用矾土制备莫来石-高硅氧玻璃材料的研究

Study on mullite-silica-rich glass material made from bauxite

用Al2O3含量在57％～62％的矾土制备了一种由莫来石与高硅氧玻璃所构成的材料。在高温下，玻璃转变为高粘度的液相对高温性能有利；低温下，由于高硅氧玻璃的热膨胀系数低，莫来石形成交叉网络结构，有利于提高热震稳定性。这是一种有广泛前途的耐火原料，也为我国二级矾土的开发利用开辟了新途径。

A mullite material with silica-rich glass made from bauxite with 57% ~62% Al2O3 has been developed.Its glassphase transformsing into liquid phase with high viscosity at high tempcrature is favourable to the high temperatureproperties, At low temperature, the mullite forms network structure because of the low thermal cxpansion coelficient ofthe silica - rich glass. This helps improve the thermal shock resistance.The matcrial has extensive application and opensup a new way to utilize the second -grade bauxite in China.