-
-
2.发明专利
公开(公告)号：JP3598726B2
公开(公告)日：2004-12-08
申请号：JP9714797
申请日：1997-04-15
Applicant: 宇部興産株式会社
IPC: C04B35/565 , C04B35/80 , D01F9/10
Abstract: PROBLEM TO BE SOLVED: To provide a SiC-based composite material having a high strength and a toughness value and exhibiting excellent oxidation resistance in a wide temperature range, and to provide a method for producing the same. SOLUTION: This SiC-based composite material of fiber-bound type ceramic comprises inorganic fibers containing (a) an amorphous substance substantially comprising Si, M, C and O, (b) the aggregate of crystalline ultrafine particles substantially comprising β-SiC, MC and C with an amorphous substance substantially comprising SiO2 and MO2 wherein M is Ti or Zr or (c) the mixture of the component (a) with the component (b), and an inorganic substance containing (d) an amorphous substance comprising Si, O and M, (e) a crystal aggregate comprising crystalline SiO2 and MO2 or (f) the mixture of the component (d) with the component (e), and containing crystalline particles comprising MC having a particle diameter of
-
3.发明专利
公开(公告)号：JP4058955B2
公开(公告)日：2008-03-12
申请号：JP2002029616
申请日：2002-02-06
Applicant: 宇部興産株式会社
IPC: C04B35/573 , C04B41/85 , C04B35/16 , C04B35/622
Abstract: PROBLEM TO BE SOLVED: To provide a ceramic having a surface layer with a gradient composition, which has excellent functions such as photocatalytic functions, electrical functions, thermo-catalytic functions or a function as a catalyst carrier, or environmental resistance such as oxidation resistance, alkali resistance or wear resistance, and excellent mechanical properties, and to provide a method of producing the same. SOLUTION: The ceramic comprises a composite phase which is constituted of a first phase mainly comprising silicon-based ceramic components and a second phase mainly comprising ceramic components other than the ceramic components in the first phase, and the present ratio of fine crystalline particles of at least one kind of the ceramic components constituting the second phase is increased in a gradient manner toward the surface layer. COPYRIGHT: (C)2003,JPO
-
Patent Agency Ranking
公开(公告)号：JP3767170B2
公开(公告)日：2006-04-19
申请号：JP14523398
申请日：1998-05-27
Applicant: 宇部興産株式会社
IPC: C04B35/565 , C04B35/80 , D01F9/10
Abstract: PROBLEM TO BE SOLVED: To provide a ceramic composite material hardly broken and having a high elastic modulus and an excellent high temperature strength capable of bearing even under ultra high temperatures exceeding 1,400 deg.C, and to provide a method for producing the same. SOLUTION: This sintered SiC fiber-bound product has an elastic modulus of >=200 Gpa and a density of >=2.7 g/cm and has a structure in which inorganic fibers are bound to each other in a state extremely close to the closest packed state and in which boundary layers containing 1-50 nm carbon as a main component are formed between the fibers. The inorganic fibers consists mainly of the sintered structures of SiC and contains at least one kind of metal atoms selected from the group consisting of metal atoms of the groups 2A, 3A and 3B.
-
-
6.发明专利
-
-
-
-
-
-
Search Results
8
records
(took 0.031 seconds)
