CERAMIC MATERIAL AND PREPARATION METHOD THEREOF Russian patent published in 2010 - IPC C04B35/565 

FIELD: chemistry.

SUBSTANCE: invention relates to production of ceramic articles working at high temperatures in aggressive and abrasive media, as well as under impact-dynamic conditions. The ceramic material contains the following in wt %: MgO - 0.7-1.4, Y₂O₃- 4.1-8.2, Al₂O₃ - 5.2-10.4, α-SiC - the rest. The oxides are in a strict eutectic ratio in accordance with the ternary diagram of Al₂O₃-Y₂O₃-MgO on the garnet-spinel section, which defines the melting point of the oxide phase which is equal to 1770°C±5°C. The method of preparing ceramic material involves preparation of a homogeneous mixture from micropowder of α-silicon carbide, magnesium, yttrium and aluminium oxides with addition of α binder, moulding a workpiece, drying and sintering at 1840-1880°C, preferably at 1860°C and maintaining said temperature for 60±5 minutes.

EFFECT: preparation of material with high hardness, strength and low porosity with low power consumption and possibility of widening the range of articles made.

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