SiC

2.  There are two types of ceramics.
1. Technical ceramics.
ex..TiB2,alumina,bioglass,etc.
2. Non technical ceramics.
ex..cement,marble,slate,etc.

3. DISCOVERY
In 1891 Edward G Acheson produced a small amount of Silicon Carbide
while conducting experiments with clay & carbon.

4. He passed strong electric
current from carbon electrode
through a mixture of clay &
coke in a iron bowl, which
served as second electrode.
He found formula to be SiC.
Silicon carbide (SiC) is a
chemical compound of silicon
and it is also known as

5. In 1893, Henri Moissan
discovered the very rare
naturally-occurring SiC mineral
while examining rock samples
found in the Canyon Diablo
meteorite in Arizona. The
mineral was named moissanite
in his honor.

6. PROPERTIES
Molecular formula CSi
Molar mass 40.10 g·mol
−1
Appearance Colorless crystals
Density 3.21 g·cm
−3
(all polytypes)
[1]
Melting point 2,730 °C (4,950 °F; 3,000 K)
(decomposes)

7. Properties of major SiC polytypes[2][22]
Polytype 3C (β) 4H 6H (α)
Crystal structure
Zinc blende
(cubic)
Hexagonal Hexagonal
Space group T2
d-F43m C4
6v-P63mc C4
6v-P63mc
Pearson symbol cF8 hP8 hP12
Lattice constants
(Å)
4.3596 3.0730; 10.053 3.0810; 15.12
Density (g/cm3) 3.21 3.21 3.21
Bandgap (eV) 2.36 3.23 3.05
Bulk
modulus (GPa)
250 220 220
Thermal
conductivity (W
cm−1K−1)@ 300K
(see [29] for temp.
dependence)
3.6 3.7 4.9

8.  Steel & energy
 Automotives
 Industrial sector
 Aerospace
 Military & Defense
 Medical & Health
 Electronics & semiconductors
 Others

9. Abrasive & cutting tools.
Armors.
Automobiles

10. Steel production.
Carborundum printmaking.
Graphene production
Heating elements
LEDs
Electric systems

11. Electronic circuit elements
Thin filament pyrometry
Jewelry