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Your search keyword '"O. Vereshchagin"' showing total 3 results
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3 results on '"O. Vereshchagin"'

1. The effect of addition of SO42− ions on the properties of ZrO2–7% Y2O3 powders obtained by hydroxide precipitation

Author

Sergey V. Bujnachev, Maxim A. Mashkovtsev, Artem O. Vereshchagin, Egor V. Gordeev, Nina V. Zhirenkina, Evgenie O. Baksheev, and Nikolay V. Obabkov

Subjects
chemistry.chemical_compound, Materials science, chemistry, Chemical engineering, Precipitation (chemistry), Hydroxide, Porosity, Constant (mathematics), Ion
Abstract

In this study, the effect of addition of SO42− ions on the properties of ZrO2–7 % Y2O3 powders prepared by hydroxides precipitation at a constant pH of 8 was studied. It is shown, that the addition of SO42− effect on the parameters of the specific surface and porosity of the powders.

Published
2018
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2. The effect of preliminary hydrolysis on the properties of ZrO2–7% Y2O3 powders prepared by hydroxide precipitation

Author

Nina V. Zhirenkina, Polina Bereskina, Artem O. Vereshchagin, Maxim A. Mashkovtsev, Evgenie O. Baksheev, Sergey V. Bujnachev, and Ilsur F. Zakirov

Subjects
Hydrolysis, chemistry.chemical_compound, Morphology (linguistics), Materials science, chemistry, Precipitation (chemistry), Scattering, Inorganic chemistry, Particle-size distribution, Hydroxide, Porosity
Abstract

In this study, the effect of preliminary hydrolysis of zirconyl oxysulfate on the properties of ZrO2–7 % Y2O3 powders prepared by hydroxides precipitation at a constant pH of 5 was studied. X-ray diffraction analysis showed the monophasic nature of the samples and the insignificant difference between CSR (coherent scattering regions). Samples differed in particle size distribution, porosity and morphology.

Published
2017
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3. The investigation of gadolinium oxide porous structure and refinement of the pore size distribution based on the NLDFT-models

Author

Artem O. Vereshchagin, Maxim Botalov, Denis Smyshlyaev, Maxim A. Mashkovtsev, Renata E. Kasimova, and Polina Bereskina

Subjects
Materials science, Distribution (mathematics), Adsorption, chemistry, Chemical engineering, Specific surface area, Desorption, Inorganic chemistry, chemistry.chemical_element, Porosity, Fractal dimension, Nitrogen, Characterization (materials science)
Abstract

The study focuses on the characterization of gadolinium oxide surface by the method of low-temperature adsorption/desorption of nitrogen. The specific surface area of gadolinium oxide, the average pore diameter and fractal dimensions were determined. The refinement of the pore distribution was performed on the basis of the NLDFT model. It was shown that there were three kinds of pores with average sizes of 150, 300 and 600 A.

Published
2016
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