| 摘要 |
<p>An improved blast furnace slag made by the incorporation of raw materials with higher than conventional magnesia content, preferably with added fluxing and nucleating oxides, so as to produce a molten slag from which can be cast and annealed items of a glass ceramic nature. Preferably, the composition of the blast furnace slag is: SiO2 (30-80%); MgO (10-45%); CaO (10-30%); Al2O3 (5-30%). The fluxing oxides may be Li, Na, K, B or Pb (0.5 - 10%) and the nucleating oxides may be Al, Ba, Sn, Ti, V, Cr, Mn, Fe, Zn or Zr (0.5 - 10%).</p> |
