Synthesis and morpho-structural characterization of NaTaO3 nanomaterials obtained by ultrasonic method with immersed sonotrode
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- 作者：P. Sfirloaga ; M. Poienar ; C. Ianasi…
- 关键词：NaTaO3 materials ; Ultrasonic method ; Thermal analysis ; Perovskite structure
- 刊名：Journal of Thermal Analysis and Calorimetry
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：127
- 期：1
- 页码：457-462
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Physical Chemistry; Analytical Chemistry; Polymer Sciences; Inorganic Chemistry; Measurement Science and Instrumentation;
- 出版者：Springer Netherlands
- ISSN：1588-2926
- 卷排序：127
文摘
A fast and effective method for the preparation of NaTaO3 nanomaterials reported here is ultrasonic method with immersed sonotrode in the reaction medium followed by annealing at 600 °C. In order to remove the organic material and increase phase crystallinity, the materials were annealed at different temperatures (400, 600, 800 °C), for 6 h. The as-prepared samples were characterized by X-ray diffraction (XRD), thermal analysis (TG/DTG/HF), IR spectroscopy, surface area analysis (BET), and scanning electron microscopy (SEM/EDX). The structural characterization by X-ray powder diffraction revealed that heat-treated materials at 600 °C are well crystallized and the average size of the crystallites being approximately 60 nm, confirmed also by scanning electron microscopy. Thermal analysis has revealed five transformations process of NaTaO3, the highest mass loss (10.67 %) taking place in the range 23–323.5 °C. It was found that the BET surface area decreases with temperature increasing which indicates a change in pores due to the removal of organics. From morphological analysis, it can be seen that particles have spherical shape and EDX revealed the purity of obtained materials.