silicon dioxide

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silicon dioxide:

see silicasilica
or silicon dioxide,
chemical compound, SiO2. It is insoluble in water, slightly soluble in alkalies, and soluble in dilute hydrofluoric acid. Pure silica is colorless to white.
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silicon dioxide

[′sil·ə·kən dī′äk‚sīd]
(inorganic chemistry)
SiO2 Colorless, transparent crystals, soluble in molten alkalies and hydrofluoric acid; melts at 1710°C; used to make glass, ceramic products, abrasives, foundry molds, and concrete.

silica, silicon dioxide

A white or colorless substance, nearly insoluble in water and in all acids except hydrofluoric; extremely hard; fuses to a colorless amorphous glass.

silicon dioxide

(SiO2) A hard, glassy mineral found in materials such as rock, quartz, sand and opal. In metal oxide semiconductor (MOS) chip fabrication, silicon dioxide is used to create the insulation layer between the metal gates of the top layer and the silicon elements below. See silica gel.
References in periodicals archive ?
2] and PVB is existing in PVB/ SiO2 compound material.
The SiO2 cable will withstand vibration to 45gs on earth and 110gs in space.
The chief precursors for SiO2 are tetraethyl orthosilicate (TEOS) and silane.
Rationale of Using Conventional Sol-Gel Derived SiO2 for Delivery of Biologically Active Agents
Leach conditions to measure available Avl Al2O3 and reactive SiO2 Rx were 1g leached in 10ml of 90gpl NaOH at 143 degrees C for 30 minutes Estimation of grades and thicknesses was done by an inverse distance squared modelling method using maximum extrapolations of 100 metres for Indicated Resources category and 150 metres for Inferred Resources.
The data shows that essentially there is only one Fe v SiO2 relationship which is linear for all three ore types tested.
Tenders are invited for Bhilai Steel Plant Intends To Procure 12800 Mt Of Sand For Blast Furnace Runner With Following Specification :- Specification: Sio2 = 80% Min.
This historic material finally reached its limit after successive scaling reduced the thickness of the SiO2 gate dielectric from 90 atomic layers in 1985 to approximately four layers today.
Tenders are invited for Bhilai Steel Plant Intends To Procure 3300 Mt Of Quartzite Sand With Following Specification :- Specification: Sio2 = 96% Min.
Leading edge PV cell manufacturers are improving cell efficiencies by adding water vapor to grow backside thick oxide films, adding SiO2 interface layers, and annealing interface layers to reduce grain boundary defects.