Silica Sand Essay

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Silica sand is a sort of silicate mineral and largely compose of silicon dioxide (SiO2) (Liua et al., 2015). It is easily available in all parts of the world and is commonly used for the production of dams, ceramic matrix composites, bridges, construction of buildings, roads and bricks as well as in the production of refractory materials for high temperature furnaces. Some of the most important properties of silica sand are high chemical resistance, good insulation, high hardness, high temperature resistance, high wear resistance brittleness, high tensile and compressive strength (Rizlan and Mamat, 2014a).
Nanoparticles of silica sand have been researching and producing progressively due to the unique features of nano scale size. Silica sand …show more content…

Preparing silica sand nanoparticles in this study have been compare between chemical and physical processes. For chemical synthesis two method are used to produce silica nanoparticles. The first is purification of SiO2 from impurities using alkali solid (dry process). The dry process mixed SiO2 and NaOH pellets with different ratio and then heat. The second is wet process using silica sand via a hydrothermal process varies concentration of NaOH solutions (5M, 6M, and 7M) regarding to Munasir (2015). For physical process, the high speed ball milling process is employed to reduce the silica sand to nanoparticles size according to Rizlan (2014). The size of silica sand nanoparticles will be investigate by particle size analysis. Before applying the silica nanoparticles to ceramic surface, the particles will be treated with dehydratrichloro according to Ogihara (2012) because this method is simple and not require instrumental investment, extreme reaction conditions, and specialized nanomaterials. The sol-gel produced from this method can be applied by the spray-coating method which is a simple one-step, low cost process. Finally, the surface modified ceramic (which using Portland cement as a sample in this study) will be test for superhydrophobic propertied via contact angle measurement (Ogihara et al.,

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