silicon dioxide

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Related to Amorphous silica: diatomaceous earth, Crystalline silica

silicon dioxide

Silica.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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Noun

silicon dioxide - a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite

silica, silicon oxide

cristobalite - a white mineral consisting of silica; found in volcanic rocks

quartz - a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities

chert - variety of silica containing microcrystalline quartz

flint - a hard kind of stone; a form of silica more opaque than chalcedony

lechatelierite, quartz, quartz glass, vitreous silica, crystal - colorless glass made of almost pure silica

oxide - any compound of oxygen with another element or a radical

silex - a pure form of finely ground silica

tridymite - a mineral form of silica

Translations

piidioksidi

References in periodicals archive ?

Larger magnesium removal and the conversion of fibers into amorphous silica were obtained by increasing the strength of the acid treatment, namely by reducing pH and increasing time and temperature.

Sepiolite for rubber nanocomposites with high mechanical reinforcement and low dissipation of energy

This indicated that when firing at 2,192F (1,200C), amorphous silica will transform to [beta]-cristobalite.

HOW FIRING TIME AND Temperature Affect Investment Shells: Ultimately, the firing temperature and time at temperature clearly have a significant impact on the shell's thermo-physical properties

Opal-A (amorphous silica) can react with Ca[(OH).sub.2] to produce hydrated calcium silicate.

CHARACTERIZATION OF PORTUGUESE DIATOMITES IN ORDER TO ASSESS POTENTIAL APPLICATIONS

Strachan, "First-principles investigation of low energy E/center precursors in amorphous silica," Physical Review Letters, vol.

Structural and Optical Properties of [alpha]-Quartz Cluster with Oxygen-Deficiency Centers

At the same time, the XRD results indicate that the amorphous silica preferably crystallized into [alpha]-cristobalite when KD-S fibres were annealed in simulated atmosphere than in dry air.

Wet Oxidation Behavior of Near-Stoichiometric SiC Fibres in the Simulated Aeroengine Circumstance

There are three essential factors that cause the Alkali-Silica Reaction: alkalis, certain alkaline reactive amorphous silica minerals, and moisture having the role of the reagent and a transport media (Marku.

Susceptibility of Jhelum river bed aggregate to alkali silica reaction and its potential as construction aggregate

Considering that the solubility of amorphous silica was high at elevated temperatures [74], the calculated results should approximate the conditions of the experiments.

An Experimental Study of the Formation of Talc through CaMg[(C[O.sub.3]).sub.2]-Si[O.sub.2]-[H.sub.2]O Interaction at 100-200[degrees]C and Vapor-Saturation Pressures

At temperatures greater than 800[degrees]C, the amorphous silica present in sugarcane is converted in crystalline silica polymorphs, such as quartz, cristobalite, and tridymite [18].

Green Synthesis and Characterization of Biosilica Produced from Sugarcane Waste Ash

The main components in the additives on the surface of the toner particles are titanium dioxide (Ti[O.sub.2]) nanoparticles and amorphous silica nanoparticles.

Assessment of Pulmonary Toxicity Induced by Inhaled Toner with External Additives

The Energy Dispersive Spectrometry (EDS) and X-ray Diffraction (XRD) are carried out to confirm the presence amorphous silica in produced waste paper sludge.

DEVELOPMENT OF CEMENT REPLACEMENT MATERIAL / POZZOLAN FROM WASTE PAPER SLUDGE

Innovative Silica Technologies, a company involved in providing all-natural, sustainably produced silica for use in a wide array of applications, says that it has developed a patented process to produce some of the purest amorphous silica.

Innovative Silica Technologies produces patented process to produce purest amorphous silica

Huber Corporation, has launched a new packaging concept implemented at its Havre de Grace, Maryland, precipitated amorphous silica production facility.