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 CAPlusCA OpenAlex
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 CAPlusCA OpenAlex
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 |