Abstract
The formation of (Ln3+)2(M4+)2O7 (Ln = Gd, Dy; M = Zr, Hf) nanocrystallites obtained by annealing mixed hydroxides LnM(OH)7 · nH2O (precursors) synthesized by coprecipitation has been studied by synchronous thermal analysis, X-ray diffraction (normal and anomalous diffraction of synchrotron radiation), and EXAFS. In the systems under consideration, heat treatment of the X-ray amorphous precursors leads to their dehydration, and at 600–700°C, nanocrystallites with an fcc structure of disordered fluorite start forming. A further increase in temperature is accompanied by crystallite growth (CDD) and considerable change in the local structure of the heat-treated compounds. The crystallization enthalpies and activation energies have been determined.
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Q. Xu, W. Pan, J. Wang, et al., J. Am. Ceram. Soc. 89(1), 340 (2006).
D. P. Cann, C. A. Randall, and T. R. Shrout, Solid State Commun. 100(7), 529 (1996).
J. Lian, L. M. Wang, S. X. Wang, et al., Phys. Rev. Lett. 87(14), 14509–1 (2001).
A. V. Shlyakhtina, A. V. Mosunov, S. Yu. Stefanovich, et al., Inorg. Mater. 40(12), 1312 (2004).
A. V. Shlyakhtina, I. V. Kolbanev, A. V. Knot’ko, et al., Inorg. Mater. 41 (8), 654 (2005).
A. V. Shlyakhtina, M. V. Boguslavskii, S. Yu. Stefanovich, et al., Inorg. Mater. 42(5), 519 (2006).
V. D. Risovany, E. E. Varlashova, and D. N. Suslov, J. Nucl. Mater. 281(1), 84 (2000).
V. D. Risovany, A. V. Zakharov, E. M. Muraleva, et al., J. Nucl. Mater. 355(1), 163 (2006).
Y. Ji, D. Jiang, and J. Shia, J. Mater. Res. 20(3), 567 (2005).
S. V. Yudintsev, In: An International Spent Nuclear Fuel Storage Facility, Ed. by G. E. Schweitzer and A. C. Sharber (National Academic Press, Washington, DC, 2005), p. 208.
K. E. Sickafus, L. Minervini, R. W. Grimes, et al., Science 289(5480), 748 (2000).
M. A. Subramanian, G. Aravamudan, and Rao G. V. Subba, Prog. Solid State Chem. 15(3), 55 (1983).
C. R. Stanek, “Atomic Scale Disorder in Fluorite and Fluorite Related Oxides,” PhD Thesis (Imperial college of London, London, 2003).
S. V. Ushakov and A. Navrotsky, J. Am. Ceram. Soc. 90(4), 1171 (2007).
M. J. D. Rushton, R. W. Grimes, C. R. Stanek, et al., J. Mater. Res. 19(6), 1603 (2004).
V. F. Petrunin, NanoStruct. Mater. 12(8), 1153 (1999).
N. A. Shabanova, V. V. Popov, and P. D. Sarkisov, Chemistry and Technology of Nanodispersed Oxides (Akademkniga, Moscow, 2006) [in Russian].
V. F. Petrunin, V. V. Popov, A. V. Fedotov, et al., Proceedings of All-Russia Conference “hysical Chemistry of Ultradispersed (Nano) Systems (MIFI, Moscow, 2006), p. 98.
S. S. Gorelik, Yu. A. Skakov, and L. N. Rastorguev, X-ray Diffraction and Electrooptical Analysis (MISIS, Moscow, 2002) [in Russian].
A. A. Chernyshov, A. A. Veligzhanin, and Y. V. Zubavichus, Nucl. Instr. Meth. Phys. Res. A 603, 95 (2009).
K. V. Klementiev, J. Phys. D: Appl. Phys. 34(2), 209 (2001).
M. Newville, J. Synchrotron Rad. 8(2), 322 (2001).
A. L. Ankudinov, B. Ravel, J. J. Rehr, et al., Phys. Rev. B 58, 7565. (1998).
Y. Waseda, Anomalous X-ray Scattering for Materials Characterization. Atomic-Scale Structure Determination (Springer, Berlin, 2002).
L. Minervini, R. W. Grimes, and K. E. Sickafus, J. Am. Ceram. Soc. 83(8), 1873 (2000).
A. I. Frenkel, A. V. Kolobov, I. K. Robinson, et al., Phys. Rev. Lett. 89(28), 285503 (2002).
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Original Russian Text © V.V. Popov, V.F. Petrunin, S.A. Korovin, A.P. Menushenkov, O.V. Kashurnikova, R.V. Chernikov, A.A. Yaroslavtsev, Ya.V. Zubavichus, 2011, published in Zhurnal Neorganicheskoi Khimii, 2011, Vol. 56, No. 10, pp. 1617–1623.
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Popov, V.V., Petrunin, V.F., Korovin, S.A. et al. Formation of nanocrystalline structures in the Ln2O3-MO2 systems (Ln = Gd, Dy; M = Zr, Hf). Russ. J. Inorg. Chem. 56, 1538–1544 (2011). https://doi.org/10.1134/S0036023611100184
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DOI: https://doi.org/10.1134/S0036023611100184