Characterization of amorphized zeolite a by combining high-energy X-ray diffraction and high-resolution transmission electron microscopy
Characterization of amorphized zeolite a by combining high-energy X-ray diffraction and high-resolution transmission electron microscopy
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DOI：
10.1021/jp305359q
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发表时间：
2012-11
影响因子：
3.7
通讯作者：
Kaku Sato;T. Wakihara;S. Kohara;K. Ohara;Junichi Tatami;A. Endo;S. Inagaki;I. Kawamura;A. Naito;Y. Kubota
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文献类型：
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作者：
Kaku Sato;T. Wakihara;S. Kohara;K. Ohara;Junichi Tatami;A. Endo;S. Inagaki;I. Kawamura;A. Naito;Y. Kubota
沸石通常是在机械应力作用下使用的，因此研究它们的力学性能对于在广泛的应用中进行强度设计是很有用的。我们结合高能X射线衍射和高分辨电子显微镜技术对A沸石进行了表征，以研究其在机械非晶化过程中原子排列的变化。利用这些技术证实了压应力降低了A沸石的T-O-T角和晶格骨架的变形。我们首次证明，至少有一个沸石非晶化过程是由于压应力使骨架结构变形而形成更高密度的非晶态材料所致。
Zeolites are often used under mechanical stress, and it is therefore useful to study their mechanical properties for strength design in a wide range of applications. We characterized zeolite A by combining high-energy X-ray diffraction and high-resolution transmission electron microscopy techniques to investigate changes in its atomic arrangement during mechanical amorphization. A decrease in the T–O–T angle and distortion of the zeolite A lattice framework by compressive stress were confirmed using these techniques. We showed for the first time that at least one of the zeolite amorphization processes is caused by distortion of the framework structure by a compressive stress to form a higher density noncrystalline material.