Changes in the heat capacity of Al2O3-Cr2O3 solid solutions near the point of antiferromagnetic phase transition in Cr2O3 |
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| Authors: | V. A. Drebushchak A. I. Turkin |
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| Affiliation: | 1.Institute of Geology and Mineralogy,Siberian Branch of the Russian Academy of Sciences,Novosibirsk,Russia;2.Research and Education Center ‘Molecular Design and Ecologically Safe Technologies’, REC-008,Novosibirsk State University,Novosibirsk,Russia |
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| Abstract: | Al2O3-Cr2O3 solid solutions with 0, 4, 7, 10 and 20 mol% of corundum were synthesized using a high-pressure/high-temperature apparatus and characterized by X-ray powder diffraction. Calorimetric measurements were carried out using DSC-111 (Setaram). Heat capacity was measured by the enthalpy method in a temperature range of 260–340 K, near magnetic phase transition in pure Cr2O3 (305 K). Magnetic contribution into the heat capacity was derived and found to change irregularly with the composition. |
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