Because of its high Al₂O�?articles and low impurity amounts, it outperforms fireclay bricks During this element High alumina brick refractories may have two bond units, ceramic, and phosphate. Phosphate brick is instantly acknowledged by a phosphorus pentoxide (P2O5) material on their own information sheet of among about 3% and 6%. https://nano-silicon-powder38258.wikilowdown.com/7460937/indicators_on_alumina_crucible_you_should_know