Nano-Pore Structure of Gaomiaozi Na-Bentonite by Synchrotron Radiation Small Angle X-ray Scattering

被引：0
作者：
Peng L. [1 ]
Li X. [1 ]
Du S. [1 ]
Hou D. [1 ]
Zhao Y. [2 ]
Hua P. [1 ,3 ]
Yang K. [1 ]
Li D. [1 ]
Chen X. [1 ]
机构：
[1] Department of Civil Engineering, Shanghai Jiaotong University, Shanghai
[2] School of Energy and Mining Engineering, China University of Mining and Technology, Beijing
[3] College of Computing, Georgia Institute of Technology, Atlanta, 30332, GA
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2019年 / 47卷 / 10期
关键词：
Nuclear waste; Small angle X-ray scattering; Sodium bentonite; Synchrotron radiation;
D O I：
10.14062/j.issn.0454-5648.2019.10.13
中图分类号：
学科分类号：
摘要：
The nanopore structure of sodium-bentonites (from Inner Mongolia, China) was characterized by a synchrotron radiation small-angle X-ray scattering (SAXS) technique. The FIT2D data processing and background subtraction were used to calibrate based on the Porod calibration. The pore size distribution and the Guinier curve were determined, and the radius of gyration and aperture size were obtained via approximating and extrapolating the small angle region. Also, the fractal dimension was determined based on the slope of double logarithmic curve. The results show that the scattering intensity of GMZ07 is greater than that of GMZ001. The Porod positive deviation effect indicates that uneven zone causing microdensity fluctuation could be due to the presence of amorphous component in bentonite. GMZ001 is better than GMZ07, and the pore size is concentrated. The average pore size and the most probable pore size of GMZ07 are smaller than those of GMZ001. The average pore size estimated based on the maximum entropy theory is greater than that estimated by the Guinier curve, but the difference is small. The fractal types and dimensions are similar, indicating the similar complexities of two bentonites. © 2019, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：1458 / 1466
页数：8
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