... STANDARD VALUE Appearance White Powder P2O5 , % 42.5~46.5 Al2O3 , % 11.0~15.0 SiO2 , % 13.5~17.0 ZnO , % 15.0~18 ... Particle Size, micron ≤10.0 45 micron sieve residue, % ≤0.5 ( function(){ var aBigImageSrc = [ 'http://i00.i.aliimg.com/photo/v2 ...