公开(公告)号：JPH11256429A

公开(公告)日：1999-09-21

申请号：JP6237498

申请日：1998-03-13

Applicant: UBE INDUSTRIES

Inventor： SHIBUYA MASAKI

IPC: C04B41/87 ,  C04B20/10 ,  C04B41/89 ,  D01F8/18 ,  D01F9/10 ,  D06M11/00 ,  D06M11/73 ,  D06M101/00

Abstract: PROBLEM TO BE SOLVED: To produce an inorganic fiber suitably usable as a reinforcing fiber of various composite materials by coating a fiber surface of a silicon carbide- based inorganic fiber with a thick carbon layer and providing a thick gradient compositional part between the carbon layer and the silicon carbide-based inorganic fiber and to provide a method for producing the inorganic fiber. SOLUTION: This inorganic fiber is a silicon carbide-based inorganic fiber coated with carbon and has a gradient compositional part having at least 100 nm thickness between a coating carbon layer and the silicon carbide-based inorganic fiber. The silicon carbide-based inorganic fiber is heat-treated in carbon monoxide containing carbon dioxide.

公开(公告)号：JPH11171658A

公开(公告)日：1999-06-29

申请号：JP33564197

申请日：1997-12-05

Applicant: UBE INDUSTRIES

Inventor： SHIBUYA MASAKI ,  ISHIKAWA TOSHIHIRO

IPC: C04B35/80

Abstract: PROBLEM TO BE SOLVED: To obtain a crystalline silicon carbide-based fiber reinforced ceramic composite material having excellent strength, modulus of elasticity and creep characteristics. SOLUTION: This composite material comprises a crystalline silicon carbide- based fiber having >=2.7 g/cm density, >=2 GPa strength and >=250 GPa modulus of elasticity and composed of SiC sintered structure as reinforcing fibers and a ceramic as a matrix. Preferably the composite material comprises a crystalline silicon carbide-based fiber having >=2.7 g/cm density, constituted of 55-70 wt.% of Si, 28-45 wt.% of C, 0.06-3.8 wt.% of Al and 0.06-0.5 wt.% of B and composed of SiC sintered structure as reinforcing fibers and a ceramic as a matrix.

公开(公告)号：JP2514424B2

公开(公告)日：1996-07-10

申请号：JP7377189

申请日：1989-03-28

Applicant: UBE INDUSTRIES

Inventor： YAMAMURA TAKETAMI ,  KUGIMOTO JUNICHI ,  ISHIKAWA TOSHIHIRO ,  SHIOJI YASUHIRO ,  SHIBUYA MASAKI

IPC: C08L83/16 ,  C08G61/00 ,  C08G77/48 ,  C08G77/60 ,  C08L65/00 ,  C08L83/02 ,  C08L83/04 ,  D01F6/76 ,  D01F9/10 ,  D01F9/145

公开(公告)号：JPH06283728A

公开(公告)日：1994-10-07

申请号：JP6808793

申请日：1993-03-26

Applicant: UBE INDUSTRIES

Inventor： FUJII KAZUHIRO ,  YASUMURA MORIHITO ,  SHIBUYA MASAKI ,  ABU TOSHIHIKO

IPC: H01L29/861 ,  H01L29/91

Abstract: PURPOSE:To provide the title rectifying element with a rectifying property even at high temperatures by forming a structure wherein a silver electrode is attached to one side of an inorganic body which is composed of Si, C, M (where M represents Ti or Zr) and O and an Al electrode is attached to the other side. CONSTITUTION:A Tirano fiber available on the market is heated and treated, and raw-material inorganic fibers are obtained. The thickness of their surface layer is 200nm. They are stacked, a sheetlike laminate in 50X100X100mm is formed, the laminate is set in a carbon die, it is hot-pressed in an argon aerial current under a pressure of 600kg/cm , and a sintered body is manufactured. The sintered body which has been obtained is cut off, one end of the cut-off sintered body is coated with a paste composed mainly of silver, the other end is coated with a paste composed mainly of Al, and a sample is prepared. When the Al side is set to be positive, a current hardly flows. A current density is at 2.0 A/cm in a state that a voltage of 10V is applied. The temperature on the surface of an element at this time is at about 540 deg.C.When the Ag side is set to be negative, the current flows easily. Consequently, a rectifying element is provided with a rectifying property at a high temperature of 250 deg.C or higher.

公开(公告)号：JPH06283304A

公开(公告)日：1994-10-07

申请号：JP6808693

申请日：1993-03-26

Applicant: UBE INDUSTRIES

Inventor： FUJII KAZUHIRO ,  YASUMURA MORIHITO ,  SHIBUYA MASAKI ,  ABU TOSHIHIKO

IPC: C04B35/80 ,  H01C7/00

Abstract: PURPOSE:To use a resistor element at a high temperature by constituting the element by sticking electrodes to an inorganic body composed of Si, C, and O. CONSTITUTION:This element is constituted by sticking electrodes to an inorganic body composed of Si, C, and O or Si, C, M (M: Ti or Zr), and O. A molded body of a crystalline or amorphous ceramic composed of Si, C, and O or Si, C, M (M: Ti or Zr), and 0 is used as the inorganic body. The crystalline ceramic can be a fibrous crystal aggregate composed of a sintered Si-C-O ceramic, at least one kind selected from among massive, flaky, and acicular SiC crystals, and mirocrystals of SiC and TiC (or ZrC). The amorphous ceramic can be a fibrous amorphous inorganic sintered body. Therefore, a resistance element which has ohmic characteristics even at a high temperature and a strong strength and can be used at a high temperature can be obtained.

公开(公告)号：JPH0578174A

公开(公告)日：1993-03-30

申请号：JP31125491

申请日：1991-09-18

Applicant: UBE INDUSTRIES

Inventor： YAMAMURA TAKETAMI ,  SHIBUYA MASAKI ,  OTSUBO HIDEKI ,  HIRATSUKA TORU

IPC: C04B35/565 ,  C04B35/56 ,  C04B35/80

Abstract: PURPOSE:To obtain an inorganic fiber sintered compact having high strength and toughness by thermally sintering a laminate composed of inorganic fiber composed of Si-C-O and an inorganic substance, present in the interface of the fiber and composed of Si-O. CONSTITUTION:A laminate of inorganic fiber composed of the following inner surface layer and a surface layer is thermally sintered within the temperature range of 1400-1900 deg.C to afford the objective sintered compact. The inner surface layer is constructed of (i) an amorphous substance composed of Si, C and O, (ii) an aggregate composed of crystalline grains, composed of beta-SiC and having

公开(公告)号：JPH04370222A

公开(公告)日：1992-12-22

申请号：JP17907091

申请日：1991-04-19

Applicant: UBE INDUSTRIES

Inventor： YAMAMURA TAKETAMI ,  ISHIKAWA TOSHIHIRO ,  SHIBUYA MASAKI

IPC: C04B35/565 ,  C04B35/56 ,  D01F9/10

Abstract: PURPOSE:To produce the subject fiber comprising silicon, carbon, titanium, zirconium and oxygen and suitable as a reinforcing fiber for composite materials by melt-spinning a polytitanocarbosilane or polyzirconocarbosilane, converting the spun fiber into an infusible fiber and subsequently sintering the fiber under a specific condition. CONSTITUTION:A polytitanocarbosilane or polyzircocarbosilane is melt-spun and subsequently heated in an oxidative gas atmosphere to form an infusible fiber. The infusible fiber is fed into a continuous sintering oven and sintered in an inert gas atmosphere such as argon or in vacuum at the maximum sintering temperature of 800 to 2000 deg.C in a state that a temperature gradient is formed in the traveling direction of the infusible fiber in the oven, thus providing the objective fiber composed of an inner layer comprising 40-60wt.% of silicon, 20-40wt.% of carbon, 0.5-10wt.% of titanium or zirconium and 10-30wt.% of oxygen and a surface layer comprising 0-40wt.% of silicon, 50-100wt.% of carbon, 0-8wt.% of titanium or zirconium and 0-25wt.% of oxygen.

公开(公告)号：JPH0411664B2

公开(公告)日：1992-03-02

申请号：JP26365386

申请日：1986-11-07

Applicant: UBE INDUSTRIES

Inventor： YAMAMURA TAKETAMI ,  ISHIKAWA TOSHIHIRO ,  SHIBUYA MASAKI

IPC: B29B11/16 ,  C08J5/06 ,  C22C47/00 ,  C22C49/00 ,  C22C49/04 ,  C22C49/06 ,  C22C49/11 ,  D01F9/10 ,  D01F11/00 ,  D06M11/00 ,  D06M11/32 ,  D06M11/77 ,  D06M23/08 ,  D06M23/10 ,  D06M101/00 ,  D06M101/40

公开(公告)号：JPH03270128A

公开(公告)日：1991-12-02

申请号：JP6837290

申请日：1990-03-20

Applicant: UBE INDUSTRIES

Inventor： YAMAMURA TAKETAMI ,  ISHIKAWA TOSHIHIRO ,  SHIBUYA MASAKI

IPC: H01L21/22

Abstract: PURPOSE:To prevent or remarkably suppress deterioration in mechanical strength even after repeated use under a high temperature by forming a coating layer of silicon carbide by means of a chemical vapor phase deposition method on a composite base material, in which a matrix consisting of silicon carbide or silicon nitride is strengthened by inorganic fibers consisting of carbon, tita nium or zirconium and oxygen. CONSTITUTION:A matrix consisting of silicon carbide or silicon nitride, is rein forced by inorganic fibers consisting of silicon, carbon, titanium, or zirconium and oxygen to produce a composite material having good adhesiveness to the matrix and can be employed, as it is, as reinforcing fibers for the matrix. A composite base material is so prepared that bulk materials are conditioned by a method where inorganic fibers are mixed, with or buried in matrix powder, or a method where inorganic fibers and matrix powder are alternately arranged, and these are molded by pressing into a shape of a process tube followed by baking, or the bulk materials are heated while being pressed by a hot press baking method. A coating layer of silicon carbide is formed on the surface of this composite base material by a chemical vapor phase deposition method.

公开(公告)号：JPH03234821A

公开(公告)日：1991-10-18

申请号：JP2827390

申请日：1990-02-09

Applicant: UBE INDUSTRIES

Inventor： YAMAMURA TAKETAMI ,  KUGIMOTO JUNICHI ,  ISHIKAWA TOSHIHIRO ,  SHIOJI YASUHIRO ,  SHIBUYA MASAKI

IPC: C04B35/565 ,  C04B35/52 ,  C04B35/56 ,  D01F9/10 ,  D01F9/14

Abstract: PURPOSE:To obtain a carbon-based inorganic yarn having the same modulus of elasticity as that of pitch yarn, excellent strength, oxidation resistance and wetting to matrix by spinning a specific silicon-containing polycyclic aromatic polymer, infusibilizing and burning. CONSTITUTION:A silicon-containing polycyclic aromatic polymer which is a thermal reaction product, at 200-500 deg.C, of 100 pts.wt. random copolymer wherein silicon of an organosilicon polymer comprising a carbosilane shown by formula I (R1 is H or CH3) and a silastyrene shown by formula II (R2 and R3 are CH3, phenyl or H) in a ratio of (7:3)-(3:7) is at least partially bonded through an aromatic ring of pitch (and heat-treated material thereof) and silicon carbon connecting group and 5-50,000 pts.wt. polycyclic aromatic compound in a mesophase state (and in an optically isotropic state) obtained by heat-treating pitch is spun, infusibilized and burnt in vacuum or in an inert gas atmosphere at 800-3,000 deg.C.