Cement Industry: Utilized in kilns and preheaters in which high temperatures and chemical corrosion are common. High alumina brick refractories can have two bond programs, ceramic, and phosphate. Phosphate brick is readily acknowledged by a phosphorus pentoxide (P2O5) information on their own data sheet of among about 3% and six%. https://nano-silicon-powder03691.sasugawiki.com/7669343/helping_the_others_realize_the_advantages_of_alumina_firebrick