Effect of Silica on the Stability of the Nanostructure and Texture of Fine-Particle Alumina Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2012, Volume: 53, Number: 1, Pages: 125-136 Pages count : 12 DOI: 10.1134/S0023158412010120 | ||||
| Tags | Calcination Temperature; High Specific Surface Area; Boehmite; Aluminum Oxide Sample; Extensive Defect | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Siberian Branch of the Russian Academy of Sciences | 36 |
| 2 | The Ministry of Education and Science of the Russian Federation | 2.1.1./10165 |
Abstract:
The effect of the modification of aluminum oxide with silicon oxide on the stability of fine-particle gamma- and delta-Al2O3 phases upon heat treatment in the wide temperature range of 550-1500 degrees C was studied. It was found that the gamma- and delta-Al2O3 phases modified with silica are thermally stable up to higher temperatures than pure aluminum oxide. This is due to changes in the real structure of the modified samples, specifically, an increase in the concentration of extensive defects stabilized by hydroxyl groups bound to not only aluminum atoms but also silicon atoms. It is likely that Si-OH groups, which are thermally more stable than Al-OH groups, stabilize the microstructure of gamma- and delta-Al2O3 to higher temperatures, as compared with aluminum oxide containing no additives. Simultaneously, an increase in the thermal stability of the modified samples is accompanied by the retention of a high specific surface area and a developed pore structure at higher treatment temperatures.
Cite:
Shutilov A.A.
, Zenkovets G.A.
, Tsybulya S.V.
, Gavrilov V.Y.
Effect of Silica on the Stability of the Nanostructure and Texture of Fine-Particle Alumina
Kinetics and Catalysis. 2012. V.53. N1. P.125-136. DOI: 10.1134/S0023158412010120 WOS Scopus РИНЦ OpenAlex ANCAN
Effect of Silica on the Stability of the Nanostructure and Texture of Fine-Particle Alumina
Kinetics and Catalysis. 2012. V.53. N1. P.125-136. DOI: 10.1134/S0023158412010120 WOS Scopus РИНЦ OpenAlex ANCAN
Original:
Шутилов А.А.
, Зенковец Г.А.
, Цыбуля С.В.
, Гаврилов В.Ю.
Влияние добавок оксида кремния на стабильность наноструктуры и текстуры высокодисперсных модификаций оксида алюминия
Кинетика и катализ. 2012. Т.53. №1. С.128-140. РИНЦ
Влияние добавок оксида кремния на стабильность наноструктуры и текстуры высокодисперсных модификаций оксида алюминия
Кинетика и катализ. 2012. Т.53. №1. С.128-140. РИНЦ
Dates:
| Submitted: | Mar 11, 2011 |
| Published print: | Feb 1, 2012 |
| Published online: | Feb 14, 2012 |
Identifiers:
| ≡ Web of science: | WOS:000302314100015 |
| ≡ Scopus: | 2-s2.0-84861140477 |
| ≡ Elibrary: | 17985500 |
| ≡ OpenAlex: | W2064644319 |
| ≡ Chemical Abstracts: | 2012:215005 |
| ≡ Chemical Abstracts (print): | 157:475393 |