Geothermal energization of a non-combustion chemical reactor and associated systems and methods
US-9222704-B2 · Dec 29, 2015 · US
Stiochiometric silicon carbide fibers from thermo-chemically cured polysilazanes
US9045347B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9045347-B2 |
| Application number | US-201113037151-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 28, 2011 |
| Priority date | Feb 26, 2010 |
| Publication date | Jun 2, 2015 |
| Grant date | Jun 2, 2015 |
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Abstract
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A novel polycrystalline stoichiometric fine SiC fiber substantially free of impurities is produced using a novel pre-ceramic polymer. The pre-ceramic polymer is prepared by reacting a mixture of chlorodisilane, boron trichloride, and a vinyl chlorodisilane with an excess of hexamethyldisilazane to form the pre-ceramic polymer resin, which may then be melt-spun, cured, pyrolyzed and heat-treated to obtain the finished SiC fiber. The manufacturing process for the production of the fine SiC ceramic fiber allows for flexibility with respect to cross-linking, in that low-cost thermal treatments may replace more complex methods, while obtaining fibers with improved materials properties as compared to currently available SiC fibers.
First claim
Opening claim text (preview).
What is claimed is: 1. A method comprising: reacting a mixture of chlorodisilane (CDS), boron trichloride, and a vinyl chlorodisilane with hexamethyldisilazane (HMDS) to form a pre-ceramic polymer resin. 2. The method of claim 1 , wherein the mixture further comprises a compound selected from the group consisting of 1,1,3,3, tetraphenyldisilazane and 1,3 divinyltetramethyldisilazane, in the range of 5 to 35 percent by weight. 3. The metho…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US9045347B2 cover?
- A novel polycrystalline stoichiometric fine SiC fiber substantially free of impurities is produced using a novel pre-ceramic polymer. The pre-ceramic polymer is prepared by reacting a mixture of chlorodisilane, boron trichloride, and a vinyl chlorodisilane with an excess of hexamethyldisilazane to form the pre-ceramic polymer resin, which may then be melt-spun, cured, pyrolyzed and heat-treated…
- Who is the assignee on this patent?
- Pope Edward J A, Hill Christopher L, Brabham Carl N, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification C01B31/36. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 02 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).