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41. 发明专利

JPH1067585A OXIDATION RESISTANT TREATMENT OF CARBONACEOUS MATERIAL 失效
公开(公告)号：JPH1067585A
公开(公告)日：1998-03-10
申请号：JP22654296
申请日：1996-08-28
申请人： MITSUBISHI HEAVY IND LTD
发明人： MORIMOTO TATSUO , HIRATA TAKEHIKO , KONDO MASAYUKI
IPC分类号： C04B41/87 , C04B41/50
摘要： PROBLEM TO BE SOLVED: To provide a method for forming an SiC coating layer in an oxidation resistant treatment of a carbonaceous raw material, suitable for treating a large-sized mass production product, excellent in adhesion property of an Si source with the raw material under a heat treatment, and not generating a blister and a distortion at the surface of the raw material. SOLUTION: This method of an oxidation resistant treatment of a carbonaceous raw material is to react carbon on the surface of the carbonaceous raw material with silicon for converting the composition of the surface of the carbonaceous raw material to silicon carbide (SiC). In this case, as a source 11 (Si source) for supplying Si necessary for the reaction, a powder of a material containing silicon added with a powder of a ceramic material and further added with a thermosetting resin 12, is used. Also, characteristics of the process are: using a method of applying the powder instead of using a crucible treatment and using a raw material powder consisting of an oxide as a powder of the ceramic material and a powder of silicon nitride (Si3 N4 ) as the Si source.

42. 发明专利

JPH09147876A FUEL ELECTRODE MATERIAL OF SOLID ELECTROLYTE TYPE ELECTROCHEMICAL CELL 失效
公开(公告)号：JPH09147876A
公开(公告)日：1997-06-06
申请号：JP30877395
申请日：1995-11-28
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMAMOTO HIROICHI , HIRATA TAKEHIKO , MIYAJI MASAKAZU , TSURU YASUHIKO
IPC分类号： H01M4/86 , H01M8/02
摘要： PROBLEM TO BE SOLVED: To improve conformity with a thermally expansive property of completely stabilizing zirconia electrolyte and electric conductivity by providing the cermet composition by mixing Ni metal and a speciflic metallic oxide. SOLUTION: Ni metal and one or more kinds of metallic oxides selected from Ta2 O5 , Nb2 O3 , ZrSiO4 , HfTiO4 , Ta2 TiO7 , Ta2 WO8 and Nb2 TiO7 are mixed together in a wet system, and after it is dried, it is classified, and is baked, and a fuel electrode material of a solid electrolyte type electrochemical cell having the cermet composition is obtained.

43. 发明专利

JPH08277163A SILICON NITRIDE-BASED SINTERED COMPACT AND ITS PRODUCTION 失效
公开(公告)号：JPH08277163A
公开(公告)日：1996-10-22
申请号：JP8012895
申请日：1995-04-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： MURAKAMI YUICHIRO , AKIYAMA KATSUNORI , HIRATA TAKEHIKO , YAMAMOTO HIROICHI
IPC分类号： C04B35/584
摘要： PURPOSE: To obtain a silicon nitride-based sintered compact useful as a mechanical part requiring a high strength, oxidation resistance, etc., at a high temperature. CONSTITUTION: This silicon nitride-based sintered compact is obtained by packing a Yb-Si-Al-O-C-N-based or Yb-Si-O-C-N-based oxycarbonitride glass or the oxycarbonitride glass and crystallite formed by crystallizing it into gaps between silicon nitride particles. The silicon nitride-based sintered compact is produced by molding mixed powder comprising 70-97wt.% of silicon nitride, 2-25wt.% of ytterbium oxide, 0-5wt.% of aluminum oxide and 0.5-5wt.% of silicon carbide and baking the molding in a nitrogen gas pressurized atmosphere at 1,700-2,100 deg.C to pack the oxycarbon nitride glass into gaps between the silicon nitride particles.

44. 发明专利

JPH07133159A PRODUCTION OF SILICON NITRIDE SINTERED COMPACT 失效
公开(公告)号：JPH07133159A
公开(公告)日：1995-05-23
申请号：JP27412193
申请日：1993-11-02
申请人： MITSUBISHI HEAVY IND LTD
发明人： HIRATA TAKEHIKO , MIYAJI MASAKAZU
IPC分类号： C04B35/584 , C04B35/626
摘要： PURPOSE:To obtain a silicon nitride sintered compact having a high fracture toughness value. CONSTITUTION:Powdery starting material for silicon nitride is wet-mixed with a liq. phase carbon source, dried and heated in a nitrogen atmosphere to obtain a mixture of silicon nitride powder with silicon carbide powder. This mixture is further mixed with a sintering aid and subjected to uniaxial press sintering to produce the objective silicon nitride sintered compact.

45. 发明专利

JPH04367564A SILICON NITRIDE-BASED PRESSED COMPACT AND ITS PRODUCTION 失效
公开(公告)号：JPH04367564A
公开(公告)日：1992-12-18
申请号：JP14150891
申请日：1991-06-13
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMAMOTO HIROICHI , MORI KAZUTAKA , HIRATA TAKEHIKO
IPC分类号： C04B35/584 , C04B35/58
摘要： PURPOSE:To provide a silicon nitride-based sintered compact requiring abrasion resistance at high temperatures and a method for producing the above-mentioned sintered compact. CONSTITUTION:The subject method is a method for producing a silicon nitride- based sintered compact composed of sintering mixed powder composed of 0.3-5wt.% zirconium oxide powder and/or samarium oxide powder having =200kg/cm pressure. Furthermore, the silicon nitride-based sintered compact obtained by the aforementioned method is provided.

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