Difference between revisions of "Silicon carbide"

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== Description ==
 
== Description ==
  
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An extremely hard synthetic [http://cameo.mfa.org/materials/fullrecord.asp?name=abrasive abrasive]. Silicon carbide was discovered in 1884 by E.G. Acheson and named [http://cameo.mfa.org/materials/fullrecord.asp?name=Carborundum Carborundum]. He made it made by fusing [http://cameo.mfa.org/materials/fullrecord.asp?name=coke coke] with [http://cameo.mfa.org/materials/fullrecord.asp?name=sand sand] in [http://cameo.mfa.org/materials/fullrecord.asp?name=clay clay]. Silicon carbide is resistant to thermal shock, thermal expansion, and high temperatures. The green to black powder is one of the hardest substances known to man. It is a good conductor of heat and electricity. Silicon carbide is used as an abrasive for polishing glass, granite, and bisque ware. It is also used in the manufacture of porcelain, emery paper, shoe soles, antiskid flooring, kiln shelves, and furnace linings. Moissanite is a jewel quality stone made from silicon carbide that was introduced in 1998 as a simulated diamond.
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An extremely hard synthetic [[abrasive|abrasive]]. Silicon carbide was discovered in 1884 by E.G. Acheson and named [[Carborundum|Carborundum]]. He made it made by fusing [[coke|coke]] with [[sand|sand]] in [[clay|clay]]. Silicon carbide is resistant to thermal shock, thermal expansion, and high temperatures. The green to black powder is one of the hardest substances known to man. It is a good conductor of heat and electricity. Silicon carbide is used as an abrasive for polishing glass, granite, and bisque ware. It is also used in the manufacture of porcelain, emery paper, shoe soles, antiskid flooring, kiln shelves, and furnace linings. Moissanite is a jewel quality stone made from silicon carbide that was introduced in 1998 as a simulated diamond. Synthetic moissanite gemstones can be optically similar to diamonds, but can be distinguished because of their thermochromism (change in color with gradual heating), electrical conductivity and birefringence.
  
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  
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Carborundum; Unirundum; Carbofrax; Urundum; Siliziumcarbid (Deut.); carbure de silicium; siliciumcarbide (Ned.); kiselkarbid (Sven.); moissanite
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moissanite; Carborundum; Unirundum; Carbofrax; Urundum; Siliziumcarbid (Deut.); carbure de silicium; siliciumcarbide (Ned.); kiselkarbid (Sven.); Forever One; Forever Brilliant; Forever Classic; Amora
  
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[[[SliderGallery rightalign|siliconcarbideRS.jpg~Raman]]]
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[[[SliderGallery rightalign|siliconcarbideRS.jpg~Raman (RASMIN)]]]
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== Risks ==
  
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== Other Properties ==
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* May produce a hazy glaze if residues are left on biscuit.
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* Noncombustible.
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* Potential carcinogen. 
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* Contact may cause mechanical irritation. 
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* Fisher Scientific: [https://fscimage.fishersci.com/msds/20700.htm MSDS]
  
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Luster = metallic  Soluble in fused alkalis and molten iron. Insoluble in water and ethanol. 
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== Physical and Chemical Properties ==
  
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expansion coef = 5.0
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* Luster = metallic 
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* Soluble in fused alkalis and molten iron.
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* Insoluble in water and ethanol. 
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* Expansion coef = 5.0
  
 
{| class="wikitable"
 
{| class="wikitable"
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|-
 
|-
 
! scope="row"| Melting Point
 
! scope="row"| Melting Point
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| 2700 (dec)
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| 2700 C (dec)
 
|-
 
|-
 
! scope="row"| Density
 
! scope="row"| Density
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| 3.22-3.23
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| 3.22-3.23 g/ml
 
|-
 
|-
 
! scope="row"| Molecular Weight
 
! scope="row"| Molecular Weight
 
| mol. wt. = 40.0855
 
| mol. wt. = 40.0855
 
|}
 
|}
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== Hazards and Safety ==
 
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May produce a hazy glaze if residues are left on biscuit.
 
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Noncombustible.
 
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Potential carcinogen.  Contact may cause mechanical irritation. 
 
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Fisher Scientific: [https://fscimage.fishersci.com/msds/20700.htm MSDS]
 
  
 
== Comparisons ==
 
== Comparisons ==
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[[media:download_file_470.pdf|Natural and Simulated Diamonds]]
 
[[media:download_file_470.pdf|Natural and Simulated Diamonds]]
  
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== Resources and Citations ==
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== Authority ==
 
  
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 713
 
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 713
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* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 8636
 
* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 8636
  
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* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: silicon carbide" Encyclopædia Britannica [Accessed July 26, 2002].
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* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: silicon carbide" [Accessed July 26, 2002].
  
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* Wikipedia, the free encyclopedia, at http://www.wikipedia.com  Comment: http://en.wikipedia.org/wiki/Silicon_carbide (Accessed Sept. 17, 2005)
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* Wikipedia: http://en.wikipedia.org/wiki/Silicon_carbide (Accessed Sept. 17, 2005)
  
 
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
 
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993

Latest revision as of 12:52, 3 January 2023

Silicon carbide

Description

An extremely hard synthetic Abrasive. Silicon carbide was discovered in 1884 by E.G. Acheson and named Carborundum. He made it made by fusing Coke with Sand in Clay. Silicon carbide is resistant to thermal shock, thermal expansion, and high temperatures. The green to black powder is one of the hardest substances known to man. It is a good conductor of heat and electricity. Silicon carbide is used as an abrasive for polishing glass, granite, and bisque ware. It is also used in the manufacture of porcelain, emery paper, shoe soles, antiskid flooring, kiln shelves, and furnace linings. Moissanite is a jewel quality stone made from silicon carbide that was introduced in 1998 as a simulated diamond. Synthetic moissanite gemstones can be optically similar to diamonds, but can be distinguished because of their thermochromism (change in color with gradual heating), electrical conductivity and birefringence.

Synonyms and Related Terms

moissanite; Carborundum; Unirundum; Carbofrax; Urundum; Siliziumcarbid (Deut.); carbure de silicium; siliciumcarbide (Ned.); kiselkarbid (Sven.); Forever One; Forever Brilliant; Forever Classic; Amora

Raman (RASMIN)

SiliconcarbideRS.jpg

Risks

  • May produce a hazy glaze if residues are left on biscuit.
  • Noncombustible.
  • Potential carcinogen.
  • Contact may cause mechanical irritation.
  • Fisher Scientific: MSDS

Physical and Chemical Properties

  • Luster = metallic
  • Soluble in fused alkalis and molten iron.
  • Insoluble in water and ethanol.
  • Expansion coef = 5.0
Composition SiC
CAS 409-21-2
Mohs Hardness 9.0 - 9.5
Melting Point 2700 C (dec)
Density 3.22-3.23 g/ml
Molecular Weight mol. wt. = 40.0855

Comparisons

Properties of Common Abrasives

Natural and Simulated Diamonds

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 713
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8636
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
  • R.M.Organ, Design for Scientific Conservation of Antiquities, Smithsonian Institution, Washington DC, 1968

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