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Wikipedia About Silica

Redir: Silica

The chemical compound silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with a chemical formula of Oxygen: 2 and has been known for its hardness since antiquity. Silica is most commonly found in nature as sand or quartz, as well as in the cell walls of diatoms. It is a principal component of most types of glass and substances such as concrete. Silica is the most abundant mineral in the earth's crust.

Manufactured forms

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  • Glass (a colorless, high-purity form is called fused silica)
  • Synthetic amorphous silica, silica gel
  • Fumed silica (also known as pyrogenic silica, colloidal silica, or under the genericized trademark, Cab-o-Sil)
  • Precipitated silica is produced by precipitation from a waterglass solution by acidification.
  • Silica aerogel.

Applications

It is used in the production of various products.

  • Inexpensive soda-lime glass is the most common and typically found in drinking glasses, bottles, and windows.
  • A raw material for many whiteware ceramics such as earthenware, stoneware and porcelain.
  • A raw material for the production of Portland cement.
  • A food additive, primarily as a flow agent in powdered foods, or to absorb water (see the ingredients list for).
  • The natural ("native") oxide coating that grows on silicon is hugely beneficial in microelectronics. It is a superior electric insulator, with high chemical stability. In electrical applications, it can protect the silicon, store charge, block current, and even act as a controlled pathway to allow small currents to flow through a device. At room temperature, however, it grows extremely slowly, and so to manufacture such oxide layers, the traditional method has been heating of silicon in high-temperature furnaces within an oxygen ambient (thermal oxidation).
  • Raw material for aerogel in the Stardust spacecraft
  • Used in the extraction of DNA and RNA due to its ability to bind to the nucleic acids under the presence of chaotropes.
  • As hydrophobic silica it is used as a defoamer component.
  • As hydrated silica in toothpaste (abrasive to remove plaque.)
  • As a high-temperature thermal protection fabric.
  • In cosmetics for its light-diffusing properties and its absorbency.
  • Liquid silicon dioxide (colloidal silica) is used as a wine and juice fining agent.
  • As a glidant in pharmaceutical products silicon dioxide aids powder flow when tablets are formed.
  • In the production of tires
  • Thermal enhancement compound used in thermal grouts for the ground source heat pump industry.

Inhalation health effects

Search results for Silica

Safety and Health Topics: Silica, Crystalline

What information is available about silica and its health effects? ... Control of Silica Exposure in Foundries. ... a New National Emphasis Program on Silica. ...www.osha.gov/SLTC/silicacrystalline/index.html

CRYSTALLINE SILICA PRIMER

Crystalline silica primer/staff, Branch of lndustrial Minerals. (Special publication) ... Stability Fields of the Different Forms of Silica In Glass, ...minerals.usgs.gov/minerals/pubs/commodity/silica/780292.pdf

Silca and Health

Silica plays an important role in many body functions and has a direct ... Both Iron and Silica are body essential, meaning they are needed for carrying ...home.mindspring.com/~vaughn/MPS.fldr/silca_and_health.htm

Silica

Four silica categories are covered in this report—industrial ... tripoli and other fine-grained, porous silica materials, such as ...minerals.er.usgs.gov/minerals/pubs/commodity/silica/silcmyb0...

Silica

Exposure to crystalline silica can cause silicosis, a serious lung disease. ... Information or observation which would indicate employee exposure to silica. ...www.radford.edu/~fpc/Safety/silica.htm

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News about Silica

A glimpse of Kinnick Stadium today

The GazetteMichael Graham, a University of Iowa chef and one of the folks behind the Web site " Hawkeye Hideout," posted this photo of the Kinnick Stadium field on Twitter today at about 12:15 p.m.It looks as though the green portion of the FieldTurf will be the next step.In May 2007, FieldTurf was the athletic surface for 2,000 sports facilities worldwide. For 48,000 hours of use, the maintenance of ...http://www.gazetteonline.com/apps/pbcs.dll/article?AID=/2009...

'Aravalli: Poor implementation will lead to illegal mining'

Calcutta NewsThe Supreme Court order Friday to continue the ban on mining activities in the Aravalli foothills in Haryana can only materialise if proper implementation by the state machinery is undertaken, the Federation of Indian Mining Industry (FIMI) has said.http://www.calcuttanews.net/story/499266

Green activists welcome extension of ban on Aravalli mining

Calcutta NewsLeading conservationists, environmental NGOs and even Haryana's environment minister Friday welcomed the Supreme Court's decision to extend a ban on mining in the state's Aravalli hills, one of the oldest mountain chains in India, saying it would check rampant ecological degradation.http://www.calcuttanews.net/story/499268

Greens welcome extension of ban on Aravalli mining

Calcutta NewsConservationists and even Haryana's environment minister Friday welcomed the Supreme Court decision to extend a ban on mining in the state's Aravalli hills, one of the oldest mountain chains in India, saying it would check rampant ecological degradation.http://www.calcuttanews.net/story/499252

Beating up Leatherwood Creek.

Harrison Daily TimesWhen May fades from the calendar, hiking options start to dwindle a bit. Trails get overgrown; June's heat and humidity become overbearing; snakes and poison ivy grace the land; and clouds of gnats who know not Deet rise from the febrile valley floor.http://www.harrisondaily.com/articles/2009/05/08/sports/hike...

News about Silica

How to tell from specific food cravings what your body really needs

San Francisco ExaminerA multiple mineral supplement, such as Eidon ionic liquid multiple minerals with silica can supply you with trace amounts of these minerals. But your body also needs to obtain various elements, minerals, and amino acids from whole, unprocessed fresh ... http://www.examiner.com/x-7160-Sacramento-Nutrition-Examiner...

Good primers for make-up

Women.timesonlineSilica microspheres, micronised polyethylene beads, clove extracts and witch hazel all help to absorb oil and control output. Worn under make-up or on its own, the skin is left matt, with oil under control. Lastly, if you find your T-zone gets ... http://women.timesonline.co.uk/tol/life_and_style/women/beau...

Column: Doctors want sand mine delayed until questions are answered

Chippewa HeraldThe question we addressed was particulate levels, especially as they pertain to crystalline silica levels in and around the plant. Dust and silica can cause and aggravate respiratory diseases, heart disease and, over a period of chronic exposure, may ... http://www.chippewa.com/articles/2009/05/04/news/doc49ff314b...

West Virginia has its tort heroes, too

Charleston Daily MailSilica, headquartered in Berkeley Springs. It has operations in 13 states. Strasser called Ulizio "the man who fought the tort bar - and won . . . a singular distinction in the world of runaway lawsuits." Ulizio, 53, is the son of a Pennsylvania steel ... http://www.dailymail.com/mostRecent/200905040435

Melting minerals found to be source of Tanzanian volcano's carbon ...

Newstrack IndiaThe lava expelled from the volcano is highly unusual in that it contains almost no silica and greater than 50 percent carbonate minerals. Typically, lavas contain high levels of silica, which increases their melting point to above 900 degree Celsius ... http://www.newstrackindia.com/newsdetails/94555

Search results for Silica

USGS Minerals Information: Silica

Statistics and information on the worldwide supply, demand, and flow of silicahttp://minerals.usgs.gov/minerals/pubs/commodity/silica/

Silica

Silica is the second most abundant element on earth, and humans have a critical need for this element. Silica is a vital mineral that is almost completely overlooked by mainstream ... http://www.tuberose.com/Silica.html

silica: Definition from Answers.com

silica n. A white or colorless crystalline compound, SiO 2 , occurring abundantly as quartz, sand, flint, agate, and many other minerals and used tohttp://www.answers.com/topic/silica

NIOSH: Silica Topic Page | CDC/NIOSH

This NIOSH Topic Page presents information and links to other resources about Silica and Silicosis, and provides information to help workers protect themselves from occupational ... http://www.cdc.gov/niosh/topics/silica/

silica - Definition of silica at YourDictionary.com

a glassy, very hard mineral, silicon dioxide, SiO, found in a variety of forms, as in quartz, opal, chalcedony, sand, or cherthttp://www.yourdictionary.com/silica

Wikipedia results for Silica

Silicon dioxide - Wikipedia, the free encyclopedia

The chemical compound silicon dioxide, also known as silica (from the Latin silex), is an oxide of silicon with a chemical formula of Si O 2 and has been known for its hardness ... http://en.wikipedia.org/wiki/Silica

Silica gel - Wikipedia, the free encyclopedia

Silica gel is a granular, porous form of silica made synthetically from sodium silicate. Despite the name, silica gel is a solid. Silica gel is most commonly encountered in ... http://en.wikipedia.org/wiki/Silica_gel

Silica fume - Wikipedia, the free encyclopedia

Silica fume, also known as microsilica, is a fine grain, low density and high surface area silica. It is sometimes confused with fumed silica (also known as colloidal silica and ... http://en.wikipedia.org/wiki/Silica_fume

Fused quartz - Wikipedia, the free encyclopedia

Fused quartz and fused silica are types of glass containing primarily silica in amorphous (non-crystalline) form. They are manufactured using several different processes.http://en.wikipedia.org/wiki/Fused_silica

Fumed silica - Wikipedia, the free encyclopedia

Fumed silica, also known as pyrogenic silica, is a non-crystalline, fine grain, low density and high surface area silica. Not to be confused with silica fume, also known as ... http://en.wikipedia.org/wiki/Fumed_silica
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Videos found for Silica

Review: CS Silica Powder Spheres

Review: CS Silica Powder Spheres**IMPORTANT: Hey ladies and gents, I hope that you understand what I mean and WHY I would tell you to do your own research on this product. There has been a lot of controversy...Flash - Video

Silica Ionic Moisturzng Lotion - 19...

Silica Ionic Moisturzng Lotion - 19 oz. - LotionReview of the Eidon LotionFlash - Video

Layering E/S Colors & 100% Silica P...

Layering E/S Colors & 100% Silica PowderHow to add texture/interest to a finished eye look. 100% Silica Powder.... Music Courtesy of Amel Larrieux-Get Up By facefab Tags : cosmetics , eyeshadow , facefab , hd , makeup ,...Video - Video

Silica: Find Experienced Legal Repr...

Silica: Find Experienced Legal Representation, Lawyers, AttorneysVideo in which Tony Malley of Brent Coon and Associates talks about silica and encourages those who may have been affected to use the case evaluator available on the site, from...Flash - Video

Silica Lemon Juice

Silica Lemon JuiceSilica Lemon Juice is the absolute best lemon juice product if you can't get real lemons.Flash - Video

Answers for Silica

patriciaHow much silica dust could my family been exposed to by walking on installed hardibacker board?patriciaUnless you are cutting it (with a power tool or grinder) or are sweeping up the area after cutting it, you're not going to be kicking up much dust. I doubt you have much to worry about.supa_bankI need to absorb moisture from enclosed box. I will use silica gel.How do I safely recycle it in big volume ?supa_bankFound a site that says you can recharge silica gel at 200 - 250 degrees F in an oven. Look here: http://photo.net/bboard/q-and-a-fetch-msg?msg_id=007l3f Also google "silica gel recharge"pianomannickHow much silica dust do you have to breathe for it to be fatal?pianomannickNO It takes years of exposure.gottalovkaitWhat is the percentage of silica in sandstone?gottalovkaitCaCO3 has a molecular wt of 100 CO2 has a molecular wt of 44 Calculation: 5.85mg x 100 / 44 = 13.3mg CaCO3 100% x (23.5mg - 13.3mg) / 23.5mg = 43.4% SilicaNick BCan I recharge silica gel desiccant bags by putting them in a food dehydrator?Nick BI checked with a company that makes silica get desiccants and they said the 30g pack can be put in an oven at 150 deg. F. for 3 hours. I would think a food dehydrator would work fine. Leave it in t...
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