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  2. Silica gel - Wikipedia

    en.wikipedia.org/wiki/Silica_gel

    Colloidal silica gel with light opalescence. Silica gel is an amorphous and porous form of silicon dioxide (silica), consisting of an irregular tridimensional framework of alternating silicon and oxygen atoms with nanometer-scale voids and pores. The voids may contain water or some other liquids, or may be filled by gas or vacuum.

  3. Transformer oil - Wikipedia

    en.wikipedia.org/wiki/Transformer_oil

    Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. It is used in oil-filled wet transformers, [1] some types of high-voltage capacitors, fluorescent lamp ballasts, and some types of high-voltage switches and circuit breakers.

  4. Silicone oil - Wikipedia

    en.wikipedia.org/wiki/Silicone_oil

    Consumer products to control flatulence often contain silicone oil. [citation needed] Silicone oils have been used as a vitreous fluid substitute to treat difficult cases of retinal detachment, such as those complicated with proliferative vitreoretinopathy, large retinal tears, and penetrating ocular trauma. [4]

  5. Sol–gel process - Wikipedia

    en.wikipedia.org/wiki/Sol–gel_process

    Ormosils (organically modified silicate) are obtained when silane is added to gel-derived silica during sol–gel process. The product is a molecular-scale composite with improved mechanical properties. Sono-Ormosils are characterized by a higher density than classic gels as well as an improved thermal stability. An explanation therefore might ...

  6. Aerogel - Wikipedia

    en.wikipedia.org/wiki/Aerogel

    The lowest-density silica nanofoam weighs 1,000 g/m 3, [58] which is the evacuated version of the record-aerogel of 1,900 g/m 3. [59] The density of air is 1,200 g/m 3 (at 20 °C and 1 atm). [60] The silica solidifies into three-dimensional, intertwined clusters that make up only 3% of the volume. Conduction through the solid is therefore very low.

  7. Silicification - Wikipedia

    en.wikipedia.org/wiki/Silicification

    These factors affect the silicification process in many ways. The rate of breakage of original cells controls the development of the mineral framework, hence the replacement of silica. [20] Availability of silica directly determines the silica content in fluids. The higher the silica content, the faster silicification could take place. [1]

  8. Liquid dielectric - Wikipedia

    en.wikipedia.org/wiki/Liquid_dielectric

    A liquid dielectric is a dielectric material in liquid state. Its main purpose is to prevent or rapidly quench electric discharges.Dielectric liquids are used as electrical insulators in high voltage applications, e.g. transformers, capacitors, high voltage cables, and switchgear (namely high voltage switchgear).

  9. Silicic acid - Wikipedia

    en.wikipedia.org/wiki/Silicic_acid

    Silicic acids can be seen as hydrated forms of silica, namely 2 H 2x SiO x+2 = SiO 2 ·(H 2 O) x. Indeed, in concentrated solutions, silicic acids generally polymerize and condense, and ultimately degrade to silicon dioxide and water. The intermediate stages may be very thick liquids or gel-like solids.