期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 356, 期 28-30, 页码 1530-1532出版社
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2010.04.026
关键词
Nano-SrCO3; Thermogravimetry; Differential thermal analysis; High-temperature XRD
Nanocrystalline strontianite (nano-SrCO3) was synthesized by a simple co-precipitation method. The crystal phase and grain size analyses were performed by X-ray diffraction (XRD) and transmission electron microscope (TEM). The thermal properties of nano-strontianite and reference strontianite were investigated using the thermogravimetry (TG), differential thermal analysis (DTA), and high-temperature XRD. The results of TG and DTA revealed that the phase transition and decomposition temperatures of nano-SrCO3 were lower than those of the reference SrCO3. It was also observed that the high-temperature XRD result was in accordance with the TG/DTA measurement. This phenomenon was mainly attributed to the high surface energy of nanomaterials, in which a large number of dangling bonds were present. Consequently, a lower temperature (energy) was sufficient for the phase transition or decomposition of nano-SrCO3. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
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