期刊
JOURNAL OF CRYSTAL GROWTH
卷 467, 期 -, 页码 88-92出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2017.03.022
关键词
Crystal structure; Nanostructures; Nucleation; X-ray diffraction; Oxides; Perovskites
资金
- Russian Science Foundation [16-13-10252]
- Russian Science Foundation [16-13-10252] Funding Source: Russian Science Foundation
Nanocrystalline perovskite NdFeO3 with the orthorhombic structure was prepared by a glycine nitrate combustion method under different technological conditions. The starting materials Fe(NO3)(3)center dot 9H(2)O; Nd(NO3)(3) center dot 6H(2)O in stoichiometric amounts and H2NCH2COOH were used. These quantities were varied by changing the ratio of glycine moles to metal nitrate moles (G/N) in the range between 0.25 and 0.75. The prepared NdFeO3 nanocrystals were characterised by X-ray diffraction (XRD) and electron microscopy. Decomposition of the XRD diffraction profile using Voigt contours was exploited for analysis of the pattern in the area where the most prominent diffraction peak was situated. We demonstrate that Voigt functions reduce to Lorentzians for G= N = 0: 75 and 0: 55. A volume-weighted diameter distribution function was derived using the width of the Lorentzians. The log-normal shape of the distribution is discussed in terms of the model, assuming exponential growth of cluster size in the time available for the NdFeO3 nanograin to grow. (C) 2017 Elsevier B.V. All rights reserved.
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