POLYSILOCARB BASED SILICON CARBIDE MATERIALS, APPLICATIONS AND DEVICES
Organosilicon chemistry, polymer derived ceramic materials, and methods. Such materials and methods for making polysilocarb (SiOC) and Silicon Carbide (SiC) materials having 3-nines, 4-nines, 6-nines and greater purity. Processes and articles utilizing such high purity SiOC and SiC.
1 - 32 . (canceled)
33 . A method of making silicon carbide, the method comprising:
a. providing a liquid including silicon, carbon and oxygen; wherein the liquid comprises a polysilocarb precursor formulation having a molar ratio of about 30% to 85% carbon, about 5% to 40% oxygen, and about 5% to 35% silicon; wherein the liquid material has less than about 100 ppm total of the elements selected from the group consisting of Al, Fe, B, and P;
b. curing the liquid to a cured material consisting essential of silicon, carbon and oxygen; wherein the cured material has less than about 100 ppm total of the elements selected from the group consisting of Al, Fe, B and P;
c. transforming the cured material to a ceramic material including silicon, carbon and oxygen; wherein the ceramic material has less than about 100 ppm total of the elements selected from the group consisting of Al, Fe, B and P; and,
d. removing essentially all of the oxygen from the ceramic material; whereby SiC is provided; wherein the SiC has less than about 100 ppm total of the elements selected from the group consisting of Al, Fe, B, and P.
34 . The method of claim 33 , wherein the silicon carbide is polycrystalline.
35 . The method of claim 33 , wherein the silicon carbide is mono-crystalline.
36 . The method of claim 33 , wherein the silicon carbide comprises more than 99% alpha type.
37 . The method of claim 33 , wherein the silicon carbide comprises more than 50% beta type.
38 . The method of claim 33 , wherein the silicon carbide is in a shape selected from the group of shapes consisting of pucks, briquettes, bricks, pills, discs and tablets.
39 . The method of claim 33 , wherein the silicon carbide is in a volumetric shape, the volumetric shape having a hardness of less than ⅓ the hardness of the silicon carbide.
40 . The method of claim 33 , wherein the silicon carbide is in a volumetric shape, the volumetric shape having a hardness of less than ⅓ the hardness of the silicon carbide; and wherein the silicon carbide comprises more than 50% beta type.
41 . The method of claim 33 , wherein the liquid comprises a polysilocarb precursor formulation having a molar ratio of about 50% to 65% carbon, about 20% to 30% oxygen, and about 15% to 20% silicon.
42 . The method of claim 41 , wherein the silicon carbide is polycrystalline.
43 . The method of claim 41 , wherein the silicon carbide is mono-crystalline.
44 . The method of claim 41 , wherein the silicon carbide comprises more than 99% alpha type.
45 . The method of claim 41 , wherein the silicon carbide comprises more than 50% beta type.
46 . The method of claim 41 , wherein the silicon carbide is in shape selected from the group of shapes consisting of pucks, briquettes, bricks, pills and tablets.
47 . The method of claim 41 , wherein the silicon carbide is in a volumetric shape, the volumetric shape having a hardness of less than ⅓ the hardness of the silicon carbide.
48 . The method of claim 41 , wherein the silicon carbide is in a volumetric shape, the volumetric shape having a hardness of less than ⅓ the hardness of the silicon carbide; and wherein the silicon carbide comprises more than 50% beta type.
49 - 84 . (canceled)