white fused alumina/WFA for polishing crystal

White fused alumina/WFA for polishing crystal:White Fused Alumina was made from the high quality alumina by melting above 2000 in the electric arc furnace and cooling. It is white with the main crystal phase alpha-Al2O3.The white alumina produced in titling electric arc furnace has the advantage of high bulk density and low porosity and the volume stability and thermal shock resistance can be improved.Item Indicators color Pure white Crystal Trigonal system Hardness ≥9.0 melting point 2250 The maximum temperature 1900 True Densityg/cm3 ≥3. 90 Linear expansion coefficient (01600 79