Investigations of changes in the phase composition and structure of modern ceramic materials under the action of a high-intensity light flux have been carried out. For the experiment, the technological capabilities of a unique installation - the Large Solar Furnace - were used. It is shown that the surface treatment of the ceramic material of the Al 2 O 3 -SiO 2 system with a highly concentrated energy source leads to the appearance of two new phase components - & # 945 ; -Al 2 O 3 and cristobalite. Reflow material processing contributes to the formation of the eutectic component
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