PRACTICAL ASPECTS OF OBTAINING SPHERICAL NANODISPERSE GADOLINIUM OXIDE

The paper presents a method for the synthesis of spherical gadolinium oxide powders and the results of a study of the obtained samples characteristics. Gadolinium oxide powders were obtained by calcination in air at a temperature of 1000оC of gadolinium hydroxycarbonate previously synthesized by che...

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Главные авторы:	Kichuk, S. N., Кичук, С. Н., Chikulina, I. S., Чикулина, И. С., Vakalov, D. S., Вакалов, Д. С.
格式:	Статья
語言:	Russian
出版:	Ore and Metals Publishing house 2025
主題:	Deposition conditions Synthesis methods Gadolinium oxide Luminescent powders Microspheres Morphology of powders Production of spherical powders Spherical particles Nanocrystallites Oxides of rare earth metals
在線閱讀:	https://dspace.ncfu.ru/handle/123456789/30437
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id	ir-123456789-30437
record_format	dspace
spelling	ir-123456789-304372025-05-07T09:04:44Z PRACTICAL ASPECTS OF OBTAINING SPHERICAL NANODISPERSE GADOLINIUM OXIDE Kichuk, S. N. Кичук, С. Н. Chikulina, I. S. Чикулина, И. С. Vakalov, D. S. Вакалов, Д. С. Deposition conditions Synthesis methods Gadolinium oxide Luminescent powders Microspheres Morphology of powders Production of spherical powders Spherical particles Nanocrystallites Oxides of rare earth metals The paper presents a method for the synthesis of spherical gadolinium oxide powders and the results of a study of the obtained samples characteristics. Gadolinium oxide powders were obtained by calcination in air at a temperature of 1000оC of gadolinium hydroxycarbonate previously synthesized by chemical precipitation. The synthesis was carried out at different molar concentrations of the precipitated gadolinium nitrate solution (Gd(NO3)3• 6H2O) 0.02; 0.03; 0.034; 0.041; 0.047 mol/l and constant concentration of the precipitator – carbonic acid diamide (CO(NH2)2) (carbamide) 0.5 mol/l. Experimental samples of gadolinium oxide powders were obtained and their properties were studied. The phase composition was determined by X-ray phase analysis, and micrographs of the surface of gadolinium oxide powder were obtained by scanning electron microscopy. The influence of gadolinium hydroxycarbonate synthesis conditions on the morphology of gadolinium oxide powder obtained on its basis, in particular the pH and concentration of the precipitated solution, has been studied. It was determined that the synthesis of gadolinium hydroxycarbonate from dilute solutions (0.02 mol/l) contributes to the production of monodisperse gadolinium oxide powders consisting of microspheres of the order of 200 nm in size formed by nanocrystallites up to 40 nm in diameter. The optimal technological conditions are presented to facilitate the production of gadolinium oxide powder with specified properties and a yield of up to 90% of the calculated values. The pH value during precipitation of gadolinium hydroxycarbonate should be controlled and maintained throughout the synthesis within the values of 7–7.5. The factors influencing the technological losses and the yield of gadolinium oxide powder are determined. The work was performed using the equipment of the Center for the Collective Use of the North-Caucasus Federal University 2025-05-07T09:03:40Z 2025-05-07T09:03:40Z 2025 Статья Kichuk S.N., Chikulina I.S., Vakalov D.S. PRACTICAL ASPECTS OF OBTAINING SPHERICAL NANODISPERSE GADOLINIUM OXIDE // Tsvetnye Metally. - 2025. - 3. - pp. 43 - 47. - DOI: 10.17580/tsm.2025.03.06 https://dspace.ncfu.ru/handle/123456789/30437 ru Tsvetnye Metally application/pdf Ore and Metals Publishing house
institution	СКФУ
collection	Репозиторий
language	Russian
topic	Deposition conditions Synthesis methods Gadolinium oxide Luminescent powders Microspheres Morphology of powders Production of spherical powders Spherical particles Nanocrystallites Oxides of rare earth metals
spellingShingle	Deposition conditions Synthesis methods Gadolinium oxide Luminescent powders Microspheres Morphology of powders Production of spherical powders Spherical particles Nanocrystallites Oxides of rare earth metals Kichuk, S. N. Кичук, С. Н. Chikulina, I. S. Чикулина, И. С. Vakalov, D. S. Вакалов, Д. С. PRACTICAL ASPECTS OF OBTAINING SPHERICAL NANODISPERSE GADOLINIUM OXIDE
description	The paper presents a method for the synthesis of spherical gadolinium oxide powders and the results of a study of the obtained samples characteristics. Gadolinium oxide powders were obtained by calcination in air at a temperature of 1000оC of gadolinium hydroxycarbonate previously synthesized by chemical precipitation. The synthesis was carried out at different molar concentrations of the precipitated gadolinium nitrate solution (Gd(NO3)3• 6H2O) 0.02; 0.03; 0.034; 0.041; 0.047 mol/l and constant concentration of the precipitator – carbonic acid diamide (CO(NH2)2) (carbamide) 0.5 mol/l. Experimental samples of gadolinium oxide powders were obtained and their properties were studied. The phase composition was determined by X-ray phase analysis, and micrographs of the surface of gadolinium oxide powder were obtained by scanning electron microscopy. The influence of gadolinium hydroxycarbonate synthesis conditions on the morphology of gadolinium oxide powder obtained on its basis, in particular the pH and concentration of the precipitated solution, has been studied. It was determined that the synthesis of gadolinium hydroxycarbonate from dilute solutions (0.02 mol/l) contributes to the production of monodisperse gadolinium oxide powders consisting of microspheres of the order of 200 nm in size formed by nanocrystallites up to 40 nm in diameter. The optimal technological conditions are presented to facilitate the production of gadolinium oxide powder with specified properties and a yield of up to 90% of the calculated values. The pH value during precipitation of gadolinium hydroxycarbonate should be controlled and maintained throughout the synthesis within the values of 7–7.5. The factors influencing the technological losses and the yield of gadolinium oxide powder are determined. The work was performed using the equipment of the Center for the Collective Use of the North-Caucasus Federal University
format	Статья
author	Kichuk, S. N. Кичук, С. Н. Chikulina, I. S. Чикулина, И. С. Vakalov, D. S. Вакалов, Д. С.
author_facet	Kichuk, S. N. Кичук, С. Н. Chikulina, I. S. Чикулина, И. С. Vakalov, D. S. Вакалов, Д. С.
author_sort	Kichuk, S. N.
title	PRACTICAL ASPECTS OF OBTAINING SPHERICAL NANODISPERSE GADOLINIUM OXIDE
title_short	PRACTICAL ASPECTS OF OBTAINING SPHERICAL NANODISPERSE GADOLINIUM OXIDE
title_full	PRACTICAL ASPECTS OF OBTAINING SPHERICAL NANODISPERSE GADOLINIUM OXIDE
title_fullStr	PRACTICAL ASPECTS OF OBTAINING SPHERICAL NANODISPERSE GADOLINIUM OXIDE
title_full_unstemmed	PRACTICAL ASPECTS OF OBTAINING SPHERICAL NANODISPERSE GADOLINIUM OXIDE
title_sort	practical aspects of obtaining spherical nanodisperse gadolinium oxide
publisher	Ore and Metals Publishing house
publishDate	2025
url	https://dspace.ncfu.ru/handle/123456789/30437
work_keys_str_mv	AT kichuksn practicalaspectsofobtainingsphericalnanodispersegadoliniumoxide AT kičuksn practicalaspectsofobtainingsphericalnanodispersegadoliniumoxide AT chikulinais practicalaspectsofobtainingsphericalnanodispersegadoliniumoxide AT čikulinais practicalaspectsofobtainingsphericalnanodispersegadoliniumoxide AT vakalovds practicalaspectsofobtainingsphericalnanodispersegadoliniumoxide AT vakalovds practicalaspectsofobtainingsphericalnanodispersegadoliniumoxide
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PRACTICAL ASPECTS OF OBTAINING SPHERICAL NANODISPERSE GADOLINIUM OXIDE

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