Behavior of a Heat-Protective Material Based on Al2O3 and SiO2 Fibers under Exposure to Concentrated Solar Energy Flux

Сулейманов, С. Х.; Бабашов, В. Г.; Dzhanklich, M. U.; Dyskin, V. G.; Daskovskii, M. I.; Skripachev, S. Yu.; Кулагина, Н. А.; Arushanov, G. M.

doi:10.1007/s11148-021-00541-4

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“…High-temperature treatment of ceramic materials was carried out using a unique facility-the Big Solar Furnace located in the Republic of Uzbekistan (Parkent city), which was put into operation in 1987 [13][14][15] (Figure 2). The samples of 3 materials were installed in a fixture and exposed to 1-sided heating by means of concentrated solar radiation with a flux density of 730-925 W/m 2 (Figure 3).…”

Section: Methodsmentioning

confidence: 99%

“…The temperature difference between the upper and the lower parts of the samples reached 290 • C. The experiment was carried out in the 2 modes: the first mode includes heating up to 1400-1600 • C, holding for 1.5-2 h; the second mode (the fusion mode) includes heating up to 1750-1900 • C until the sample destruction, which is accompanied by fusion. High-temperature treatment of ceramic materials was carried out using a unique facility-the Big Solar Furnace located in the Republic of Uzbekistan (Parkent city), which was put into operation in 1987 [13][14][15] (Figure 2). The samples of 3 materials were installed in a fixture and exposed to 1-sided heating by means of concentrated solar radiation with a flux density of 730-925 W/m 2 (Figure 3).…”

Section: Methodsmentioning

confidence: 99%

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Structure and Properties of Highly Porous Alumina-Based Ceramic Materials after Heating by Concentrated Solar Radiation

et al. 2021

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Three ceramic fibrous materials of the Al2O3-SiO2 system with different densities have been treated using concentrated solar radiation. The experiment was performed using technological capabilities of the Big Solar Furnace in the 2 modes: the first mode includes heating up to 1400–1600 °C, holding for 1.5–2 h; the second mode (the fusion mode) includes heating up to 1750–1900 °C until the sample destruction, which is accompanied by fusion. Upon completion of the experiment, the phase composition, microstructure, and compressive strength of the materials were studied. It was shown that the investigated materials retained their fibrous structure under prolonged treatment in the first mode up to temperatures of 1600 °C. The phase composition of the ceramic materials changes during the experiment, and with a decrease in the density, the modification is more pronounced. Treatment of all three materials under study in the fusion mode resulted in the formation of the eutectic component in the form of spherulites. The compressive strength of the materials was found to be slightly reduced after exposure to concentrated solar radiation.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%