高温炭化过程中晋城无烟煤分形的原位SAXS研究

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Philosophical Magazine Letters Pub Date : 2021-08-03 DOI:10.1080/09500839.2021.1936259

Yuexiang Wang, Zhihong Li, Jiao Kong, L. Chang, Dongfeng Li, Baoliang Lv

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引用次数: 7

摘要

摘要在北京同步辐射装置（BSRF）采用小角度X射线散射（SAXS）原位研究了晋城无烟煤在高温（1200°C）碳化过程中分形结构的变化。结果表明，在碳化过程中，无烟煤的结构由孔隙分形变为表面分形，再变回孔隙分形。随着温度的升高，样品的分形维数呈现出上升、下降、再次上升和下降的趋势，这可能对应于碳化过程中的物理解吸、热分解、热冷凝和残余碳老化四个阶段。孔隙分形存在于初始阶段和最终阶段，表面分形存在于中间两个阶段。

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In-situ SAXS study on fractal of Jincheng anthracite during high-temperature carbonisation

ABSTRACT The change in the fractal structure of anthracite mined in Jincheng, China, during high-temperature (1200°C) carbonisation was studied in situ by small-angle X-ray scattering (SAXS) at Beijing Synchrotron Radiation Facility (BSRF). The results show that, during carbonisation, the anthracite structure changes from a pore fractal to a surface fractal and then back to a pore fractal. With increase of temperature, the fractal dimension of the sample presents a trend of rise, decline, rise and decline again, which probably corresponds to the four stages of physical desorption, thermal decomposition, thermal condensation, and residual carbon aging in the process of carbonisation. The pore fractal exists in the initial and final stages, and the surface fractal exists in the middle two stages.

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来源期刊

Philosophical Magazine Letters 物理-物理：凝聚态物理

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： Philosophical Magazine Letters is the rapid communications part of the highly respected Philosophical Magazine, which was first published in 1798. Its Editors consider for publication short and timely contributions in the field of condensed matter describing original results, theories and concepts relating to the structure and properties of crystalline materials, ceramics, polymers, glasses, amorphous films, composites and soft matter. Articles emphasizing experimental, theoretical and modelling studies on solids, especially those that interpret behaviour on a microscopic, atomic or electronic scale, are particularly appropriate. Manuscripts are considered on the strict condition that they have been submitted only to Philosophical Magazine Letters , that they have not been published already, and that they are not under consideration for publication elsewhere.