Fragmentation of SiO2 Aerogels in Aqueous NaOH Solutions Studied in situ by SAXS Using SR Научная публикация
Конференция |
XII National Synchrotron Radiation Conference 13-18 июл. 1998 , Новосибирск |
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Журнал |
Nuclear Instruments and Methods in Physics Research Section A
ISSN: 0168-9002 |
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Вых. Данные | Год: 2000, Том: 448, Номер: 1-2, Страницы: 261-266 Страниц : 6 DOI: 10.1016/S0168-9002(99)00731-7 | ||
Ключевые слова | Aerogels; Deformation; Dissolution; Percolation (solid state); pH effects; Sodium compounds; Synchrotron radiation; X ray scattering | ||
Авторы |
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Организации |
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Информация о финансировании (3)
1 | Российский фонд фундаментальных исследований | 97-03-32471 |
2 | Сибирское отделение Российской академии наук | |
3 | Министерство образования и науки Российской Федерации | 3H-256-97 |
Реферат:
Structural deformations of three types of silica aerogels due to their dissolution in aqueous solution of NaOH at pH=13.6–13.9 have been explicitly studied in situ using small angle X-ray scattering of synchrotron radiation. For all aerogels studied the scattered intensity I is found to increase rapidly in the scattering vector range h=0.15–0.6 nm−1 that indicates the aerogel threshold disintegration. When the scattering at h=0.15 nm−1 reaches the maximum the dependency of LnI on Lnh gives a straight line with the slope critically depending on the pH of solution and, to a lesser extent, on the nature of the aerogel. The observed phenomena are discussed in terms of the percolation theory.
Библиографическая ссылка:
Okunev A.G.
, Shmakov A.N.
, Danilyuk A.F.
, Aristov Y.I.
Fragmentation of SiO2 Aerogels in Aqueous NaOH Solutions Studied in situ by SAXS Using SR
Nuclear Instruments and Methods in Physics Research Section A. 2000. V.448. N1-2. P.261-266. DOI: 10.1016/S0168-9002(99)00731-7 WOS Scopus РИНЦ
Fragmentation of SiO2 Aerogels in Aqueous NaOH Solutions Studied in situ by SAXS Using SR
Nuclear Instruments and Methods in Physics Research Section A. 2000. V.448. N1-2. P.261-266. DOI: 10.1016/S0168-9002(99)00731-7 WOS Scopus РИНЦ
Даты:
Опубликована в печати: | 21 июн. 2000 г. |
Опубликована online: | 22 июн. 2000 г. |
Идентификаторы БД:
Web of science | WOS:000088282500054 |
Scopus | 2-s2.0-0034206142 |
РИНЦ | 13345363 |
Chemical Abstracts | 2000:434628 |
Chemical Abstracts (print) | 133:243210 |
OpenAlex | W2129685758 |