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Low-cost mullite ceramics were prepared from the mixtures of natural bauxite and industrial waste fly ash. The fired samples, including fly ash, bauxite and their mixture based on the composition of 3:2 mullite, were characterized respectively by XRD (X-ray diffraction). The results indicate that the secondary mullitization occurred by the solid-state reaction of cristobalite and corundum below 1300°C,...
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