Because of its high Al₂O�?information and reduced impurity stages, it outperforms fireclay bricks in this facet High alumina brick refractories might have two bond systems, ceramic, and phosphate. Phosphate brick is readily acknowledged by a phosphorus pentoxide (P2O5) information on their own data sheet of among about 3% and 6%. https://travisppomj.tinyblogging.com/the-fact-about-ceramic-melting-dish-that-no-one-is-suggesting-83618191