EP0213629A2
Expired / Lapsed
EP
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Process for the production of inorganic fibers
Assignee: Mitsubishi Chemical Corp
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Filing: 1986-09-01
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Granted: —
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Expires: 2006-09-01
Abstract
Abstract An inorganic fiber composed essentially of fine crystals of an aluminum compound, which contains at least l0% by weight of aluminium nitride and the rest of the aluminum compound being alumina.
Inventors
- 👤 Yasuo Oguri
- 👤 Mitsuru Awata
- 👤 Hozumi Endo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 21:26
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; C04B35/62236; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0366; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
31 words
An inorganic fiber composed essentially of fine crystals of an aluminum compound, which contains at least l0% by weight of aluminum nitride and the rest of the aluminum compound being alumina.
Claim 2
Dependent Claim
31 words
An inorganic fiber composed essentially of fine crystals of an aluminum compound, which contains at least l0% by weight of aluminum nitride and the rest of the aluminum compound being alumina.
Claim 3
Dependent Claim
33 words
The inorganic fiber according to Claim l, wherein the content of the aluminum compound is at least 95% by weight and the content of other inorganic compounds is less than 5% by weight.
Claim 4
Dependent Claim
19 words
The inorganic fiber according to Claim 2, wherein the content of aluminum nitride is at least 50% by weight.
Claim 5
Dependent Claim
31 words
The inorganic fiber according to Claim 3, which has a diameter of not more than 20 µ m and a ratio of the length to the diameter being at least 50.
Claim 6
Dependent Claim
35 words
An inorganic fiber composed essentially of fine crystals of aluminum nitride, which has a diameter of not more than 20 µ m and a ratio of the length to the diameter being at least 50.
Claim 7
Dependent Claim
35 words
An inorganic fiber composed essentially of fine crystals of aluminum nitride, which has a diameter of not more than 20 µ m and a ratio of the length to the diameter being at least 50.
Claim 8
Dependent Claim
97 words
A process for producing inorganic fibers composed essentially of fine crystals of an aluminum compound and containing at least l0% by weight of aluminum nitride, which comprises spinning a viscous solution comprising an aluminum compound and an organic polymer compound to obtain precursory fibers in which the atomic ratio of organic carbon to aluminum is at least 0.5; and heating the precursory fibers at a temperature of at least l000°C in a non-oxidizing atmosphere comprising a gas selected from the group consisting of nitrogen and ammonia to convert at least a part of aluminum to aluminum nitride.
Claim 9
Dependent Claim
97 words
A process for producing inorganic fibers composed essentially of fine crystals of an aluminum compound and containing at least l0% by weight of aluminum nitride, which comprises spinning a viscous solution comprising an aluminum compound and an organic polymer compound to obtain precursory fibers in which the atomic ratio of organic carbon to aluminum is at least 0.5; and heating the precursory fibers at a temperature of at least l000°C in a non-oxidizing atmosphere comprising a gas selected from the group consisting of nitrogen and ammonia to convert at least a part of aluminum to aluminum nitride.
Claim 10
Dependent Claim
67 words
The process according to Claim 6, wherein after heating the precursory fibers at a temperature of at least l000°C in a non-oxidizing atmosphere comprising a gas selected from the group consisting of nitrogen and ammonia to convert at least a part of aluminum to aluminum nitride, the fibers are heated at a temperature of from 500 to 700°C in an oxidizing atmosphere to remove carbon contained therein.
References Cited (Backward Citations)
No citation records indexed.
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