If you are willing to wholesale quality,Website: , advanced and durable high purity β〞alumina from one of the famous China alpha alumina manufacturers, CHALCO is always at your service. β "alumina has a layered spinel structure of sodium atoms present in the discrete layer between aluminum atoms and oxygen atoms. Because of it low resistance value, β " alumina is particularly used as ion conductor in chemical battery . Al2O3 Na2O Fe Si Ca MgO β〞content particle size 85-87% 8-9% ＜10ppm ＜30ppm ＜10ppm 2.5-2.8 ＞95% 1-1.2 um