Production of refractory blocks in induction-heated fusion-crystallization devices

Autor: V. V. Nezhentsev, Yu. A. Polonskii, I. V. Shurygina, Yu. B. Petrov, V. M. Ganyuchenko
Rok vydání: 1976
Předmět:
Zdroj: Refractories. 17:302-304
ISSN: 1573-9139
0034-3102
DOI: 10.1007/bf01281619
Popis: The feasibility was demonstrated experimentally with compositions of the system ZrO2 — Al2O3 — SiO2 as examples that fused blocks of refractory materials can be produced without the casting operation in an induction-heated fusion-crystallization device. The fusion process is characterized by the almost complete absence of melt contamination and by an adequate agreement of the chemical compositions of the blocks and the starting mix. The porosity of baddeleyite — corundum blocks produced by this method was low. The structure of the blocks varies with the composition of the starting material and is characterized by the presence of baddeleyite and corundum crystals and a vitreous phase. The blocks are fissured as a result of the high rate of cooling. Fissuring can be reduced or prevented by heat-treating the blocks in an annealing device immediately after crystallizing.
Databáze: OpenAIRE
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