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Silicon carbide
31.05.20121
INDEX
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Production.
Properties.
Applications.
Production
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1893: Henri Moissan discovered silicon carbide
The mineral was named moissanite in his honor
Synthetic silicon carbide: Acheson graphite electric resistance furnace with high temperature 1700 - 2500°C
Production
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The material formed in the Acheson furnace varies in purity
Silicon carbide exists in about 250 crystalline forms
The most common is Alpha silicon carbide. It is formed at temperatures > 1700°C
Properties
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Low density.High strength.Low thermal expansion.High thermal conductivity.High hardness.High elastic modulus.Excellent thermal shock resistance.Superior chemical inertness.
Properties
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Apperance: Gray, Black sometimes colourless.
Flexural strength (MPa):550; gray iron 350.
Hardness (Mohs): 9.6; diamond 10.
Density (g/cm³): 3.21; diamond 3.5.
Melting point(ºC): 2730; Si 1410°C.
Specific heat(J/KgK): 750; Si 700; Ge 320.
Applications
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Such as:
- Automobile parts: Disc brake, sensitive sensor, etc.
- Power plants: nuclear fuel particle coatings, nuclear fuel cladding.
- Steel production and graphene production.
- Ballistic vest.
- Jewelry.
- Cutting tools.
-…(s,c). However, what is really interesting is its application on the field of
the power electronic:
Examples
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SiC ceramic.
SiC tubes.
SiC ring.
Applications
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Schottky diodes, tryristors, MOSFETs, IGBT, etc.
Characteristics:
- Ultrafast.
- High Thermal properties.
- High Voltage work condition.
- Better system efficiency.
First Commercial Silicon Carbide Power MOSFET
Infineon’s 3G SiC Schottky diodes, in both DPAK and TO-220 package
Applications
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- Ultrafast switching frequency:
- High performance PFC(Power Factor
Compensation)-inverter for air-conditioning.
- High performance frequency variable motor drives.
Applications
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- High Thermal properties (3x of Si aprox):
- Solar inverter less of power losses.
- Chip size reduction …economical benefices.
Applications
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- High Thermal properties (3x of Si aprox):
- Solar inverter less of power losses.
- Chip size reduction …economical benefices.
Applications
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- High Voltage work condition:
Breakdown V aprox. 10x of Si.Motor control and power supplies:
-Industrial motor drive. 600~1200 V
- Automotive 600~1200 V
- Elevator, automation. 600~1700 V
- Power supply Alternative sources. 600~1200 V
- Electric railway system. 1200~6500V
- Power network. >10kV
Bibliography
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http://www.i-micronews.comhttp://www.eeweb.comhttp://www.articlesbase.comhttp://www.wikipedia.comhttp://semisouth.com/archives/155http://powerelectronics.comhttp://
www.cree.com/products/pdf/CMF20120D.pdfhttp://accuratus.com/silicar
END
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Thank you for your time!
SPEed Works.Have a good time!
For questions send an e-mail to [email protected]
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Sorry, but this already
the end.
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