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本文采用粉煤灰为主要原料,在较低的烧成温度下研制了性能优良的粉煤灰陶瓷墙地砖。着重研究了粉煤灰陶瓷的显微结构,分析了瓷体在烧成过程中的物理化学变化,探讨了粉煤灰陶瓷的低温烧成机制。进行x射线衍射和扫描电子显微镜研究,结果表明:粉煤灰陶瓷的显微结构是以粉煤灰原料中的非晶态玻珠和少量的结晶矿物石英及莫来石为骨架,烧成时产生的大量液相致密地填充骨架而构成的。粉煤灰陶瓷的烧结属于液相烧结,这种烧成机制决定粉煤灰陶瓷可以在低温下烧成。
In this paper, fly ash was used as the main raw material, and fly ash ceramic tiles with excellent performance were developed at lower firing temperatures. The microstructure of fly ash ceramics was studied emphatically, the physical and chemical changes of the porcelain body during the firing process were analyzed, and the low-temperature firing mechanism of fly ash ceramics was discussed. X-ray diffraction and scanning electron microscopy studies have shown that the microstructure of fly ash ceramics is based on the amorphous glass beads in fly ash raw materials and a small amount of crystalline mineral quartz and mullite as the skeleton, when firing The resulting large amount of liquid phase is densely filled with the skeleton. The sintering of fly ash ceramics is liquid phase sintering. This firing mechanism determines that fly ash ceramics can be fired at low temperatures.