... . The zinc oxide has the function of fluxing action, which can decress the swell factor of the glaze, increase thermal ... zinc oxideBasic property: Molecular formula:Zno Molecular weight:81.39White or fine slight yellow powder, specific gravity 5.5-6. ... and hydrogen at high temperature. Zinc oxide is an amphoteric-oxide, which is slight soluble or insoluble in water. It generate relevant arsoniumsalt ...