Journal ArticleDOI
Preparation of Black Amorphous Silica from Rice Husks
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In this article, the formation of carbon containing amorphous silica from rice husks has been studied in detail and three parameters, viz., purity, temperature of calcination and rate of heating have been found to affect the formation.Abstract:
The formation of black (carbon containing) amorphous silica from rice husks has been studied In detail. Three parameters, viz., (i) purity, (II) temperature of calcination and (iii) rate of heating have been found to affect the formation of black silica. The formation of black silica is higher in untreated rice husks than that in acid treated rice husks. The tendency to form black silica increases with the increase In the heating rate and the temperature of calcination of untreated rice husks. By treating with 3N HCI acid the formation of black silica can be avoided. Using a dopant/ catalyst, black amorphous silica stable in air up to 1000°C was prepared from acid treated rice husks.read more
Citations
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Effect of organic acid treatment on the properties of rice husk silica
TL;DR: In this paper, two rice husk samples of different origin, one from the state of Andhra Pradesh (APRH) in the central part of India and the other from Kerala (KRH) the southern most part of the country, were compared for optical properties.
Journal ArticleDOI
Barium borosilicate glass coatings based on biomass for steel surfaces: Use of rice husk ash
TL;DR: In this article , the recycling or reuse of rice husk ash (RHA) in the production of silicate-based glass coatings for metal surfaces was discussed, where the highest percentage of SiO2 ratio in the chemical composition was selected for further assessment by increasing the heat treatment duration.
References
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Journal ArticleDOI
Silicon-Based Materials from Rice Husks and Their Applications
Luyi Sun,Kecheng Gong +1 more
TL;DR: In this article, the methods of synthesizing silicon-based materials from rice husks and their applications are reviewed in a very comprehensive manner, including silicon carbide, silica, silicon nitride, silicon tetrachloride, and pure silicon.
Journal ArticleDOI
Preparation of Silica from Rice Husks
TL;DR: In this paper, preliminary leaching of rice husks with a solution of hydrochloric acid before their combustion at 600°C is shown to be required to obtain relatively pure silica (∼99.5%) with a high specific surface area that is maintained even after heating at 800°C.
Journal ArticleDOI
Formation and Structure of Silicon Carbide Whiskers from Rice Hulls
TL;DR: A study of the distribution of Si in rice hulls was carried out to aid in understanding the observed formation of SIC whiskers by the thermal decomposition and reaction of these natural materials.
Journal ArticleDOI
Preparation and properties of oxynitride glasses
TL;DR: In this article, the possibility of redox reaction between a given oxide and nitride can be predicted by comparing ΔG° for the oxide with ΔG ≥ for oxidation of the nitride.
Journal ArticleDOI
Investigations on the production of silicon from rice husks by the magnesium method
TL;DR: In this paper, it was shown that amorphous silica can be reduced to polycrystalline silicon by magnesium at a comparatively low temperature (about 600°C) using differential thermal analysis and thermogravimetric analysis.