The Effect of Hydrothermal Treatment on Olivine Nano-Silica
Electronic Archive of Sumy State University
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
The Effect of Hydrothermal Treatment on Olivine Nano-Silica
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| Creator |
M.C. van de Griend
Lazaro, A. Brouwers, H.J.H. |
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| Subject |
Nano silica
Hydrothermal treatment Ripening Specific surface area Particle size Olivine |
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| Description |
This paper provides an overview of the effects of ripening the olivine nano-silica to form particles with a lower specific surface area for optimal use in high performance concrete. The nano-silica was ripened using a hydrothermal treatment in a mixed batch reactor at 90 °C, pH ranging from 8 to 10 and a silica weight percentage of three and six percent. The specific surface area of the olivine nano-silica can be reduced by 62 percent by Ostwald ripening in 22 hours. This reduction corresponds to a 80 percent drop of the micropore surface area and a 57 percent drop of the external surface area. The different hydrothermal conditions did not affect the final specific surface area at the equilibrium. However, the use of a high energy mixer reduced the specific surface area by 52 percent in only five minutes. Despite the reduction in specific surface area, the aggregates of the original olivine nano-silica are not dissolved during the ripening process. |
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| Publisher |
Sumy State University
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| Date |
2014-05-23T10:34:51Z
2014-05-23T10:34:51Z 2012 |
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| Type |
Article
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| Identifier |
M.C. van de Griend
The Effect of Hydrothermal Treatment on Olivine Nano-Silica [Текст] / M.C. van de Griend, A. Lazaro, H.J.H. Brouwers
// Nanomaterials: Applications & Properties (NAP-2012) : 2-nd International conference, Alushta, the Crimea, September 17-22, 2012 / Edited by: A. Pogrebnjak. - Sumy : Sumy State University, 2012. - V.1, No1. - 01PCN31
http://essuir.sumdu.edu.ua/handle/123456789/34915 |
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| Language |
en
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