zirconia fused alumina is produced in a high temperature electrical arc furnace by fusing zirconium quartz sand. zirconia fused alumina is characterized by hard and dense structure,high toughness and good thermal-stability. zirconia fused alumina is suitable for heavy grinding and making high grade refractory materials etc. zirconia fused alumina: chemical composition(%) za40 : al2o3: 50-60% zro2:38-44% sio2 :0.5%max tio2:1.0%max fe2o3:0.2%max za25: al2o3: 68-72% zro2:24-30% sio2 :0.5%max tio2:1.0%max fe2o3:0.2%max we have strict control about company & quality;our service is full-around and first-class. so we¡¯re you wise choice.don¡¯t hesitate to contact us. contact person: ms. liang xiaofei(sales manager) helen(at)rs-abrasive.com tel:+86 379 65285888-0 13015581246 fax:+86 379 66285889