Abstract
Phase transformations in synthetic hexacelsian were investigated by hot-stage transmission electron microscopy. A second phase transformation from an orthorhombic to hexagonal structure was identified in the synthetic hexacelsian at approximately 700 °C. The hexacelsian was found to exhibit a sequence of phase transformations on heating of hexagonal (P63/mcm)–orthorhombic (Immm)–hexagonal (P6/mmm). Antiphase domain boundaries, which were observed in P63/mcm and Immm phases, were absent in the P6/mmm phase. Crystal symmetries of the three phases were determined by convergent beam electron diffraction, and space group symmetries were derived by comparison of experimental selected area electron diffraction patterns with computer-simulated patterns.
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References
J.L. Shull, A Investigation of Several “Transformation Weakeners” for Ceramic Composite Interphases, Ph.D. Thesis, W.M. Kriven, advisor, The University of Illinois at Urbana-Champaign (1997).
W.M. Kriven, J. Phys. Colloq. 5(C8), C8-101–110 (1995).
R.E. Newnham and H.D. Megaw, Acta Crystallogr. 13, 303 (1960).
V.V. Bakakin and N.V. Belov, Soviet. Phys. Crystallogr. 5, 826 (1961).
H.C. Lin and W.R. Forster, Am. Mineral. 53, 134 (1968).
C.E. Semler, A. Lin, and W.R. Forster, J. Am. Ceram. Soc. 52, 679 (1969).
C.E. Semler and W.R. Forster, J. Am. Ceram. Soc. 53, 549 (1970).
T. Ito, X-ray Studies on Polymorphism (Maruzen: Tokyo, Japan, 1950).
Y. Take´uchi, Mineral. J. (Sapporo) 2, 311 (1958).
B. Yoshiki and K. Matsumoto, J. Am. Ceram. Soc. 34, 283 (1951).
W.F. Mu¨ller, in Electron Microscopy in Mineralogy, edited by H.R. Wenk (Springer-Verlag, Berlin and Heidelberg, Germany, New York, 1976), pp. 354–360.
W.F. Mu¨ller, Phys. Chem. Miner. 1, 71 (1977).
Y. Takéuchi and G. Donnay, Acta Crystallogr. 12, 465 (1959).
J.A. Gard, in Electron Microscopy in Mineralogy,editedby H.R. Wenk (Springer-Verlag, Berlin and Heidelberg, Germany, New York, 1976), p. 52.
H. Ba¨rnighausen, Acta Crystallogr. A 31, Suppl. S3 (1975).
A. Kremenovic, P. Norby, R. Dimitrijevic, and V. Dondur, Solid State Ionics 101, 611 (1997).
A. Kremenovic, P. Norby, R. Dimitrijevic, and V. Dondur, Phase Transitions 68, 587 (1999).
P. Colomban, H. Courret, F. Romain, G. Gouadec, and D. Michel, J. Am. Ceram. Soc. 83, 2974 (2000).
Y. Tabira, R.L. Withers, Y. Take´uchi, and F. Marumo, Phys. Chem. Miner. 27, 194 (2000).
M. Pechini, Method of Preparing Lead and Alkaline-Earth Titanates and Niobates and Coating Method Using the Same to Form a Capacitor, U.S. Patent No. 3330697 (1967).
B.F. Buxton, J.A. Eades, J.W. Steeds, and B.M. Rackham, Philos. Trans. R. Soc. A 281, 171 (1976).
A. Sawada, Y. Makita, and Y. Takagi, J. Phys. Soc. Jpn. 41, 174 (1976).
S. Shiozaki and A. Sawada, J. Phys. Soc. Jpn. 43, 1314 (1977).
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Xu, Z., Shull, J.L. & Kriven, W.M. Hot-stage transmission electron microscopy study of phase transformations in hexacelsian (BaAl2Si2O8). Journal of Materials Research 17, 1287–1297 (2002). https://doi.org/10.1557/JMR.2002.0193
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DOI: https://doi.org/10.1557/JMR.2002.0193