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|
Materials
|
Silicon Carbide
SIC |
Siliciumnitride
Si3N4 |
Boron Nitride
Grade A/Grade ZSBN |
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|
Properties
|
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| Density (g/cm3) |
2,5
|
3,93 / 3,72 / 3,65
|
6,01 / 5,60
|
1,75
|
3,2
|
3,20
|
1,9 / 2,9
|
| Hardness (kg/mm2) |
400
|
1800 / 1400 /1500
|
1400 / 1500
|
–
|
2.800
|
1600
|
– / –
|
| Bending Strength (kg/mm2) |
Poor
|
40 / 35 / 35
|
90 / 60
|
–
|
50
|
80
|
– / –
|
| Fracture Toughness (MPam ½) |
Poor
|
3,0 / 2,7 / 2,5
|
7,0 / 8,0
|
–
|
2,5
|
6,0
|
– / –
|
| Thermal Shock Resistance(DT) |
Good
|
200 / 200 / 200
|
250 / 400
|
Excellent
|
350
|
750
|
Excellent / –
|
| Working Temperature(°C) |
800
|
1500 / 1500 / 1400
|
800 / 1000
|
3000
|
1400
|
1100
|
850/1850
|
| Corrosion Resistance: Acid Alkali |
Good
Good |
Excellent / good
Excellent / good |
Good / Good
Good / Good |
Excellent |
Excellent |
Good
Good |
Excellent |
| Merit: | Machinable 0-poros Thermal and electrical insulator |
High Wear Resistance High Corrosion Resistance High Temperature Resistamce |
High Wear Resistance. High Toughness High thermal Insulator. |
High temperature strength Low surfacefriction Thermal and electrical conductor. |
Excellent hardness, wear- and corrosion-resistance High temperature strength. Thermal and electrical conductor. |
High Thermal Shock Resistance High temperature Strength High Wear Resistance. |
High tempereature Strenght in inert Atmosphere Thermal and electrical shock resistant. Thermal and electrical Conductor. |