公开(公告)号：CA1146598A

公开(公告)日：1983-05-17

申请号：CA365781

申请日：1980-11-28

Applicant: UBE INDUSTRIES

Inventor： YAJIMA SEISHI ,  OKAMURA KIYOHITO ,  HASEGAWA YOSHIO ,  YAMAMURA TAKEMI

IPC: C04B35/571 ,  C04B35/589 ,  C04B35/63 ,  C04B35/56

Abstract: A process for producing a sintered ceramic body, which comprises heating a semi-inorganic block copolymer at a temperature of from 500 to 2300.degree.C in an environment of vacuum or inert gases, reducing gases or hydrocarbon gases, said copolymer comprising polycarbosilane blocks, having a main-chain skeleton composed mainly of carbosilane units of the formula ?Si-CH2? and titanoxane units of the formula ?Ti-O?; and shaping the heated product, and simultaneously with, or after, the shaping of the heated product, sintering the shaped product at a temperature of from 800.degree.C to 2300.degree.C in an environment of vacuum or inert gases, reducing gases or hydrocarbon gases; and a sintered ceramic body consisting substantially of Si, Ti and C and optionally of 0, said sintered by being composed substantially of (1) an amorphous material consisting substantially of Si, Ti and C and optionally of 0, or (2) an aggregate consisting substantially of ultrafine crystalline particles of .beta.-SiC, TiC, a solid solution of .beta.-SiC and TiC and TiC1-x wherein o

公开(公告)号：DE2460356A1

公开(公告)日：1975-07-17

申请号：DE2460356

申请日：1974-12-20

Applicant: UBE INDUSTRIES

Inventor： NAKATOMI SHUNSUKE ,  YAMAMURA TAKEMI ,  AKIBA YOSHIKAZU

IPC: B01J23/00 ,  B01J23/66 ,  B01J27/00 ,  B01J31/00 ,  C07B61/00 ,  C07C1/00 ,  C07C6/04 ,  C07C11/10 ,  C07C67/00

Abstract: Isopentene is produced in a high yield by a method wherein disproportionation of a hydrocarbon mixture containing n-butene and isobutene is carried out by bringing, at 200 DEG to 350 DEG C, the hydrocarbon mixture into contact with a composite catalyst which has been prepared by depositing a barium or strontium compound and a silver compound onto a carrier material consisting of an activated high purity alumina carrier to produce a precursory composite catalyst, calcining the precursory composite catalyst at 300 DEG to 900 DEG C, and isolating the resulted isopentene from the reaction mixture.

公开(公告)号：FR2680365B1

公开(公告)日：1995-07-13

申请号：FR9210010

申请日：1992-08-13

Applicant: UBE INDUSTRIES

Inventor： YAMAMURA TAKEMI ,  SHIBUYA MASAKI ,  OHTSUBO HIDEKI ,  HIRATUKA TOORU

IPC: C04B35/565 ,  B82Y30/00 ,  C03C14/00 ,  C04B35/80 ,  D01F9/10 ,  D03D15/00 ,  D03D25/00 ,  D04H1/4209

Abstract: An inorganic fiber sinter consists essentially of (a) an inorganic substance (I) selected from the group consisting of (i) an amorphous substance consisting essentially of Si, M, C and O, (ii) an agglomerate consisting essentially of crystalline ultrafine particles of beta -SiC, MC, a solid solution of beta -SiC with MC and/or MC1-x, and amorphous SiO2 and MO2, and (iii) a mixture of the above amorphous substance (i) and the agglomerate (ii), and (b) an inorganic substance (II) selected from the group consisting of (iv) an amorphous substance consisting essentially of Si, M and O, (v) a crystal agglomerate consisting essentially of crystalline SiO2 and MO2, and (iv) a mixture of the amorphous substance (iv) and the crystal agglomerate (v), wherein M is Ti or Zr and x is a number of more than 0 to less than 1. Due to its high uniformity and high strength, the sinter is used mainly for internal combustion engine parts such as a piston ring and an auxiliary combustion chamber, and rocket engine parts such as a nose cone and a nozzle.

公开(公告)号：DE3889042T2

公开(公告)日：1994-07-21

申请号：DE3889042

申请日：1988-09-01

Applicant: UBE INDUSTRIES

Inventor： YAMAMURA TAKEMI ,  IAHIKAWA TOSHIHIRO ,  SHIBUYA MASAKI

IPC: D01F9/10 ,  C04B35/622 ,  C04B35/80 ,  C04B35/82 ,  C08K7/10 ,  H01Q17/00 ,  H05K9/00

Abstract: This invention provides an electromagnetic wave absorbing material composed of a composite material comprising a fiber having a specific resistance of 10 to 10 OMEGA .cm and a matrix, wherein the fiber is composed of an inorganic substance selected from i) an amorphous substance substantially composed of Si, M, C and O, ii) crystalline ultrafine particles substantially composed of beta -SiC, C, MC, a solid solution of beta -SiC and MC and/or MC1-x, and having a particle diameter of not more than 50 nm, or optionally, an aggregate of the crystalline ultrafine particles, amorphous SiO2 and amorphous MO2, and iii) a mixture of the above i) amorphous substance with the above ii) crystalline ultrafine particles or aggregate, in which M denotes Ti or Zr, and X is more than 0 less than 1. t

公开(公告)号：DE3889042D1

公开(公告)日：1994-05-19

申请号：DE3889042

申请日：1988-09-01

Applicant: UBE INDUSTRIES

Inventor： YAMAMURA TAKEMI ,  IAHIKAWA TOSHIHIRO ,  SHIBUYA MASAKI

IPC: D01F9/10 ,  C04B35/622 ,  C04B35/80 ,  C04B35/82 ,  C08K7/10 ,  H01Q17/00 ,  H05K9/00

Abstract: This invention provides an electromagnetic wave absorbing material composed of a composite material comprising a fiber having a specific resistance of 10 to 10 OMEGA .cm and a matrix, wherein the fiber is composed of an inorganic substance selected from i) an amorphous substance substantially composed of Si, M, C and O, ii) crystalline ultrafine particles substantially composed of beta -SiC, C, MC, a solid solution of beta -SiC and MC and/or MC1-x, and having a particle diameter of not more than 50 nm, or optionally, an aggregate of the crystalline ultrafine particles, amorphous SiO2 and amorphous MO2, and iii) a mixture of the above i) amorphous substance with the above ii) crystalline ultrafine particles or aggregate, in which M denotes Ti or Zr, and X is more than 0 less than 1. t

公开(公告)号：FR2680365A1

公开(公告)日：1993-02-19

申请号：FR9210010

申请日：1992-08-13

Applicant: UBE INDUSTRIES

Inventor： YAMAMURA TAKEMI ,  SHIBUYA MASAKI ,  OHTSUBO HIDEKI ,  HIRATUKA TOORU

IPC: C04B35/565 ,  B82Y30/00 ,  C03C14/00 ,  C04B35/80 ,  D01F9/10 ,  D03D15/00 ,  D03D25/00 ,  D04H1/4209

Abstract: An inorganic fiber sinter consists essentially of (a) an inorganic substance (I) selected from the group consisting of (i) an amorphous substance consisting essentially of Si, M, C and O, (ii) an agglomerate consisting essentially of crystalline ultrafine particles of beta -SiC, MC, a solid solution of beta -SiC with MC and/or MC1-x, and amorphous SiO2 and MO2, and (iii) a mixture of the above amorphous substance (i) and the agglomerate (ii), and (b) an inorganic substance (II) selected from the group consisting of (iv) an amorphous substance consisting essentially of Si, M and O, (v) a crystal agglomerate consisting essentially of crystalline SiO2 and MO2, and (iv) a mixture of the amorphous substance (iv) and the crystal agglomerate (v), wherein M is Ti or Zr and x is a number of more than 0 to less than 1. Due to its high uniformity and high strength, the sinter is used mainly for internal combustion engine parts such as a piston ring and an auxiliary combustion chamber, and rocket engine parts such as a nose cone and a nozzle.

公开(公告)号：DE3170050D1

公开(公告)日：1985-05-23

申请号：DE3170050

申请日：1981-12-16

Applicant: UBE INDUSTRIES

Inventor： YAJIMA SEISHI TOHOKU DAIGAKU S ,  OKAMURA KIYOHITO TOHOKU DAIGAK ,  HASEGAWA YOSHIO ,  YAMAMURA TAKEMI

IPC: C04B35/571 ,  C04B35/622 ,  C08G77/60 ,  C01B31/36 ,  C04B35/00 ,  C04B35/56 ,  C08G81/00 ,  C08G79/00 ,  C08G77/42 ,  D01F9/10

Abstract: Continuous inorganic fibers consisting substantially of Si, Zr and C and optionally of O, said fibers being composed of (1) an amorphous material consisting substantially of Si, Zr and C and optionally of O, or (2) an aggregate consisting substantially of ultrafine crystalline particles of beta -SiC, ZrC, a solid solution of beta -SiC and ZrC and ZrC1-x wherein 0

公开(公告)号：DE3066769D1

公开(公告)日：1984-04-05

申请号：DE3066769

申请日：1980-11-28

Applicant: UBE INDUSTRIES

Inventor： YAJIMA SEISHI TOHOKU DAIGAKU S ,  OKAMURA KIYOHITO TOHOKU DAIGAK ,  HASEGAWA YOSHIO ,  YAMAMURA TAKEMI

IPC: C04B35/571 ,  C04B35/589 ,  C04B35/63 ,  C04B35/56 ,  C01B31/30 ,  C08G81/00

Abstract: A process for producing a sintered ceramic body, which comprises heating a semi-inorganic block copolymer at a temperature of from 500 DEG to 2300 DEG C. in an environment of vacuum or inert gases, reducing gases or hydrocarbon gases, said copolymer comprising polycarbosilane blocks, having a main-chain skeleton composed mainly of carbosilane units of the formula -Si-CH2- and titanoxane units of the formula -Ti-O-; and shaping the heated product, and simultaneously with, or after, the shaping of the heated product, sintering the shaped product at a temperature of from 800 DEG C. to 2300 DEG C. in an environment of vacuum or inert gases, reducing gases or hydrocarbon gases; and a sintered ceramic body consisting substantially of Si, Ti and C and optionally of O, said sintered by being composed substantially of (1) an amorphous material consisting substantially of Si, Ti and C and optionally of O, or (2) an aggregate consisting substantially of ultrafine crystalline particles of beta -SiC, TiC, a solid solution of beta -SiC and TiC and TiC1-x wherein 0

公开(公告)号：CA1161068A

公开(公告)日：1984-01-24

申请号：CA373752

申请日：1981-03-24

Applicant: UBE INDUSTRIES

Inventor： YAJIMA SEISHI ,  OKAMURA KIYOHITO ,  HASEGAWA YOSHIO ,  YAMAMURA TAKEMI

IPC: C04B35/571 ,  C04B35/63 ,  C08G77/398 ,  C04B35/56

Abstract: Title of the Invention SINTERED CERAMIC BODY AND PROCESS FOR PRODUCTION THEREOF A process for producing a sintered ceramic body, which comprises heating a semi-inorganic block copolymer at a temperature of from 500 to 2300.degree.C in an environment of vacuum or inert gases, reducing gases or hydrocarbon gases, said copolymer comprising polycarbosilane blocks having a main-chain skeleton composed mainly of carbosilane units of the formula ?Si-CH2? and zirconoxane units of the formula ?Zr-0? ; and shaping the heated product, and simultaneously with, or after, the shaping of the heated product, sintering the shaped product at a temperature of from 800.degree.C to 2300.degree.C in an environment of vacuum or inert gases, reducing gases or hydrocarbon gases; and a sintered ceramic body consisting substantially of Si, Zr and C and optionally of 0, said sintered body being composed substantially of (1) an amorphous material consisting substantially of Si, Zr and C and optionally of 0, or (2) an aggregate consisting substantially of ultrafine crystalline particles of .beta.-SiC, ZrC, a solid solution of .beta.-SiC and ZrC and ZrC1-x wherein 0

公开(公告)号：GB2259299B

公开(公告)日：1996-01-10

申请号：GB9217150

申请日：1992-08-13

Applicant: UBE INDUSTRIES

Inventor： HIRATUKA TOORU ,  YAMAMURA TAKEMI ,  SHIBUYA MASAKI ,  OHTSUBO HIDEKI

IPC: C03C14/00 ,  C04B35/80 ,  C04B35/64 ,  B32B18/00

Abstract: An inorganic fiber sinter comprises an inorganic substance (I) selected among the following members (i) to (iii) and an inorganic substance (II) disposed between the above substances (I) which is selected among the following members (iv) to (vi): (i) an amorphous substance consisting substantially of Si, M, C and O, (ii) an agglomerate consisting substantially of crystalline ultrafine particles comprising beta -SiC, MC, solid solution of beta -SiC with MC and/or MC1-x, and amorphous SiO2 and MO2, and (iii) a mixture of the above substance (i) and agglomerate (ii). (iv) an amorphous substance consisting substantially of Si, M and O, (v) a crystal agglomerate consisting of crystalline SiO2 and MO2, and (vi) a mixture of the above substance (iv) and agglomerate (v), wherein M is Ti or Zr and x is a number of more than 0 to less than 1. In another embodiment, M, MC, MC1-x, and MO2 are not present in (i) to (vi).