Methods of providing high purity SiOC and SiC materials
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 . A method of making silicon oxycarbide, the method comprising:
a. distilling a liquid comprising silicon, carbon and oxygen;
b. curing the liquid to a cured material; and,
c. transforming the cured material to a ceramic material consisting essentially of silicon, carbon and oxygen and being in the form of a powder; wherein the ceramic material powder has a hardness; and
d. further comprising forming the ceramic material powder into a volumetric shape, the volumetric shape having a hardness of less than ⅓ the hardness of the ceramic material powder.
2 . The method of claim 1 , comprising forming the ceramic material powder into a shape selected from the group of shapes consisting of pucks, briquettes, bricks, pills and tables.
3 . The method of claim 1 , wherein the hardness of the volumetric shape is less than ¼ the hardness of the ceramic material powder.
4 . The method of claim 1 , wherein the ceramic material is at least 99.99% pure.
5 . The method of claim 1 , wherein the ceramic material is at least 99.999% pure.
6 . The method of claim 1 , wherein the ceramic material is at least 99.9999% pure.
7 . The method of claim 1 , wherein the ceramic material has less than about 100 ppm Al.
8 . The method of claim 1 , wherein the ceramic material has less than about 10 ppm Al.
9 . The method of claim 1 , wherein the silicon carbide has less than about 1 ppm Al.
10 . The method of claim 1 , wherein the silicon carbide has less than about 100 ppm B.
11 . The method of claim 1 , wherein the ceramic material has less than about 3,000 ppm total of the elements selected from the group consisting of Al, Fe, B, P, Pt, Ca, Mg, Li, Na, Ni, V, Pr, Ce, Cr, S and As.
12 . The method of claim 1 , wherein the ceramic material has less about 500 ppm total of the elements selected from the group consisting of Al, Fe, B, P, Pt, Ca, Mg, Li, Na, Ni, V, Pr, Ce, Cr, S and As.
13 . The method of claim 1 , wherein the ceramic material has less about 50 ppm total of the elements selected from the group consisting of Al, Fe, B, P, Pt, Ca, Mg, Li, Na, Ni, V, Pr, Ce, Cr, S and As.
14 . The method of claim 1 , wherein off-gasses are generated, collected and handled.