Abstract

An effective method of obtaining dense granular ceramics from SiC with a residual porosity of less than 5,0 % is the use of additives of eutectic compositions of oxide systems. The effect of the dispersed eutectic powder in the Al2O3‒MnO‒ SiO2 system depending on the composition of the charge, the pressing pressure and the burning temperature on the sintering performance of granular SiC ceramics is considered. It is established that after roasting at 1250 °C of such ceramics with 15 wt. % of the eutectic additive, its porosity is 4,2 %, and the flexural strength reaches (95±5) MPa. Ill. 2. Ref. 7. Tab. 2.

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