期刊
CERAMICS INTERNATIONAL
卷 44, 期 2, 页码 1356-1361出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.08.195
关键词
Solid solution; Crystal structure; Lattice parameters; Theoretical density; Linear expansion coefficient
资金
- Natural Science Foundation of Hubei China [2015CFB517]
- State Key Laboratory of Refractories and Metallurgy [2014QN08]
To enable the comprehensive application of Al2O3-Cr2O3 solid solutions, the crystal structures and properties of Al2O3-Cr2O3 solid solutions with different Cr2O3 contents were studied. It was observed that Al2O3 and Cr2O3 form a complete substitutional solid solution over the entire composition range at 1650 degrees C, with no compounds being formed. Lattice parameters a and c both increase linearly with an increase in the Cr2O3 content. The doping of the Cr3+ ions causes a more severe lattice strain in the c-axis direction. The diffraction angles of the diffraction peaks decrease in a linear manner with the increase in the Cr2O3 content. The relationship between the theoretical density of the solid solution and the Cr2O3 content could be fitted using a second-order polynomial. It was also observed that the linear expansion coefficient of the solid solutions decreases with an increase in the Cr2O3 content.
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