Structural Modification of Fine Powders of Overburden Rocks of Saponite-Containing Bentonite Clay

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Inorganic Materials: Applied Research Pub Date : 2024-06-03 DOI:10.1134/s2075113324700199
A. M. Ayzenshtadt, E. V. Korolev, M. A. Malygina, T. A. Drozdyuk, M. A. Frolova
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Abstract—The kinetic regularities of the process of structural modification of highly dispersed powders of a saponite-containing material after mechanical dispersion are studied. Changes in the specific surface of the powders at different grinding times and exothermic thermal effects (changes in enthalpy) in a temperature range of 810–820°C are used as information criteria characterizing the rearrangements of the crystal lattice of the minerals. It is determined that, in the case of mechanical grinding of a saponite-containing material for more than 20 min, its structural changes leading to the formation of serpentine occur intensely. It is found that, in this case, the traditionally used criterion for evaluating the process of mechanical grinding of raw materials by the specific surface of the powder is not a sufficient information parameter when optimizing the structural changes in experimental specimens. The predominant parameter of this process is the enthalpy factor that characterizes the thermal effect of the structural modification.

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含皂石的膨润土覆盖岩细粉的结构改性
摘要 研究了含皂石材料的高度分散粉末在机械分散后结构改变过程的动力学规律。将不同研磨时间下粉末比表面的变化和 810-820°C 温度范围内的放热反应(焓的变化)作为表征矿物晶格重新排列的信息标准。结果表明,在对含有皂石的材料进行超过 20 分钟的机械研磨时,其结构会发生剧烈变化,从而形成蛇纹石。研究发现,在这种情况下,传统上使用的以粉末的比表面来评估原材料机械研磨过程的标准,在优化实验试样的结构变化时并不是一个充分的信息参数。这一过程的主要参数是焓系数,它表征了结构改变的热效应。
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来源期刊
Inorganic Materials: Applied Research
Inorganic Materials: Applied Research Engineering-Engineering (all)
CiteScore
0.90
自引率
0.00%
发文量
199
期刊介绍: Inorganic Materials: Applied Research  contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya  and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.
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