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Modelling of the cation motions in complex system: case of Na-mordenites

机译:复杂系统中阳离子运动的建模:钠丝光沸石的情况

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摘要

Semi-empirical inter-atomic potentials and Monte Carlo algorithms are proposed to predict the evolution of the interaction energy between sodium ions and a mordenite type alummosilicate network as a function of Si/Al ratio. This result is favourably compared with the activation energy barriers for Na+ 'jumps' responsible for the polarization change, measured by thermally stimulated current (TSC) spectroscopy, for Na-mordenites characterized by Si/Al ratios ranged from 5.5 to 12. Finally, we propose a possible mechanism for the cation motions, which involves activation barriers within the same order of magnitude than those measured by TSC. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 33]
机译:提出了半经验的原子间电势和蒙特卡罗算法来预测钠离子和丝光沸石型铝硅酸盐网络之间相互作用能随Si / Al比的变化。该结果与通过热激发电流(TSC)光谱法测量的特征为Si / Al比范围为5.5至12的Na-丝光沸石对引起极化变化的Na +'跃迁'的激活能垒相比具有优势。提出了一种可能的阳离子运动机理,其中涉及与TSC测量的活化势垒数量级相同的活化势垒。 (C)2002 Elsevier Science B.V.保留所有权利。 [参考:33]

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