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公开(公告)号：DE68927185D1
公开(公告)日：1996-10-17
申请号：DE68927185
申请日：1989-05-31
Applicant: NGK INSULATORS LTD
Inventor： MATSUHISA TADAAKI , KATO SHIGEKI , IWASAKI HIROYUKI
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公开(公告)号：DE3942421A1
公开(公告)日：1990-07-19
申请号：DE3942421
申请日：1989-12-21
Applicant: NGK INSULATORS LTD
Inventor： KATO SHIGEKI , INOUE KATSUHIRO
Abstract: A ceramic jointed body composed of two molded bodies which are individually molded by different methods, respectively, and integrally jointed by isostatic pressing, wherein a difference between "amounts of spring back" of the two molded bodies satisfies the formula thereby preventing cracks from occurring in the jointed body.
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公开(公告)号：DE69710001T2
公开(公告)日：2002-09-19
申请号：DE69710001
申请日：1997-08-05
Applicant: NGK INSULATORS LTD
Inventor： KATO SHIGEKI
IPC: C04B37/00
Abstract: A joint body formed of a ceramic member composed of a main body (4) and a disclike projection (5), and a ceramic cylindrical body. The disclike projection is inserted inside the cylindrical body, and a relative density of the disclike projection is higher than that of the cylindrical body. The cylindrical body is composed of a straight portion (2d) not contacted by the projection and having a uniform inside diameter, a diameter-expanded portion (2a) in contact with the projection and having the largest inner diameter, and a tapered connecting portion bridging the straight portion and diameter-expanded portion. A difference between the inner diameter of the straight portion and that of the diameter-expanded portion is 0.05 mm to 0.6 mm.
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公开(公告)号：BR0106941A
公开(公告)日：2002-05-14
申请号：BR0106941
申请日：2001-07-04
Applicant: NGK INSULATORS LTD
Inventor： KATO SHIGEKI , HIRAI SADAAKI , KAWAE TAKAYUKI
IPC: B01D53/86 , B01D53/88 , B01J35/04 , B01J37/00 , B22F1/00 , B22F3/02 , B22F3/11 , B22F3/20 , B22F3/22 , B22F5/10 , B28B3/20 , B28B3/26 , C04B35/195 , C04B35/632 , C04B35/634 , C04B38/00 , F01N3/28 , C04B35/00
Abstract: A honeycomb formed body is obtained by subjecting a mixture of a raw material powder and a forming binder to extrusion, wherein the forming binder is a mixture of a wax and a thermoplastic resin and the mixing ratio of the thermoplastic resin in the forming binder is 5 to 50% by weight. A honeycomb formed body having a partition wall as thin as 25 to 100 mum can be mass-produced efficiently without generating cracks or deforming the die of extruder.
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公开(公告)号：DE69703944D1
公开(公告)日：2001-03-01
申请号：DE69703944
申请日：1997-03-26
Applicant: NGK INSULATORS LTD
Inventor： KATO SHIGEKI
IPC: C04B35/10 , C01F7/46 , C04B35/111 , H01L21/02
Abstract: An alumina sintered body containing, as impurities, sodium oxide, potassium oxide, silicon oxide, calcium oxide, ferric oxide and titanium oxide in a total amount in the range from 100 to 10000 ppm, in which a total amount of the sodium oxide and potassium oxide based on the total amount of the impurities is not more than 4 wt.%. In the manufacture of the sintered body, its starting powder is admixed with at least an acid compound to produce metal salts by a reaction of the acid compound with metals contained in the starting powder and the resulting metal salts are removed.
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Patent Agency Ranking
公开(公告)号：DE69512173T2
公开(公告)日：2000-02-10
申请号：DE69512173
申请日：1995-10-18
Applicant: NGK INSULATORS LTD
Inventor： WATANABE KEIICHIRO , KATO SHIGEKI , EGAWA KOJI
IPC: B28B11/04 , C04B35/622 , C04B35/63 , C04B35/632 , C04B35/638 , C04B41/45 , B22F3/12
Abstract: A ceramic material is a calcined article obtained by calcining a molded ceramic article and in which the pores of the calcined article are impregnated with a substance which can be removed at a temperature lower than a sintering temperature for the molded ceramic article. A method for manufacturing a ceramic product includes the steps of calcining a molded ceramic article, impregnating the open pores of the calcined ceramic article with a substance which can be removed at a temperature lower than a sintering temperature for the calcined ceramic article, mechanically machining the ceramic article to impart a desired shape thereto, removing the substance from the ceramic article, and then sintering the ceramic article. Large-sized ceramic products having a high strength and an excellent shape accuracy and having complex shapes can be manufactured at low costs. The change of the product shape can be accomplished only by changing a program for operation, and for the ceramic products having various shapes, a prompt design changing is possible.
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公开(公告)号：DE19612184C2
公开(公告)日：1999-09-09
申请号：DE19612184
申请日：1996-03-27
Applicant: NGK INSULATORS LTD
Inventor： KATO SHIGEKI , OHTSUBO SHINJI
IPC: C04B35/00 , B28B1/24 , C04B35/638 , B28B13/00
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公开(公告)号：DE3942421C2
公开(公告)日：1997-07-17
申请号：DE3942421
申请日：1989-12-21
Applicant: NGK INSULATORS LTD
Inventor： KATO SHIGEKI , INOUE KATSUHIRO
Abstract: A ceramic jointed body composed of two molded bodies which are individually molded by different methods, respectively, and integrally jointed by isostatic pressing, wherein a difference between "amounts of spring back" of the two molded bodies satisfies the formula thereby preventing cracks from occurring in the jointed body.
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公开(公告)号：DE68902279D1
公开(公告)日：1992-09-03
申请号：DE68902279
申请日：1989-05-31
Applicant: NGK INSULATORS LTD
Inventor： MATSUHISA TADAAKI , KATO SHIGEKI , IWASAKI HIROYUKI B- PAVILION H
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公开(公告)号：DE3942744A1
公开(公告)日：1990-06-28
申请号：DE3942744
申请日：1989-12-22
Applicant: NGK INSULATORS LTD
Inventor： KATO SHIGEKI , INOUE KATSUHIRO
Abstract: A ceramic injection molded body which is heated to remove organic binder and then hydrostatically pressed after injection molding. The molded body has a volume of fine pores having a diameter of at least 0.1 mu m being at least 30% of the total volume of fine pores in the molded body after removed of organic binders, and the volume of fine pores having a diameter of at most 0.1 mu m being at least 50% of the total volume of fine pores in the molded body after hydrostatic pressing.
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