Abstract
Sintering and mullitization are studied for specimens prepared on the basis of compound composition HCBS in the system bauxite – very fine quartz glass (VFQG), and also with addition of refractory clay. The nature of sintering and mullitization is governed to a considerable extent by SiO2 content in the original composition (VFQG + clay). Dilatometric studies of specimens previously fired at 1600°C established that depending on composition thermal expansion values in the range 20 – 1000°C are within the limits of 0.5 – 0.6%, which is close or comparable with similar data for pure mullite.
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