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Molten salt synthesis of SrTiO₃ nanocrystals using nanocrystalline TiO₂ as a precursor

Author:
Wang, Tian Xi, Liu, Shuang Zhi, Chen, Jun
Source:
Powder technology 2011 v.205 no.1-3 pp. 289-291
ISSN:
0032-5910
Subject:
X-ray diffraction, X-ray photoelectron spectroscopy, nanocrystals, powders, raw materials, strontium, titanium dioxide, transmission electron microscopy
Abstract:
A molten salt method was proposed to synthesize SrTiO₃ nanocrystals in the eutectic NaCl–KCl at 700°C for 6h, by using the homemade TiO₂ nanocrystals and commercial Sr(NO₃)₂ powder as raw materials. Besides, a control experiment with the commercial TiO₂ submicron-sized crystallites as a precursor was also conducted. The structure and composition of the obtained products were characterized by powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The results from XRD and XPS revealed the preparation of pure cubic phase SrTiO₃ powders. The TEM observation demonstrated that the nanocrystalline TiO₂ precursor played an important role in the current molten salt synthesis of SrTiO₃ nanocrystals, which were likely formed by the template formation mechanism.
Agid:
1059235