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Ceramic Property Comparison

International Syalons offer a range of silicon nitride based sialon, alumina, zirconia and silicon carbide advanced ceramics. These materials will potentially meet your needs in many testing industrial and engineering environments.

In an effort to show how our materials offer a unique set of physical properties, the graphs below compare some properties of our various grades of Syalon, Aluminon, Zircalon and Sycarb with reaction bonded silicon nitride (RBSN) and mullite. (Comparative data comes from technical literature).

Modulus of Rupture

Room temperature modulus of rupture (MPa)

RBSN
180
Mullite
180
Aluminon 96 (Al2O3)
300
Aluminon 995 (Al2O3)
330
Aluminon 999 (Al2O3)
500
Sycarb 10 (SSiC)
450
Sycarb 20 (SiSiC)
420
Syalon 050
800
Syalon 101
945
Syalon 110
500
Syalon 201
825
Syalon 501
825
Zircalon 5 (ZrO2)
1000
Zircalon 10 (ZrO2)
1200
Zircalon 20 (ZrO2)
500

Modulus of rupture at 1000 °C (MPa)

Aluminon 96 (Al2O3)
200
Aluminon 995 (Al2O3)
250
Aluminon 999 (Al2O3)
300
Sycarb 10 (SSiC)
450
Sycarb 20 (SiSiC)
420
Syalon 050
750
Syalon 101
700
Syalon 110
400
Syalon 201
750

Note RBSN, mullite, Syalon 501 and Zirconia could not be tested at 1000 °C.

Hardness

Room temperature hardness (Hv50 Kg/mm2)

RBSN
800
Mullite
1100
Aluminon 96 (Al2O3)
1600
Aluminon 995 (Al2O3)
1600
Aluminon 999 (Al2O3)
1800
Sycarb 10 (SSiC)
2600
Sycarb 20 (SiSiC)
2400
Syalon 050
2020
Syalon 101
1500
Syalon 110
1200
Syalon 201
1650
Syalon 501
1350
Zircalon 5 (ZrO2)
1350
Zircalon 10 (ZrO2)
1350
Zircalon 20 (ZrO2)
1200

Fracture Toughness K1C

Fracture Toughness K1C (MPa m½)

RBSN
2.5
Mullite
2.0
Aluminon 96 (Al2O3)
3.5
Aluminon 995 (Al2O3)
4.0
Aluminon 999 (Al2O3)
4.5
Sycarb 10 (SSiC)
4.0
Sycarb 20 (SiSiC)
4.0
Syalon 050
6.5
Syalon 101
7.7
Syalon 110
3.5
Syalon 201
4.5
Syalon 501
5.7
Zircalon 5 (ZrO2)
8.0
Zircalon 10 (ZrO2)
10.0
Zircalon 20 (ZrO2)
7.0

Thermal Shock Resistance

Thermal Shock Resistance (ΔT°C quenched in cold water)

RBSN
300
Mullite
300
Aluminon 96 (Al2O3)
200
Aluminon 995 (Al2O3)
200
Aluminon 999 (Al2O3)
220
Sycarb 10 (SSiC)
350
Sycarb 20 (SiSiC)
400
Syalon 050
600
Syalon 101
900
Syalon 110
800
Syalon 201
600
Syalon 501
400
Zircalon 5 (ZrO2)
250
Zircalon 10 (ZrO2)
250
Zircalon 20 (ZrO2)
350

Thermal Conductivity

Room Temperature Thermal Conductivity (W/(mK))

RBSN
14
Mullite
6
Aluminon 96 (Al2O3)
20
Aluminon 995 (Al2O3)
30
Aluminon 999 (Al2O3)
30
Sycarb 10 (SSiC)
150
Sycarb 20 (SiSiC)
110
Syalon 050
20
Syalon 101
28
Syalon 110
27
Syalon 201
21
Syalon 501
19
Zircalon 5 (ZrO2)
2
Zircalon 10 (ZrO2)
2
Zircalon 20 (ZrO2)
2.5

Thermal Expansion Coefficient

Room Temperature Thermal Expansion Coefficient (X10-6K-1)

RBSN
3.0
Mullite
5.3
Aluminon 96 (Al2O3)
7.0
Aluminon 995 (Al2O3)
7.8
Aluminon 999 (Al2O3)
8.5
Sycarb 10 (SSiC)
4.4
Sycarb 20 (SiSiC)
4.3
Syalon 050
3.2
Syalon 101
3.0
Syalon 110
3.0
Syalon 201
3.0
Syalon 501
5.6
Zircalon 5 (ZrO2)
10.0
Zircalon 10 (ZrO2)
10.0
Zircalon 20 (ZrO2)
11.0

Density

Density (g/cc)

RBSN
2.50
Mullite
2.80
Aluminon 96 (Al2O3)
3.75
Aluminon 995 (Al2O3)
3.89
Aluminon 999 (Al2O3)
3.95
Sycarb 10 (SSiC)
3.15
Sycarb 20 (SiSiC)
3.10
Syalon 050
3.23
Syalon 101
3.24
Syalon 110
2.65
Syalon 201
3.24
Syalon 501
4.01
Zircalon 5 (ZrO2)
6.13
Zircalon 10 (ZrO2)
6.05
Zircalon 20 (ZrO2)
5.70

Please see our materials section for more information on the fine silicon nitride based sialon, alumina, zirconia and silicon carbide ceramics we manufacture.

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