1. Silicon carbide
Shih PingEn
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2. INDEX
 Production.
 Properties.
 Applications.
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3. Production
 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
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4. Production
 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
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5. Properties
 Low density.
 High strength.
 Low thermal expansion.
 High thermal conductivity.
 High hardness.
 High elastic modulus.
 Excellent thermal shock resistance.
 Superior chemical inertness.
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6. Properties
 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.
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7. Applications
 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:
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8. Examples
SiC ceramic.
SiC tubes.
SiC ring.
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9. Applications
 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
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10. Applications
- Ultrafast switching frequency:
- High performance PFC(Power Factor
Compensation)-inverter for air-conditioning.
- High performance frequency variable motor drives.
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11. Applications
- High Thermal properties
(3x of Si aprox):
- Solar inverter less of power losses.
- Chip size reduction …economical benefices.
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12. Applications
- High Thermal properties
(3x of Si aprox):
- Solar inverter less of power losses.
- Chip size reduction …economical benefices.
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13. Applications
- 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
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14. Bibliography
 http://www.i-micronews.com
 http://www.eeweb.com
 http://www.articlesbase.com
 http://www.wikipedia.com
 http://semisouth.com/archives/155
 http://powerelectronics.com
 http://www.cree.com/products/pdf/CMF20120D.p
df
 http://accuratus.com/silicar
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15. END
Thank you for your time!
SPEed Works.
Have a good time!
For questions send an e-mail to pinshi@etsid.upv.es
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16. END
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18. END
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