A. M. Ayzenshtadt, E. V. Korolev, M. A. Malygina, T. A. Drozdyuk, M. A. Frolova
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Structural Modification of Fine Powders of Overburden Rocks of Saponite-Containing Bentonite Clay
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.
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.