Zirconia Fused Alumina The Al2O3-ZrO2 System electrically fused material (zirconia-corundum) is a new-type of high purity raw materials manufacturing continuous casting refractory products. The service life of Al2O3-ZrO2-C sliding plate bricks made of this material is greatly increased than the original product (Al2O3-ZrO2-C sliding plate).Its service life used in a steel plant in china is increased by 30%.