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US 11,685,662 B2Granted
Coal based silicon carbide foam
AssigneeTouchstone Research Laboratory, Ltd.
InventorsDwayne R. Morgan, Frederick H. Wade
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Abstract
A method for producing silicon carbide directly from comminuted coal and a silicon precursor is described. The process includes coating comminuted coal with a silicon precursor and heating the silicon precursor coated comminuted coal to initially form polymerized preceramic silicon-carbon foam and then further heating to form silicon carbide foam.
Claims6
A method for producing a silicon carbide comprising the steps of:
- providing a liquid silicon precursor;
- adding comminuted coal to the liquid silicon precursor to form silicon precursor coated comminuted coal;
- heating the silicon precursor coated comminuted coal under controlled pressure to a temperature sufficient to form a polymerized preceramic foam;
- and
- continued heating to a temperature sufficient for at least a portion of the polymerized preceramic foam to react with carbon in the foam to form silicon carbide.
2 more elements
Dependencies are inferred from the claim text.