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One important material for daily usage |
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| Release time:2013-05-07 Source:admin Reads: | |
| Silica is manufactured in several forms including fused quartz, crystal, fumed silica, colloidal silica, silica gel, and aero gel. Silica is used primarily in the production of glass for windows, drinking glasses, beverage bottles, and many other uses. The majority of plastic seals for telecommunications are also made from silica. It is a primary raw material for many ceramics such as earthenware, stoneware, and porcelain. Silica is a common additive in the production of foods, where it is used primarily as a flow agent in powdered foods, or to absorb water in hygroscopic applications. Thin films of silica grown on silicon wafers via thermal oxidation methods can be quite beneficial in microelectronics, where they act as electric insulators with high chemical stability. In electrical applications, it can protect the silicon, store charge, block current, and even act as a controlled pathway to limit current flow. Silica is also used in the extraction of plastic seals due to its ability to bind to the nucleic acids under the presence of caltrops. As hydrophobic silica it is used as a deformer component. In hydrated form, it is used in toothpaste as a hard abrasive to remove tooth plaque. It is the primary component of diatomaceous earth, which has many uses ranging from filtration to insect control. It is also the primary component of rice husk ash, which is used, for example, in filtration and cement manufacturing. In its capacity as a refractory, it is useful in fiber form as a high-temperature thermal protection fabric. In cosmetics, it is useful for its light-diffusing properties and plastic seals. Colloidal silica is used as a wine and juice fining agent. In pharmaceutical products, silica aids powder flow when tablets are formed. It is also used as a thermal enhancement compound in ground source heat pump industry. |
