研磨条件对三水铝石分解动力学的影响

IF 2.7 4区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Boletin de la Sociedad Espanola de Ceramica y Vidrio Pub Date : 2023-05-01 DOI:10.1016/j.bsecv.2023.02.003

Aluisio A. Cabral , Jose M. Rivas-Mercury , Jose R.M. Sucupira , Miguel A. Rodríguez , Antonio H. De Aza , Pilar Pena , Elena Moukhina

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引用次数: 0

摘要

合成三水铝石（Al（OH）3）通过研磨24小时进行机械活化，研磨球与粉末的重量比不同（0、5、10和20），并通过热分析（TG-DSC）进行表征。此外，我们使用热重分析（TG）数据集的无模型和模型拟合方法确定了相应的动力学参数。我们发现两个模型提供的活化能非常一致。在高于350°C的温度下，研磨样品（GB5、GB10和GB20）的质量损失非常缓慢，而未研磨样品（GB0）的分解速度更快。此外，我们证明了每个样品的分解机制涉及多步反应，并且相应的活化能随着研磨条件的增加而变化。

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Effect of the milling conditions on the decomposition kinetics of gibbsite

Synthetic gibbsite (Al(OH)₃) was mechanically activated by attrition milling for 24 h, with various grinding ball-to-powder weight ratios (0, 5, 10, and 20), and characterized by thermal analysis (TG-DSC). Further, we determined the corresponding kinetic parameters using the model-free and model-fitting methods from the Thermogravimetric Analysis (TG) data set. We found that the activation energies provided by both models agree very well. At temperatures higher than 350 °C, the milled samples (GB5, GB10, and GB20) lose mass very slowly, while the unmilled sample (GB0) decomposes faster. In addition, we demonstrated that the decomposition mechanism of each sample engages multi-step reactions, and the corresponding activation energies change with the increasing milling conditions.

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来源期刊

Boletin de la Sociedad Espanola de Ceramica y Vidrio 工程技术-材料科学：硅酸盐

CiteScore

5.50

自引率

2.90%

发文量

审稿时长

103 days

期刊介绍： The Journal of the Spanish Ceramic and Glass Society publishes scientific articles and communications describing original research and reviews relating to ceramic materials and glasses. The main interests are on novel generic science and technology establishing the relationships between synthesis, processing microstructure and properties of materials. Papers may deal with ceramics and glasses included in any of the conventional categories: structural, functional, traditional, composites and cultural heritage. The main objective of the Journal of the Spanish Ceramic and Glass Society is to sustain a high standard research quality by means of appropriate reviewing procedures.