Abstract
Powder x-ray diffraction data of yttria (Y2O3) were obtained from room temperature to melting point with the thin wire resistance heating technique. A solid-state phase transition was observed at 2512 ± 25 K and melting of the high-uemperature phase at 2705 ± 25 K. Thermal expansion data for α–Y2O3 (C-type) are given for the range 298–2540 K. The unit cell parameter increases nonlinearly, especially just before the solid-state transition. The x-ray diffraction spectrum of the high-temperature phase is consistent with the fluorite-type structure (space group Fm3) with a refined unit cell parameter a = 5.3903(6) Å at 2530 K. The sample recrystallized rapidly above 2540 K, and above 2730 K, all the diffraction lines and spots disappeared from the x-ray diffraction spectrum that suggests complete melting.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. M. Lejus and R. Collongues, in Current Topics in Material Science, edited by E. Kaldis (North-Holland Publishing Company, Amsterdam, 1980), Vol. 4, p. 481.
W.H. Rhodes, in Phase Diagrams in Advanced Ceramics, edited by A.M. Alper (Academic Press, San Diego, CA, 1995), p. 1.
M. Foex, High Temp.-High Press. 9, 269 (1977).
F. Cabannes, V. T. Loc, J-P. Coutures, and M. Foex, High Temp.-High Press. 8, 391 (1976).
S.R. Skaggs, High Temp. Sci. 9, 197 (1977).
D. Taylor, Brit. Ceram. Trans. J. 83, 92 (1984).
M. Foex and J-P. Traverse, Rev. Int. Hautes Temp. Refract. 3, 429 (1966).
H.R. Hoekstra and K. A. Gingerich, Science 146, 1163 (1964).
S. Katagiri, N. Ishizawa, and F. Marumo, Powder Diffraction 8, 60 (1993).
T. Yamada, M. Yoshimura, and S. Sōmiya, High Temp.-High Press. 18, 377 (1986).
P.F. McMillan, B. T. Poe, Ph. Gillet, and B. Reynard, Geochim. Cosmochim. Acta 58, 3653 (1994).
L.S. Dubrovinsky and S. K. Saxena, Phys. Chem. Minerals 24, 547 (1997).
O. N. Carlson, Bull. Alloy Phase Diagrams 11, 61 (1990).
E.E. Shpil’rain, D. N. Kagan, L. S. Barkhatov, L. I. Zhmakin, and V. V. Koroleva, High Temp.-High Press. 11, 539 (1979).
L.M. Lopato, A. V. Shevchenko, A. E. Kushchevskii, and S. G. Tresvyatskii, Neorgan. Mater. 10, 1481 (1974).
E. E. Shpil’rain, D. N. Kagan, L. S. Barkhatov, and V. V. Koroleva, High Temp.-High Press. 8, 183 (1976).
M. Mizuno, T. Yamada, S. Kawakami, and E. Ishii, Yogyo-Kyokai-Shi 93, 404 (1985).
G. T. Adylov, G. V. Voronov, E. P. Mansurova, L. M. Sigalov, and E. M. Urazaeva, Russ. J. Inorg. Chem. 33, 1062 (1988).
E. R. Andrievskaya, Z. A. Zaitseva, A. V. Shevchenko, and L. M. Lopato, Neorgan. Mater. 33, 465 (1997).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Swamy, V., Dubrovinskaya, N.A. & Dubrovinsky, L.S. High-temperature powder x-ray diffraction of yttria to melting point. Journal of Materials Research 14, 456–459 (1999). https://doi.org/10.1557/JMR.1999.0065
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.1999.0065