Synthesis of the Aurivillius Phase SrBi4Ti4O15 by a Mechanochemical Activation Route
Synthesis of the Aurivillius Phase SrBi4Ti4O15 by a Mechanochemical Activation Route
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DOI：
10.1021/cm034609l
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发表时间：
2004-03
影响因子：
8.6
通讯作者：
P. Ferrer;J. Iglesias;A. Castro
中科院分区：
文献类型：
--
作者：
P. Ferrer;J. Iglesias;A. Castro
本文报道了用机械力化学辅助方法合成氧化金SrBi4Ti4O15的结果。讨论了改变磨矿介质(振动磨机和行星式磨机)和机械处理长度的影响。用室温和高温X射线衍射仪、热分析和扫描电子显微镜对产物进行了表征。经机械力化学激活的非晶态前驱体在低温下热处理时，析出了一种新的与Sr−Bi−Ti−O萤石相关的相。与传统的陶瓷合成方法相比，可以在较短的温度(约500℃)和较短的反应时间(数天)内得到层状钙钛矿结构的铋。经机械处理的样品显示出约300 nm的均匀颗粒尺寸，随着进一步的热处理，颗粒尺寸增大。
This work reports the results obtained on the synthesis of the Aurivillius oxide SrBi4Ti4O15 as carried out by mechanochemically assisted methods. The effects of changing the milling media (vibrating and planetary mills) and the length of the mechanical treatment are discussed. The products obtained were characterized by X-ray diffraction at room and high temperatures, thermal analysis, and scanning electron microscopy. When an amorphous mechanochemically activated precursor is annealed at low temperatures, a novel Sr−Bi−Ti−O fluorite-related phase is isolated. The bismuth layered perovskite can be obtained with a significant decrease in temperature (of about 500 °C) and reaction time (several days), as compared with the conventional ceramic synthesis method. The mechanically treated samples exhibit a homogeneous particle size of around 300 nm, which increases with further thermal annealing.