The invention relates to a
fluorine-free environmental opaque
glass material and a preparation method thereof and belongs to the new material field of glass. Composition of the
glass material is SiO2-Al2O3-B2O3P2O5-MgO-CaO-SrO-BaO-Li2O-Na2O-K2O. The preparation method comprises that raw materials are mixed to make an even batch, then the batch is put into a
corundum crucible, and then the batch is casted and molded after being melted and insulated under 1500 DEG C to 1520 DEG C for 3 hours, and then the batch is insulated and annealed under 550 DEG C to 560 DEG C for 1 hour. The preparation of the invention replaces the
fluoride with a small amount of
phosphate to generate opaque effect, and no environmental
pollution can be caused in the industrial production of the opaque glass, and the short service life of glass furnaces and safety problems caused by
fluorine can be avoided, and a compact net structure reconstruction technology is adopted to adjust the relative contents of SiO2 and P2O5, meanwhile, alkali metals or
alkaline earth metal oxides are introduced, and the glass produces significant opaque effect under the spontaneous phase separation in the process of cooling, and a small amount of B2O3 is introduced to enhance the opaque effect of the glass, meanwhile, a certain amount of Al2O3 is introduced to endow the glass with excellent
chemical stability.