391
申请日：1991-05-16
申请人： NIPPON STEEL CORP
发明人： IMAFUKU MUNEYUKI , SHIMADA HARUO , ITO WATARU
IPC分类号： C23C14/24 , C23C14/50 , C23C16/46
摘要： PURPOSE:To enhance heating efficiency or cooling efficiency and to simultaneously stabilize the temperature of a base plate in an early period in film formation in the case of forming a thin film on a heated base plate or a cooled base plate by a physical vapor deposition method or a chemical vapor deposition method. CONSTITUTION:In a device for producing a thin film, a heat shielding body 1 is arranged in the space between a base plate holder 4 for fixing heated base plate 2 or a cooled base plate and a vaporization source and also in the vicinity of the base plate holder. In the case of forming the thin film by heating the base plate at >=300 deg.C, the electric power of a heater is drastically reduced. Moreover, both fluctuation of the temperature of the base plate just after starting vapor deposition and the fluctuation time thereof are drastically suppressed and the conditions of film formation are stabilized. Further even when the base plate is cooled, the cooling efficiency is drastically enhanced and also both fluctuation of the temperature of the base plate just after starting vapor deposition and the fluctuation time thereof are drastically suppressed and the conditions of film formation are stabilized.

7. 发明专利

JPH04367596A PRODUCTION OF Y-BA-CU-O SUPERCONDUCTOR THIN FILM BY REACTION VACUUM DEPOSITION METHOD 失效
公开(公告)号：JPH04367596A
公开(公告)日：1992-12-18
申请号：JP16897991
申请日：1991-06-14
申请人： NIPPON STEEL CORP
发明人： ITO WATARU , TOMOKIYO SUMIMASA , KURAKADO MASAHIKO , SHIMADA HARUO , IMAFUKU MUNEYUKI
IPC分类号： C01G1/00 , C01G3/00 , C30B29/22 , H01B12/06 , H01B13/00 , H01L39/24
摘要： PURPOSE:To establish a new production technique leading to the application of device technique by lowering the conventional substrate temperature of approximately 700 deg.C required for the production of Y-Ba-Co-O superconductor thin films. CONSTITUTION:A method comprises irradiating the surface of a substrate 2 with positive oxygen ions or positive argon ions from an ion gun 6 and simultaneously applying a bias to the substrate from a direct electric source 5 under a clarified condition for realizing the lowering of an operation temperature. The method succeeded in lowering 100-250 deg.C compared with the conventional methods or producing films having the same superconductive critical temperatures.

8. 发明专利

JPH02255504A PRODUCTION OF OXIDE SUPERCONDUCTING THIN FILM 失效
公开(公告)号：JPH02255504A
公开(公告)日：1990-10-16
申请号：JP7671389
申请日：1989-03-30
申请人： NIPPON STEEL CORP
发明人： IMAFUKU MUNEYUKI , TAKAGI YASUO , ITO WATARU
IPC分类号： C04B41/87 , C01B13/14 , C01G1/00 , C23C14/08 , C23C14/34 , H01B12/06 , H01B13/00 , H01L39/24
摘要： PURPOSE:To obtain a thin film having satisfactory superconducting characteristics, such as a high superconductivity transition temp. and a high critical current density, at a low temp. by irradiating a substrate with UV having a prescribed wavelength during film formation by opposing targets sputtering system. CONSTITUTION:Plasma 4 is generated between two opposingly placed targets 1, 2 and an oxide superconducting thin film is formed on a substrate 3. During this film formation, the substrate 3 is irradiated with UV having 200-300nm wavelength from a low pressure mercury lamp or a hydrogen discharge tube as a UV radiator 7. A thin film having satisfactory superconducting characteristics, such as a high superconductivity transition temp. and a high critical current density, is obtd. at such a low temp. as

9. 发明专利

JPH02255501A PRODUCTION OF OXIDE SUPERCONDUCTING THIN FILM 失效
公开(公告)号：JPH02255501A
公开(公告)日：1990-10-16
申请号：JP7671489
申请日：1989-03-30
申请人： NIPPON STEEL CORP
发明人： TAKAGI YASUO , IMAFUKU MUNEYUKI
IPC分类号： C04B41/87 , C01B13/14 , C01G1/00 , C01G3/00 , C23C14/08 , C23C14/34 , C30B29/22 , H01B12/06 , H01B13/00 , H01L39/24
摘要： PURPOSE:To greatly increase the rate of film formation by using alloy targets in place of oxide targets in vapor deposition by opposing targets sputtering system. CONSTITUTION:Glow discharge is caused between a pair of targets 1a, 1b for sputtering placed opposingly to each other, plasma for sputtering is confined between the targets 1a, 1b and vapor deposition is carried out by sputtering. At this time, the targets 1a, 1b are made of an alloy of the constituent elements of an oxide superconducting thin film to be produced with the exception of oxygen. The oxide superconducting thin film is produced on a substrate 4.

10. 发明专利

JP2001106734A METHOD FOR MEASURING METAL ION CONCENTRATION AND METAL ION CONCENTRATION METER 失效
公开(公告)号：JP2001106734A
公开(公告)日：2001-04-17
申请号：JP28724599
申请日：1999-10-07
申请人： NIPPON STEEL CORP
发明人： SUZUKI JUNJI , FUJIOKA YUJI , SAITO KOUJI , IMAFUKU MUNEYUKI
IPC分类号： G01N33/00 , C08F220/06 , C08F220/56 , G01N30/00
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus for continuously measuring kind and concentration of a metal ion by a metal ion concentration-responsive hydrogel reversibly causing volume change in response to the change in metal ion concentration in control of water supply and drainage containing a metal ion. SOLUTION: A gel synthesized by using an N-alkyl(meth)acrylamide, (meth) acrylic acid or a (meth)acrylic acid salt as a main component causes reversibly remarkable swelling/shrinkage by the kind and amount of the metal ion as well as temperature and pH. The metal ion concentration can continuously be measured by observing the change in volume of the metal ion concentration- responsive hydrogel. A specific metal ion can selectively be detected by changing the kind and composition of the N-alkyl(meth)acrylamide, (meth)acrylic acid or (meth)acrylic acid salt and two or more kinds of metal ions can simultaneously and continuously be measured by using a plurality of gels.

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