Claims
- 1. A method for producing a continuous inorganic fiber consisting essentially of Si, N and O in a composition ratio wherein the atomic ratio of N/Si is 1.3/0.5 and that of O/Si is 1.0/0.05; which comprises:
- (a) spinning a fiber from a polycarbosilane having a molecular weight of 800-50,000;
- (b) heating the spun fiber in an oxidizing atmosphere at 50.degree.-400.degree. C. or irradiating the spun fiber in an oxidizing atmosphere with 10.sup.6 -10.sup.10 R of the .gamma.-ray radiation or 10.sup.7 -10.sup.10 Rad electron beam radiation to form an infusible fiber; and
- (c) heating the infusible fiber at a temperature of 800.degree.-1,650.degree. C. in a stream of ammonia gas.
- 2. A method according to claim 1, wherein the fiber is spun from molten polycarbosilane.
- 3. A method according to claim 1, wherein the fiber is spun from a solution containing the polycarbosilane.
- 4. A method according to claim 1, wherein the stream of ammonia gas is a flow rate of at least 50 cc/min.
- 5. A method according to claim 1 wherein the spun fiber is heated in an oxidizing atmosphere under a tension of 1-500 g/mm.sup.2 or irradiated under a tension of 1-500 g/mm.sup.2.
- 6. A method according to claim 1, wherein the infusible fiber is heated in a stream of ammonia gas under a tension of 1-5000 g/mm.sup.2.
- 7. A method according to claim 1, comprising the further step of heating the fiber at a temperature of 800.degree.-1,650.degree. C. in an inert atmosphere.
- 8. A method for producing a continuous inorganic fiber consisting essentially of Si, N and O in a composition ratio wherein the atomic ratio of N/Si is 1.3/0.5 and that of O/Si is 1.0/0.05, which comprises:
- (a) spinning a fiber from polycarbosilane having a molecular weight of 800-50,000;
- (b) heating the spun fiber in an oxidizing atmosphere at 50.degree.-400.degree. C. or irradiating the spun fiber in an oxidizing atmosphere with 10.sup.6 -10.sup.10 R of .gamma.-ray radiation or 10.sup.7 -10.sup.10 Rad electron beam radiation under a tension of 1-500 g/mm.sup.2 to form an infusible fiber; and
- (c) heating the infusible fiber under a tension of 1-5000 g/mm.sup.2 at a temperature of 800.degree.-1,650.degree. C. in a stream of ammonia gas at a flow rate of at least 50 cc/min.
Priority Claims (1)
Number |
Date |
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59-129145 |
Jun 1984 |
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Parent Case Info
This application is a continuation of application Ser. No. 207,934, filed June 17, 1988, which is a continuation of Ser. No. 936,394, filed Dec. 1, 1986, now both abandoned, which is a division of Ser. No. 727,816, filed Apr. 26, 1985, now U.S. Pat. No. 4,650,733.
US Referenced Citations (21)
Foreign Referenced Citations (5)
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Jul 1961 |
DEX |
2236078 |
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FRX |
717555 |
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GBX |
954285 |
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Non-Patent Literature Citations (4)
Entry |
Suzuki, H. et al., Yogyo Kyokai Shi, vol. 75 (1957), pp. 111-112, "On Nitriding Reactions in the Silicon-Silica System", [English Language Abstract of Reference Cited in IDS Filed Jul. 10, 1987]. |
Fritz, Von G., Angewandte Chemie, vol. 79 (1967), pp. 657-658 [English Translation: Angew. Chem. Internat. Edit./vol. 6, No. 8, pp. 677-683, "Formation and Properties of Carbosilanes", [Translation of Reference Originally Cited in IDS Filed Jul. 10, 1987]. |
Zeitschrift fur Anorganische und Allegemeine Chemie, vol. 321 (1963), pp. 10-11 [English Language Abstract Provided=Chemical Abstracts, vol. 59 (1963), col. 5186, [English Language Abstract of Reference Originally Cited in IDS Filed Jul. 10, 1987]. |
Chemistry Letters, No. 12, Dec. 1984, pp. 2059-2060, Okamura et al., "The Synthesis of Silicon Oxynitride Fibers by Nitridation of Polycarbosilane". |
Divisions (1)
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727816 |
Apr 1985 |
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Continuations (2)
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Number |
Date |
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207934 |
Jun 1988 |
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Parent |
936394 |
Dec 1986 |
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