... properties 4,mainly for high-temperature High-purity magnesium oxide sandare electrically fused synthesized using high purity ZrO2,MgO,Cr2O3,TiO2, ... Al2O3 and Y2O3as starting materials,with high CaO,MgO or ... with fiber abrasion and used in field of textureWith high wear and corrosion resistant, and lowfractioncoefficientUsed in Instruments ...