The paper presents the results of testing a heat-protective material based on Al₂O₃ and SiO₂ fibers under exposure to a concentrated solar energy flux and highly non-uniform thermal and light field conditions. Avariation in the material structure and morphology depending on the heat treatment temperature is shown. The material retains its properties during extended exposure to temperatures of 1,600 – 1,700°C due to the formation of a stable mullite and α-Al₂O₃ structure. Above the mullite melting point (~1,840°C), the material undergoes deformation and melting, and loses its physical, mechanical, and thermal insulation properties.

中文翻译：

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基于Al 2 O 3和SiO 2纤维的隔热材料在集中太阳光通量下的行为

本文介绍了基于Al ₂ O ₃和SiO ₂纤维的隔热材料在暴露于集中的太阳能通量以及高度不均匀的热和光场条件下的测试结果。显示了取决于热处理温度的材料结构和形态的变化。该材料长时间暴露于1600温度期间保留其性能- 1700℃，由于稳定的莫来石和的α-Al的形成₂ Ó ₃结构。高于莫来石熔点（〜1,840°C），材料会发生变形和熔化，并失去其物理，机械和隔热性能。