碳酸钠向碳酸氢盐的机械化学转化动力学的傅里叶变换红外光谱分析

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Science of Sintering Pub Date : 2022-01-01 DOI:10.2298/sos2204481d

N. Djordjevic, M. Vlahović, Slavica Mihajlović, Sanja Martinović, Nenad Vušović, Jasmina Lozanović-Šajić

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引用次数: 0

摘要

在机械活化过程中，材料会发生质变，从而产生各种现象。在这项研究中，无水碳酸钠在振动磨机中以每分钟3000次振荡的频率机械活化2、7、14和28分钟。活化后的4个系列的活化样品在室温空气中保存31天(松弛期)。为了监测活化碳酸钠样品的转化动力学，即弛豫过程中碳酸氢钠的形成机理，采用傅里叶变换红外光谱分析方法。对所有四个系列样品进行FTIR测试，作为松弛时间的函数，观察到特征组:CO32-， HCO3-和OH-。所得结果为由于大气中水分和二氧化碳的化学吸附而使碳酸钠转化为碳酸氢钠提供了动力学参数。

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Fourier-transform infrared spectroscopy analysis of mechanochemical transformation kinetics of sodium carbonate to bicarbonate

During mechanical activation, qualitative changes that can produce various phenomena occur in the material. In this study, anhydrous sodium carbonate was mechanically activated for 2, 7, 14, and 28 minutes in a vibro mill at a frequency of 3000 oscillations per minute. After activation, four series of activated samples were stored in the air at room conditions for 31 days (relaxation period). To monitor the kinetics of the transformation process of activated sodium carbonate samples, i.e. the mechanism of sodium bicarbonate formation during relaxation, Fourier-transform infrared (FTIR) spectroscopy analysis was used. FTIR testing was performed as a function of relaxation time for all four series of samples, with characteristic groups observed: CO32-, HCO3- and OH-. The obtained results provided kinetics parameters for the transformation of sodium carbonate into sodium bicarbonate due to the chemisorption of moisture and carbon dioxide from the atmosphere.

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来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.