Synthesis and Characterization of Sr 2 [Sr n−1 Ti n O 3n+1 ] Series by Mechanochemical Activation
Synthesis and Characterization of Sr 2 [Sr n−1 Ti n O 3n+1 ] Series by Mechanochemical Activation
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机械化学活化Sr 2 [Sr n−1 Ti n O 3n+1 ]系列的合成与表征
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Castro
中科院分区：
文献类型：
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作者：
T. Hungría;J. Lisoni;A. Moure;L. Pardo;A. Castro
采用一种新的高能球磨法合成了n=1 ~ 3的Sr 2 [Srnm 1 TinO 3 n +1 ] Ruddlesden-Popper系列化合物，与传统的陶瓷法相比，反应温度和时间大大降低。在球磨过程中观察到SrTiO 3的机械合成。类似的结果得到了振动和天文研磨系统，虽然所涉及的时间尺度较短时，最后一个被使用。将研磨的样品在不同温度下退火，直到在一个单一步骤中形成层状钙钛矿。通过热分析、红外吸收光谱和X射线衍射对最终产物和球磨粉末进行了研究。研究了Sr 2 TiO 4和Sr 3 Ti 2 O 7陶瓷样品的显微结构.
A new synthesis method, based on high-energy milling, has been applied to obtain the n=1 to 3 members of Sr 2 [Sr n m 1 Ti n O 3n+1 ] Ruddlesden-Popper series, producing a very important decrease in the temperature and time reactions as compared with the traditional ceramic method. The mechanosynthesis of SrTiO 3 was observed during ball milling processes. Similar results were obtained with vibrating and planetarium milling systems, although the time scales involved are shorter when last one was used. The milled samples were annealed at different temperatures up to the formation of the layered perovskites in one single step. Final products as well as milled powders were studied by thermal analysis, infrared absorption spectroscopy and X-ray diffraction. The microstructure of ceramic samples with Sr 2 TiO 4 and Sr 3 Ti 2 O 7 compositions was investigated.