High-temperature treatment melts impurities on SiC waste so mechanical fractionation can recover powder with at least 98% purity.
Wet-treated rice hull bio-silica is calcined, micronized, and granulated to cut impurities, lower furnace demand, and raise silicon and SiC yield.
Low-temperature free-radical crosslinking of a boron-containing resin boosts ceramic yield to 80% or more while reducing shrinkage and porosity.