CHARGE AND HIGH-TEMPERATURE MATERIAL OBTAINED OUT OF IT, WITH LOW COEFFICIENT OF LINEAR THERMAL EXPANSION Russian patent published in 2010 - IPC C04B35/478 

FIELD: metallurgy.

SUBSTANCE: charge for obtainment of hogh-temperature material includes aluminium oxide, titanium oxide, sillimanite group mineral and ZrTiO₄ and/or ZrSiO₄ additive stabilising aluminium titanate and increasing mullite output, at the following component ratio, wt %: AI₂O₃ and TiO₂ mix at molar ratio of 1:1 - 47.3-88.5, sillimanite group mineral - 10-50, stabilising ZrTiO₄ and/or ZrSiO₄ additive - 1.5-2.7. High-temperature material with linear thermal expansion coefficient of -0.7÷0.5-10^-7 °C^-1 within 20-1000°C temperature range includes aluminium titanate, mullite, glass phase and ZrTiO₄ and/or ZrSiO₄ phases with low linear thermal expansion coefficient.

EFFECT: enhanced material isotropy, reduced and stabilised linear thermal expansion coefficient.

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