Abstract
The formation of solid solutions of α-Fe2O3 and Al2O3 at temperatures ranging from 80 to 950 °C is studied by Mössbauer spectroscopy, DTA, and specific surface area measurements. In the Mössbauer spectrum, a doublet is observed up to about 330°C. At higher temperatures, a transition to a six-line spectrum is observed. The temperature of this transition increases with increasing Al2O3 content which is indicative of the retardation of the crystallization process. This is confirmed by DTA data. The solubility limit of Al2O3 in α-Fe2O3 as determined by measurements of the effective internal magnetic field values is ≈ 10 mol1% Al2O3. [Russian Text Ignored].
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