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1. 发明专利

JP2001319806A PERMANENT MAGNET HAVING NANOCOMPOSITE STRUCTURE 失效
公开(公告)号：JP2001319806A
公开(公告)日：2001-11-16
申请号：JP2000133201
申请日：2000-05-02
申请人： SANEI KASEI KK , NIIHARA KOICHI
发明人： SEKINE SHIGENOBU , NIIHARA KOICHI
IPC分类号： C22C38/00 , H01F1/057 , H01F1/08
摘要： PROBLEM TO BE SOLVED: To provide a permanent magnet which sufficiently exhibits the latent characteristic of a ferromagnetic material and has an excellent magnetic characteristic. SOLUTION: This permanent magnet has such a nanocomposite structure that nonmagnetic phases exist in a thin film-like or a granular state on the grain boundaries of ferromagnetic crystal grains and, at the same time, the nonmagnetic phases exist in the ferromagnetic crystal grains in the state of nanometer-scale grains.

2. 发明专利

JP2000034174A PRODUCTION OF CERAMIC COMPOSITE MATERIAL 失效
公开(公告)号：JP2000034174A
公开(公告)日：2000-02-02
申请号：JP20248598
申请日：1998-07-17
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIIHARA KOICHI
发明人： YOSHIMURA MASASHI , NIIHARA KOICHI
IPC分类号： C04B35/628 , C04B35/78
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a ceramic composite material with high mechanical strength, applicable to products of complicated design such as engine parts. SOLUTION: This method for producing a ceramic composite material comprises incorporating ceramic particles 2 such as of Al2O3 to be served as matrix with 0.5-10 vol.% of non-oxide-based ceramic disperse particles (e.g. of Si3N4, SiC, TiN, TiC, TiB2) 1 =90% but =99% by sintering under pressurized atmosphere to effect dispersion of part of the disperse particles 1 in the matrix particles.

3. 发明专利

JP2985519B2 失效
公开(公告)号：JP2985519B2
公开(公告)日：1999-12-06
申请号：JP18807292
申请日：1992-07-15
申请人： MITSUBISHI MATERIARU KK , NIIHARA KOICHI
发明人： MATSUKI RYUICHI , TAKENOCHI TAKEYOSHI
IPC分类号： C04B35/48

4. 发明专利

JPH11157919A ALUMINA-BASED SINTERED COMPACT HAVING HIGH STRENGTH AND ITS PRODUCTION 失效
公开(公告)号：JPH11157919A
公开(公告)日：1999-06-15
申请号：JP34398497
申请日：1997-11-28
申请人： FINE CERAMICS GIJUTSU KENKYU K , NIIHARA KOICHI , AGENCY IND SCIENCE TECHN
发明人： KOSAKA SHOJI , NIIHARA KOICHI , SANTO MUTSUO
IPC分类号： C04B35/10
摘要： PROBLEM TO BE SOLVED: To obtain an alumina-based sintered compact having high strength in a temperature area from a room temperature to high temperature and provide a method for producing the sintered compact. SOLUTION: Alumina powder having =1,200 deg.C to provide the objective high-strength alumina sintered compact having >=96% relative density, in which 0.001-0.5 vol.% inorganic particles 2 comprising mullite, etc., having

5. 发明专利

JPH10167808A HIGH STRENGTH ALUMINOUS SINTERED COMPACT AND ITS PRODUCTION 失效
公开(公告)号：JPH10167808A
公开(公告)日：1998-06-23
申请号：JP33429996
申请日：1996-12-13
申请人： KYOCERA CORP , NIIHARA KOICHI
发明人： KOSAKA SHOJI , NIIHARA KOICHI
IPC分类号： C04B35/10
摘要： PROBLEM TO BE SOLVED: To produce an aluminous sintered compact having high strength in the temp. range from room temp. to a high temp. SOLUTION: Alumina powder having =1,200 deg.C to obtain the objective high strength aluminous sintered compact contg. 0.001-50vol.% dispersed inorg. crystal grains having

6. 发明专利

JPH10139548A MOLYBDENUM DISILICIDE-BASE COMPOSITE MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JPH10139548A
公开(公告)日：1998-05-26
申请号：JP29264596
申请日：1996-11-05
申请人： NIIHARA KOICHI , KUBOTA KK
发明人： NIIHARA KOICHI , SUZUKI YOSHIKAZU , KUROISHI ATSUSHI
IPC分类号： C04B35/64 , C04B35/58 , C22C32/00
摘要： PROBLEM TO BE SOLVED: To provide a molybdenum disilicide-base composite material (sintered compact) having improved characteristics at room temp. and high temp. and useful as a superheat resistant structural material. SOLUTION: This composite material is a sintered compact with a composite structure having a matrix made of Mo(Si, Al)2 [the pref. atomic ratio of Si:Al is (1-x):x (0.03

7. 发明专利

JPH09309705A PRODUCTION OF PEROVSKITE OXIDE-BASE NANOCOMPOSITE 失效
公开(公告)号：JPH09309705A
公开(公告)日：1997-12-02
申请号：JP12691796
申请日：1996-05-22
申请人： NIPPON STEEL CORP , NIIHARA KOICHI
发明人： KATAYAMA SHINGO , YAMADA NORIKO , YOSHINAGA IKUKO , NAGAI TORU , NIIHARA KOICHI
IPC分类号： C04B35/00 , C01B13/32 , C04B35/495
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a perovskite oxide base nanocomposite capable of uniformly dispersing nanoparticles and densely sinterable at a low temperature. SOLUTION: Nanoparticles are dispersed in an organic solvent containing an alkoxide of a metal constituting a perovskite type oxide dissolved therein and water is then added thereto to carry out the hydrolysis. The solvent is removed to provide a powder, which is subsequently calcined and baked to produce the perovskite oxide-base nanocomposite. In the composite perovskite type oxide A(B', B")O3 , B' is an alkoxide of at least one or more elements selected from Mg, Co, Ni, Zn and Ca and B" is an alkoxide of at least one or more elements selected from Ta, Nb and Sb. A is an alkoxide of at least one or more elements selected from Ba, Sr and Ca. The nanoparticles are sole or mixed particles of alumina, magnesia, spinel, zirconia, yttria, carbon silicide, silicon nitride, sialon, silver, gold and platinum.

8. 发明专利

JPH05319910A CERAMIC COMPOSITE MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JPH05319910A
公开(公告)日：1993-12-03
申请号：JP15117692
申请日：1992-05-20
申请人： MITSUBISHI MATERIALS CORP , NIIHARA KOICHI
发明人： MATSUKI RYUICHI , TAKENOUCHI TAKEYOSHI
IPC分类号： C04B35/10
摘要： PURPOSE:To obtain a high-toughness and high strength composite ceramic material having heat shock resistance without damage to the characteristics of Al2O3/TiC composite material by dispersing fine particles of ZrO2 having a specific particle size in a Al2O3/TiC composite material. CONSTITUTION:A mixture comprising 10 to 30v/v% of ZrO2 of less than 2mum average particle sizes, 1 to 8v/v% of TiC and the rest of Al2O3 of less than 5mum average particle sizes is compacted and sintered in an inert atmosphere over 1400 deg.C to give a composite material where fine particles of ZrO2 of less than 2mum average particle sizes are dispersed in a ceramic where 1 to 8v/v% of TiC fine particles of less than 2mum average particle sizes are dispersed in the crystalline particles of Al2O3 matrix of 0.2 to 10mum average particle sizes. The composite material can be produced by low-temperature sintering and has excellent heat shock resistance in addition to excellent abrasion resistance and heat resistance of Al2O3/TiC composite material which shows high strength not only at room temperature but also at elevated temperature.

9. 发明专利

JPH04149062A CERAMIC COMPOSITE MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JPH04149062A
公开(公告)日：1992-05-22
申请号：JP27232690
申请日：1990-10-12
申请人： MITSUBISHI MATERIALS CORP , NIIHARA KOICHI
发明人： MATSUKI RYUICHI , TAKENOUCHI TAKEYOSHI , SASAKI HIROSHI , NIIHARA KOICHI
IPC分类号： C04B35/10
摘要： PURPOSE:To obtain composite ceramics having high toughness and strength by dispersing fine TiN particles and SiC whiskers in the grains of an Al2O3 matrix. CONSTITUTION:This ceramic composite material has a structure formed by dispersing 3-40vol.% fine TiN particles of =1,500 deg.C.

10. 发明专利

JPH0477354A CERAMIC COMPOSITE MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JPH0477354A
公开(公告)日：1992-03-11
申请号：JP19084290
申请日：1990-07-20
申请人： MITSUBISHI MATERIALS CORP , NIIHARA KOICHI
发明人： UEDA HISAO , TAKENOUCHI TAKEYOSHI , SASAKI HIROSHI , NIIHARA KOICHI
IPC分类号： C04B35/10 , C04B35/101
摘要： PURPOSE:To enhance strength and toughness by dispersing specified amts. of fine TiC particles of a specified particle diameter and Si3N4 whiskers of a specified diameter in the grains of an Al2O3 matrix having grains of a specified grain diameter. CONSTITUTION:This composite material contains 3-40wt.% fine TiC particles of =1,500 deg.C.

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