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• VOL 93, No. 9 (2020)

The kinetics of sintering of periclase with a brucitaluminophosphate bond has been studied. To determine the kinetic parameters, a model was used that takes into account the role of physical compaction and chemical bonding in the presence of a binder during heating. The strength of the conglomerate was ensured both by the sintering itself and by the action of the binder. Determined the effective activation energy of periclase sintering: Ea = 287 & plusm; 9 kJ / mol, which is close to the activation energy of oxygen diffusion in MgO. At high temperatures, spinel MgAl ₂ O ₄ forms in the material, which slows down sintering

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• VOL 93, No. 9 (2020)

The results of studies on obtaining refractory light weights using chamotte as a filler, obtained by melting a mixture of kaolinite clay and alumina-containing production wastes under the influence of a concentrated radiant flux, are presented. The phase composition, microstructure, and physical and technical characteristics of the sintered samples have been determined. It was found that the optimal set of properties (apparent density 1.14 - 1.3 g / cm ³ , compressive strength 8.6 - 17.1 MPa) are possessed by specimens based on fused chamotte with a mass content 10 & ndash; 20 & # 37; alumina-containing additive, due to the favorable combination of phase composition and microstructure

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• VOL 93, No. 9 (2020)

The use of nanotechnogenic aluminum-containing raw materials and pyrophyllite in the compositions of ceramic masses for the production of acid-resistant materials helps to reduce the shrinkage anisotropy during drying and firing and water permeability, but samples of the composition containing nanotechnogenic aluminum-containing raw materials have the best indicators of water permeability. The introduction of pyrophyllite into the compositions of ceramic masses for the production of acid-resistant materials contributes to the formation of a significant accumulation of well-developed acicular-shaped mullite crystals, and the introduction of nanotechnogenic raw materials promotes the formation of whiskers of mullite

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• VOL 93, No. 9 (2020)

The object of the study was kaolin mineral raw materials from the Svetlinsky district of the Orenburg region. The characteristics of the clay were obtained by using the methods of particle size distribution, colorimetric, chemical and X-ray fluorescence, X-ray phase and sorption analyzes, and EPR spectroscopy. Analysis of the results of the study of the main characteristics of kaolin clay allows us to conclude that it can be used for the manufacture of electric porcelain.

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• VOL 93, No. 9 (2020)

An experience of physical and chemical analysis of some fragments of medieval glazed ceramics, discovered at different times in the area of ??medieval settlements located in the Chui, Talas and Kochkor valleys of Kyrgyzstan, has been undertaken. Samples of glazed ceramics have been studied by X-ray fluorescence and microscopic analyzes. Physicochemical studies of glaze ceramics from different archaeological complexes on the territory of Kyrgyzstan made it possible to identify dyes, their features, technology for obtaining color and to note important points in the historical development of pottery related to the history of glazed ceramics in Central Asian countries.

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• VOL 93, No. 8 (2020)

Using the example of glass of composition 15Na ₂ O * 10CaO * 75SiO2, the possibility of forming current-carrying buses on an electrically conductive coating by the & # 171; cold & # 187; gas-dynamic spraying

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• VOL 93, No. 8 (2020)

An informational analysis of the yield of suitable glass in the production process has been carried out. The influence of waste from individual production stages on the utilization rate of glass is shown. A model was compiled using fuzzy systems to describe the dependence of the utilization rate of glass on the chemical composition of the charge, glass and technological modes of molding and annealing of a glass ribbon. The proposed method for analyzing the utilization rate of glass can be used in quality management systems in the production of flat glass by the float method.

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• VOL 93, No. 8 (2020)

A radio-absorbing glass, transparent in the visible region of the spectrum, has been developed. The radioprotective effect was obtained by implanting accelerated ions of transition elements into the surface layer of glass, not exceeding 100 nm, which form nanoparticles in the glass that absorb electromagnetic radiation. Measurements of the absorption of electromagnetic radiation (EMR) by implanted model and sheet glasses showed that the attenuation of the EMR power is in the range of 6.2 - 30.2 dB for phosphate glass and 7.8 - 34.1 dB for silicate glasses. The greatest radioprotective effect is observed on glasses implanted with Ni ⁺ nickel and Co ⁺ cobalt. EMI absorption can be increased to 37.5 dB by heat treatment

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• VOL 93, No. 8 (2020)

A technology has been developed for the production of glass-silica based on the wastes of enrichment of ferruginous quartzites of the Kursk Magnetic Anomaly (KMA) of the Lebedinsky GOK and fractionated broken glass of colored container glasses. The use of wastes of enrichment of ferruginous quartzites KMA allowed to reduce the sintering temperature and improve the quality of glass silica. The obtained glass silica has high operational and aesthetic-consumer properties.

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• VOL 93, No. 8 (2020)

The substantiation and development of a methodology for a comprehensive study of the physical and mechanical properties of ceramic compositions of the system grain - ceramic binder - pores using nonparametric regression analysis are considered. Its algorithm and implementation example are given.