Resulting From its high Al₂O�?content and low impurity amounts, it outperforms fireclay bricks In this particular component High alumina brick refractories can have two bond programs, ceramic, and phosphate. Phosphate brick is quickly recognized by a phosphorus pentoxide (P2O5) material on their facts sheet of between about 3% and 6%. https://deaneffda.bcbloggers.com/38487862/the-smart-trick-of-ceramic-crucible-that-nobody-is-discussing