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Crystallization behavior of amorphous solid solutions and phase sepration in the Cr2O3-Fe2O3 system

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Abstract

Fine particles of the amorphous Cr2O3-Fe2O2 solid solutions were prepared by dehydration of coprecipitated hydroxides and their crystallization behavior was studied by differential thermal analysis and X-ray diffraction. The peak temperature for crystallization attained a maximum at a composition near Fe2O3 content of about 60 mol % and the activation energy for crystallization attained a minimum at a composition near Fe2O3 content of about 50 mol % in this quasibinary system. Phase separation occurred in a range of Fe2O3 content from about 35 to 80 mol % in the corundum-type solid solutions heat treated at 600 °C for 2 h. Crystallization behavior was discussed briefly related with phase separation and diffusion in fine particles.

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Authors and Affiliations

  1. Advanced Technology Research Center,, Mitsubishi Heavy Industries, Ltd., Sachiura, 1-8-1, Kanazawa-ku,, Yokohama, 236-8515,, Japan

    Y. Murakami, A. Sawata & Y. Tsuru

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  1. Y. Murakami
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  2. A. Sawata
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  3. Y. Tsuru
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Murakami, Y., Sawata, A. & Tsuru, Y. Crystallization behavior of amorphous solid solutions and phase sepration in the Cr2O3-Fe2O3 system. Journal of Materials Science 34, 951–955 (1999). https://doi.org/10.1023/A:1004575423933

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