Patent EP0175384A2 successfully refreshed from Google Patents.
EP0175384A2
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Ceramic materials with increased crystallinity from silazane polymers
Assignee: Dow Silicones Corp
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Filing: 1985-09-20
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Granted: —
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Expires: 2005-09-20
Abstract
Abstract A method of preparing ceramic materials with increased levels of crystalline SiC and/or Si 3 N 4 is described. The method consists of firing a mixture of a R 3 SiNH-containing silazane polymer and an inorganic compound selected from the group consisting of iron compounds, cobalt compounds, nickel compounds, and copper compounds to an elevated temperature of at least 750°C under an inert atmosphere or in a vacuum until a ceramic material with increased levels of crystalline SiC and/or Si 3 N 4 is obtained.
Inventors
- 👤 Ronald Howard Baney
- 👤 Duane Ray Bujalski
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 18:28
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/515; C04B35/56; C04B35/565; C04B35/571; C04B35/58; C04B35/584; C04B35/589; C04B41/45; C04B41/50; C04B41/5053; C08; C08K; C08K3/00; C08K3/10; C08K3/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A method of preparing a ceramic material with increased crystallinity, said method comprising heating a modified R 3 SiNH-containing silazane polymer in an inert atmosphere or in a vacuum to a temperature of at least 750°C until said modified R 3 SiNH-containing silazane polymer is converted to a ceramic.material with increased crystallinity relative to a non-modified R 3 SiNH-containing silazane polymer heated under the same conditions, wherein said modified R 3 SiNH-containing silazane polymer is prepared by mixing the non-modified R 3 SiNH-containing silazane polymer with an effective, crystallinity increasing, amount of an inorganic compound selected from the group consisting of iron compounds, cobalt compounds, nickel compounds, and copper compounds.
Claim 2
Independent Claim
110 words
A method of preparing a ceramic material with increased crystallinity, said method comprising heating a modified R 3 SiNH-containing silazane polymer in an inert atmosphere or in a vacuum to a temperature of at least 750°C until said modified R 3 SiNH-containing silazane polymer is converted to a ceramic.material with increased crystallinity relative to a non-modified R 3 SiNH-containing silazane polymer heated under the same conditions, wherein said modified R 3 SiNH-containing silazane polymer is prepared by mixing the non-modified R 3 SiNH-containing silazane polymer with an effective, crystallinity increasing, amount of an inorganic compound selected from the group consisting of iron compounds, cobalt compounds, nickel compounds, and copper compounds.
References Cited (Backward Citations)
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