Abstract The effect of the flux density of concentrated solar radiation (CSR) on the properties of material with a piroxene structure fused in a Large Solar Furnace (LSF) is studied. It is revealed that the density and shape of the distribution of the CSR flow over the diameter of the focal zone of the LSF have a strong effect on the homogeneity of the melt. Exposure of the melt to high-density CSR contributes to the formation of a homogeneous and uniform state of the melt. Cooling the melt by pouring it into water (quenching) helps to fix the amorphous state of the material. Observing the appropriate firing modes from fused material, glass, it is possible to obtain a glass-crystalline material with a pyroxene structure of diopside-hedenbergite composition Ca(MgFe2+)Si2O6 with high wear resistance. A mechanism of interaction of CSR with the material, which is based on zone structure, is suggested. According to this mechanism, heating of the material upon irradiation by the CSR is based on photoabsorption, which increases the density of states in the “tails” of energy zones, which results in the fusion of the material.
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