The effect of technological factors (composition, temperature, and holding time) on pore structure, gas permeability, and specific surface of specimens molded from graphite-containing refractory mixtures is studied. Dense refractories based on crucible and muffle mixtures can be prepared at 1100 – 1400°C using a silica sol binder. Heat treatment of the refractories at higher temperatures (about 1600°C) is not recommended because of the sharp increase in open pore size, which may lead to degradation of performance characteristics.
Refractories and Industrial Ceramics – Springer Journals
Published: Nov 18, 2004
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