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.
Similar content being viewed by others
References
P. Schmuki, S. Virtanen, H. S. Isaacs, M. P. Ryan, A. J. Davenport, H. B ¨ohni and T. Stenberg, J. Electrochem. Soc. 145 (1998) 791.
E. Curry-Hyde and A. Baiker, Ind. Eng. Chem. Res. 29 (1990) 1985.
S. Music, S. Popovic and M. Ristic, J. Mater. Sci. 28 (1993) 632.
S. Music, M. Lenglet, S. Popovic, B. Hannoyer, I. C. Nagy, M. Ristic, D. Balzar and F. Gashi, ibid. 31 (1996) 4067.
P. Tsokov, V. Blaskov, D. Klissurski and I. Tsolovski, ibid. 28 (1993) 184.
A. K. Bhattacharta, A. HARTRIDGE, K. K. MALLICK, C. K. MAJUMUDAR, D. DAS and S. N. CHINTALAPUDI, ibid. 32 (1997) 557.
K. MATUSITA and S. SAKKA, J. Non-Cryst. Solids 38 (1980) 741.
Y. Murakami and H. Yamamoto, J. Ceram. Soc. Jpn. 101 (1993) 1101.
A. D. Polli, F. F. Lange and G. G. Levi, J. Amer. Ceram. Soc. 79 (1996) 1745.
W. C. Hagel and A. U. Seybolt, J. Electrochem. Soc. 108 (1961) 70.
W. C. Hagel, J. Amer. Ceram. Soc. 48 (1965) 70.
V. I. Izvekov, N. S. Gorbunov and A. A. Babadzakhryapin, Fiz. Metal. Metalloved. 14 (1962) 195.
W. D. Kingery, D. C. Hill and R. P. Nelson, J. Amer. Ceram. Soc. 49 (1966) 244.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
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
Issue Date:
DOI: https://doi.org/10.1023/A:1004575423933