Diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt

Isotermal desorption of impurity matrix atoms (as CO, CO₂, H₂, H₂O) out os sapphire bulk has been studied. A theoretical model has been proposed for diffusion mechanism of the atoms included in gas-vacancy complexes 2Vᶦ-Mᶦ (Mᶦ being an atom, Vᶦ, a neutral vacancy). According to the model, the gas-va...

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Дата:2006
Автори: Katrich, N.P., Budnikov, A.T., Krivonogov, S.I., Miroshnikov, Yu.P.
Формат: Стаття
Мова:English
Опубліковано: НТК «Інститут монокристалів» НАН України 2006
Назва видання:Functional Materials
Онлайн доступ:http://dspace.nbuv.gov.ua/handle/123456789/140078
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Цитувати:Diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt / N.P. Katrich, A.T. Budnikov, S.I. Krivonogov, Yu.P. Miroshnikov // Functional Materials. — 2006. — Т. 13, № 1. — С. 44-53. — Бібліогр.: 7 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
id irk-123456789-140078
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spelling irk-123456789-1400782018-06-23T03:02:52Z Diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt Katrich, N.P. Budnikov, A.T. Krivonogov, S.I. Miroshnikov, Yu.P. Isotermal desorption of impurity matrix atoms (as CO, CO₂, H₂, H₂O) out os sapphire bulk has been studied. A theoretical model has been proposed for diffusion mechanism of the atoms included in gas-vacancy complexes 2Vᶦ-Mᶦ (Mᶦ being an atom, Vᶦ, a neutral vacancy). According to the model, the gas-vacancy complexes are formed due to breaking to the surface thereof becomes desorbed while another one becomes recombined into molecules and then desorbed. The equations describing the deffusion and desorption have been derived. The diffusion and desorption parameters have been determined for the atoms and molecules. Досліджено ізотермічну десорбцію домішкових та матричних атомів з об'єму сапфіру у складі CO, CO₂, H₂, H₂O. Запропоновано теоретичну модель механізму дифузії атомів у сапфірі у складі газо-вакансійних комплексів 2Vᶦ-Mᶦ (Mᶦ - атом, Vᶦ - нейтральна вакансія). Згідно з моделлю, газо-вакансійні комплекси утворюються внаслідок розриву іонно-ковалентноих зв'язків у сапфірі. Домішкові та матричні атоми, після чого одна частка їх десорбується, а інша рекомбінує у молекули, а потім десорбується. Одержано рівняння, що описують дифузію та десорбцію, визначено параметри дифузії та десорбції атомів та молекул. Исследована изотермическая десорбция примесных и матричных атомов из объема сапфира в составе CO, CO₂, H₂, H₂O. Предложена теоретическая модель механизма диффузии атомов в сапфире в составе газ-вакансионных комплексов 2Vᶦ-Mᶦ (Mᶦ - атом, Vᶦ - нейтральная вакансия). Согласно модели газ-вакансионных комплексы образуются в результате разрыва ионно-ковалентных связей в сапфире. Примесные и матричные атомы, продиффундировав к поверхности в составе комплексов, переходят в адсорбированное состояние, затем одна часть их десорбируется. Получены уравнения, описывающие диффузию и десорбцию, определены параметры диффузии и десорбции атомов и молекул. 2006 Article Diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt / N.P. Katrich, A.T. Budnikov, S.I. Krivonogov, Yu.P. Miroshnikov // Functional Materials. — 2006. — Т. 13, № 1. — С. 44-53. — Бібліогр.: 7 назв. — англ. 1027-5495 http://dspace.nbuv.gov.ua/handle/123456789/140078 en Functional Materials НТК «Інститут монокристалів» НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
description Isotermal desorption of impurity matrix atoms (as CO, CO₂, H₂, H₂O) out os sapphire bulk has been studied. A theoretical model has been proposed for diffusion mechanism of the atoms included in gas-vacancy complexes 2Vᶦ-Mᶦ (Mᶦ being an atom, Vᶦ, a neutral vacancy). According to the model, the gas-vacancy complexes are formed due to breaking to the surface thereof becomes desorbed while another one becomes recombined into molecules and then desorbed. The equations describing the deffusion and desorption have been derived. The diffusion and desorption parameters have been determined for the atoms and molecules.
format Article
author Katrich, N.P.
Budnikov, A.T.
Krivonogov, S.I.
Miroshnikov, Yu.P.
spellingShingle Katrich, N.P.
Budnikov, A.T.
Krivonogov, S.I.
Miroshnikov, Yu.P.
Diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt
Functional Materials
author_facet Katrich, N.P.
Budnikov, A.T.
Krivonogov, S.I.
Miroshnikov, Yu.P.
author_sort Katrich, N.P.
title Diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt
title_short Diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt
title_full Diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt
title_fullStr Diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt
title_full_unstemmed Diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt
title_sort diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt
publisher НТК «Інститут монокристалів» НАН України
publishDate 2006
url http://dspace.nbuv.gov.ua/handle/123456789/140078
citation_txt Diffusion and following isothermal desorption of impurity and matrix atoms out of sapphire and its melt / N.P. Katrich, A.T. Budnikov, S.I. Krivonogov, Yu.P. Miroshnikov // Functional Materials. — 2006. — Т. 13, № 1. — С. 44-53. — Бібліогр.: 7 назв. — англ.
series Functional Materials
work_keys_str_mv AT katrichnp diffusionandfollowingisothermaldesorptionofimpurityandmatrixatomsoutofsapphireanditsmelt
AT budnikovat diffusionandfollowingisothermaldesorptionofimpurityandmatrixatomsoutofsapphireanditsmelt
AT krivonogovsi diffusionandfollowingisothermaldesorptionofimpurityandmatrixatomsoutofsapphireanditsmelt
AT miroshnikovyup diffusionandfollowingisothermaldesorptionofimpurityandmatrixatomsoutofsapphireanditsmelt
first_indexed 2025-07-10T09:44:01Z
last_indexed 2025-07-10T09:44:01Z
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