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31. 发明专利

JP2001093481A LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JP2001093481A
公开(公告)日：2001-04-06
申请号：JP26665899
申请日：1999-09-21
申请人： HITACHI LTD
发明人： KATO TOMOYA , KANEDA JUNYA , OBANA TAKESHI , ABE TERUYOSHI , AONO YASUHISA
IPC分类号： H01M2/02 , C22C23/02 , C23C22/00 , C23C22/02 , H01M10/05 , H01M10/052 , H01M10/0565 , H01M10/0566 , H01M10/0585 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a lithium secondary battery which is made light and cannot be deteriorated in functions of a battery by erosion and the like. SOLUTION: The invention relates to a lithium secondary battery which uses electrolyte solution containing electrolyte of fluorine compound, also uses a Mg-based alloy for a can of the battery, wherein preferably a passive state coating film mainly of MgF2 is generated on an inner surface of the can.

32. 发明专利

JPH1130195A ELECTRIC BLOWER AND MANUFACTURE OF IMPELLER USED FOR ELECTRIC BLOWER 失效
公开(公告)号：JPH1130195A
公开(公告)日：1999-02-02
申请号：JP18623097
申请日：1997-07-11
申请人： HITACHI LTD
发明人： OBANA TAKESHI , NAKAMURA KIYOMI , INAGAKI MASATOSHI , AONO YASUHISA , OKAMURA HISANOBU , SUGA HISANAKA , JORAKU FUMIO
IPC分类号： F04D29/02 , F04D29/28 , F04D29/30 , F04D29/62
摘要： PROBLEM TO BE SOLVED: To improve the rigidity of the whole impeller and reduce load applied to a rotary shaft of a motor so as to improve the rotating speed of an electric blower by forming an impeller fitted and fixed to the rotary shaft of the motor, of a magnesium alloy. SOLUTION: The upper face of an impeller in an electric blower disposed in a vacuum cleaner is provided with a front plate 101 with a suction port 801, and a rear plate 102 opposedly provided below the front plate 101. Blades 103 are disposed in such a way as to be held between the front plate 101 and rear plate 102, and the front plate 101 and the blades 103 are integrally formed. The front plate 101 and blades 103 are formed of a magnesium alloy, while the rear plate 102 is formed of an Al-Mg group aluminium alloy. The blades 103 and a blazing metal layer formed at the rear plate 102 are jointed by blazing so as to integrate the blades 103 with the rear plate 102.

33. 发明专利

JP2001210282A SECONDARY BATTERY 失效
公开(公告)号：JP2001210282A
公开(公告)日：2001-08-03
申请号：JP2000014785
申请日：2000-01-24
申请人： HITACHI MAXELL , HITACHI LTD
发明人： OKAMURA HISANOBU , OBANA TAKESHI , HORIIE HIROSHI , FUJIWARA YOSHIHISA
IPC分类号： H01M2/02 , C22C21/02 , C22C21/06 , C22C23/02
摘要： PROBLEM TO BE SOLVED: To provide a battery having a battery case having sufficient strength and a reduced weight, smoothly processed with deep drawing. SOLUTION: Magnesium is used as a main composition to which alloying elements including aluminum, zinc and manganese are added to form a magnesium alloy. The magnesium alloy is rolled into a plate material which is subjected to deep drawing to form the battery case.

34. 发明专利

JPH11264078A MAGNESIUM ALLOY MEMBER, ITS USAGE, ITS TREATMENT SOLUTION AND ITS PRODUCTION 失效
公开(公告)号：JPH11264078A
公开(公告)日：1999-09-28
申请号：JP6811498
申请日：1998-03-18
申请人： HITACHI LTD
发明人： KATO TOMOYA , OBANA TAKESHI , SHOJI SABURO , FUJII KAZUMI , OHASHI TAKEYA
IPC分类号： C25D11/30 , A47L5/22 , C23C22/00 , C23C22/40 , C23C22/42 , C23C22/44 , C23C22/57 , C23C30/00 , C23F11/00 , F01P5/02 , F04D29/02
摘要： PROBLEM TO BE SOLVED: To obtain a chemically treated film having good corrosion resistance with a water solution not having environmental noxiousness by forming an oxide film containing Mg and Mo of a prescribed ratio with an atomic ratio on a Mg alloy surface. SOLUTION: An oxide film contains, by atomic ratio, 15-35% Mg and 5-20% Mo. The oxide film on a Mg alloy surface preferably contains, by atomic ratio, 15-352 Mg, 5-20% Mo, =-1500 mV, further a water repellent film containing fluorine is preferably provide on the oxide film in addition to the oxide film on the Mg alloy surface. By this method, a painting substrate excellent in corrosion resistance is produced, by applying corrosion resistant painting on this film, a farther excellent corrosion resistant coating film is obtained.

35. 发明专利

JPH1150235A OXIDATION RESISTING SURFACE COATING ONTO NB ALLOY 失效
公开(公告)号：JPH1150235A
公开(公告)日：1999-02-23
申请号：JP20784697
申请日：1997-08-01
申请人： HITACHI LTD
发明人： FUJIWARA TETSUO , OBANA TAKESHI , INAGAKI MASATOSHI
IPC分类号： C23C14/14 , C23C14/06 , C23C14/16
摘要： PROBLEM TO BE SOLVED: To obtain an Nb alloy heat resistant member showing excellent oxidation resistance in a high temp. region by forming surface coating onto an alloy essentially consisting of Nb into the one in which the surface of a primary layer composed of Ir having a specified value or above of purity is provided with a secondary layer composed of Au. SOLUTION: An alloy essentially consisting of Nb, e.g. a base material 101 (Nb3 Al base intermetallic compd.) is set to a high frequency sputtering coating forming device charged with an Ir target having >=99.9% purity. The inside of a chamber is evacuated, thereafter, gaseous Ar is introduced into the chamber, the pressure therein is regulated to generate plasma, and coating of Ir is executed to form a primary layer 107 composed of Ir having >=95% purity on the base material 101. After that, the base material 101 is moved to a vacuum deposition device, and Au having >=99.9% purity is melted under heating and evaporated to form a secondary layer 105 as Au coating on the primary layer 107. In this way, the Nb heat resistant member showing excellent oxidation resistance even at >=1100 deg.C can be obtd.

36. 发明专利

JPH1139631A MAGNETIC DISK 失效
公开(公告)号：JPH1139631A
公开(公告)日：1999-02-12
申请号：JP19360897
申请日：1997-07-18
申请人： HITACHI LTD
发明人： SHINOHARA HIDEKI , RI AKIRA , OBANA TAKESHI , INAGAKI MASATOSHI
IPC分类号： C22C23/00 , C22C45/00 , G11B5/62 , G11B5/73 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To provide a magnetic disk substrate for a hard disk capable of easily attaining a higher speed of rotation and lessened electric power consumption by constituting the magnetic disk substrate of a magnesium based alloy contg. inevitable impurities and magnesium in excess of a specific weight per cent. SOLUTION: The torque and energy necessary for rotating an object are proportional to the moment of inertia of the object and the moment of inertia is proportional to the sp. gr. of the material in the case of a disk shape of the same size. The magnesium based alloy contg. >=50 wt.% magnesium is used for the hard disk. On the other hand, the countermeasure by the strength reinforcing plate in the central part for the damage of the hard disk by a centrifugal stress may be made less than in the case an aluminum based alloy is used. As a result, the driving with a lower-output motor is made possible and the size of the hard disk device may be reduced and the electric power consumption thereof is reduced. Further, the reduction of the centrifugal stresses is possible and, therefore, the higher-speed rotation is made possible.

37. 发明专利

JPH1131336A WRITABLE REFLECTION TYPE OPTICAL DISK 失效
公开(公告)号：JPH1131336A
公开(公告)日：1999-02-02
申请号：JP18348297
申请日：1997-07-09
申请人： HITACHI LTD
发明人： SHINOHARA HIDEKI , RI AKIRA , OBANA TAKESHI , INAGAKI MASATOSHI
IPC分类号： C22C21/06 , C22C23/02 , C22C45/00 , C22C45/08 , C25D11/04 , G11B7/24 , G11B7/253 , G11B19/28
摘要： PROBLEM TO BE SOLVED: To improve a recycling characteristic and to decrease the centrifugal stresses applied on a disk by constituting an optical disk substrate of either of an aluminum based alloy or magnesium based alloy. SOLUTION: This optical disk comprises a plate material including at least either of a substrate composed of the magnesium based alloy contg. inevitable impurities and magnesium exceeding 11 wt.% or a substrate composed of the aluminum based alloy contg. inevitable impurities and at least 10 wt.% aluminum. The substrate is rotated at >=10,000 revolutions/min. The centrifugal stresses are smaller and the less reinforcement of the central part is necessitated even under such high-speed rotation as compared with the case the substrate is composed of ABS plastic. Since the substrate has higher rigidity, the deflection of the signal recording surface by eccentricity is lessened. Further, if metals are melted when recycled, the signal surface protective films burn out and the recycling characteristic is improved as well.

38. 发明专利

JPH1131335A READ-ONLY REFLECTION TYPE OPTICAL DISK 失效
公开(公告)号：JPH1131335A
公开(公告)日：1999-02-02
申请号：JP18348197
申请日：1997-07-09
申请人： HITACHI LTD
发明人： SHINOHARA HIDEKI , RI AKIRA , OBANA TAKESHI , INAGAKI MASATOSHI
IPC分类号： C22C21/06 , C22C23/02 , C22C45/00 , C22C45/08 , C25D11/04 , G11B7/24 , G11B7/253 , G11B19/28
摘要： PROBLEM TO BE SOLVED: To improve a recycling characteristic and to decrease the centrifugal stresses applied on a disk by constituting an optical disk substrate of either of an aluminum based alloy or magnesium based alloy. SOLUTION: This optical disk comprises a plate material including at least either of a substrate composed of the magnesium based alloy contg. inevitable impurities and magnesium exceeding 11 wt.% or a substrate composed of the aluminum based alloy contg. inevitable impurities and at least 10 wt.% aluminum. The substrate is rotated at >=10,000 revolutions/min. The centrifugal stresses are smaller and the less reinforcement of the central part is necessitated even under such high-speed rotation as compared with the case substrate is composed of ABS plastic. Since the substrate has higher rigidity, the deflection of the signal recording surface by eccentricity is lessened. Further, if metals are melted when recycled, the signal surface protective films burn out and the recycling characteristic is improved as well.

39. 发明专利

JPH08121104A TURBINE BLADE AND GAS TURBINE EQUIPPED WITH HIGH CORROSION RESISTANT COATED LAYER 失效
公开(公告)号：JPH08121104A
公开(公告)日：1996-05-14
申请号：JP25496394
申请日：1994-10-20
申请人： HITACHI LTD
发明人： FUJIWARA TETSUO , OBANA TAKESHI , KOJIMA YOSHIYUKI , FUKUI HIROSHI
IPC分类号： F01D5/28 , F02C7/00
摘要： PURPOSE: To attain a turbine blade equipped with a coated layer indicating excellent corrosion resistance by providing a metal layer containing Ir having a purity of more than the specified value by weight ratio on at least a part of the surface of a base material composed of a heat resistant alloy containing Ni as its principal ingredients. CONSTITUTION: A single crystal blade is attained by an one way solidification casting method using Ni group super alloy single crystal alloy as its base material 101. A metal layer 102 of 0.5 to 300μm thickness is provided on the coated part of a blade part and a platform part, which are subject to exposure to the fuel gas of the blade, by a plasma flame spraying method in pressure reducing atmosphere using Ir simplex powder of 30% or more purity by weight ratio. As a pretreatment, degreasing washing and also blasting by AL2 O3 made grid are performed, after which a ZrO2 primatic ceramic TBC (thermal shield coating) layer 104 is provided on the surface of the blade provided with the metal layer 102 using a coating device. Thus an excellent corrosion resistance can be developed even under the metal temperature of 900 deg.C or more.

40. 发明专利

JPH0762481A HIGH STRENGTH WEAR RESISTANT CERAMIC AND ITS PRODUCTION 失效
公开(公告)号：JPH0762481A
公开(公告)日：1995-03-07
申请号：JP20622493
申请日：1993-08-20
申请人： HITACHI LTD
发明人： YASUTOMI YOSHIYUKI , KIKUCHI SHIGERU , FUJIWARA TETSUO , OBANA TAKESHI
IPC分类号： C22C1/05 , B22F5/00 , C22C29/00
摘要： PURPOSE:To produce high strength wear resistant ceramics with grain boundaries of ceramic bonded with an Nb-Al alloy. CONSTITUTION:This high strength wear resistant ceramic is made of a sintered compact obtd. by bonding grains of ceramic contg. at least one of carbides, nitrides, borides or oxides with an Nb-Al alloy not contg. Cu, Co, Ni or Fe. This ceramic can be produced by pressureless sintering, can be formed into a complex shape and is applicable to a cutting tool, parts for a continuous hot dip metal plating apparatus, engine parts, blade parts for a gas turbine, burner parts, shroud parts, the 1st wall parts of the nuclear fusion reactor of a nuclear power plant, etc.

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