| 摘要 |
<p>A glass composition for producing proppants comprising by weight percent, oxides of (a) from 45 to 52% SiO 2, (b) from 28 to 34% MgO, (c) from 7 to 10% Al2O3, (d) from 1.6 to 4.5% FeO, (e)from 5 to 8% CaO, (f)from 0.3 to 0.6% Na2O, (g) from 0.3 to 1,5% K2O, (h) from 0.1 to 0.3% P2O5, (i) from 0.1 to 0.8% Cr2O3, (j) from 0.3 to 0.7% TiO2, (k) from 1.0 to 3.2% F, and (h) from 0.1 to 3.6% MnO. A method for making glass proppants comprising heating a glass composition comprising the foregoing ratio of oxides.</p> |
