Technical Information

Properties of Refractory and Ceramic Materials

Material Melting Point Limit of Application Hardness Moh's Scale Density Specific
Heat (mean)
25-1000 °C
Linear Coefficient of expansion Thermal Conductivity Electrical Resistivity
UNITS °C °C   g/cm3 J/kg °C

25-800°C х

10-6 / °C

@°C

W/m °C

@°C

ohm/cm

Alumina
(Al203)
2050 1950 9 3.96 1050 8.0 [email protected] 106@1100
Beryllia
(Be0)
2550 2400 9 3.0 2180 7.5 [email protected] 4 x 108@600
8 x 1012@2100
Magnesia
(Mg0)
2850 2400 6 3.60 1170 13.5 [email protected] 2 x 108@850
Thoria
(Th02)
3220
approx
2700 7 9.5 - 9.9 290 9.5 [email protected] 2.6 x 107@550
1.5 x 104@1200
Zirconia
(Zr02)
2700 2400 6.5 5.5 - 5.8 590 7.5 [email protected] 106@385
3.6 x 104@1200
Zircon
(Zr02Si02)
2500
approx
1870 7.5 4.5 - 4.7 630 4.5 [email protected] High
Spinel
(Mg0 Al203)
2130 1900 8 3.60 1050 8.5 [email protected] 2.8 x 107@500
2.0 x 105@110
Mullite
(3Al2032Si02)
1850 1800 --- 2.8 840 5.0 [email protected] 105 - 103
@815-1370
Sillimanite
(Al203Si02)
1800
approx
1800 6.5 3.2 840 5.0 [email protected] 104 - 105
@815 - 1370
Silicon Carbide (SiC) 2200-2700
Decomposes
1400-1700
Oxidizes
9 3.2 840 4.5 [email protected] 7420 -745
@1000 - 1500
Silicon Nitride (Si3N4) 1900
Sublimes
1400 in air
1850 in inert
9 3.18 1050 α = 2.9
β = 2.3
[email protected] 1013@25
1010@480
Carbon Graphite (C) varies 3600
Sublimes
--- 0.5 - 1.0 2.2 1600 2.2 [email protected]
[email protected]
10-3
Quartizite
(Si02)
1400 1090 7 2.65 1170 8.6 [email protected] 1014@20
5 x 103@1300
Boron Carbide
(B4C)
2350 540 in air
2260 in inert
9.3 2.5 2090 5.7 [email protected] ---
Baron Nitride
(BN)
2721 650
Oxidizes
2 2.1 1570

7.5 //
0.77┴

[email protected] 1.7 x 1013@25//
2.3 x 1010@480//
TitaniumCarbide
(TiC)
3140 1500
Oxidizes
9 - 10 6.5 1050 6.9 [email protected] ---
TungstenCarbide 2780 --- 9 - 10 14.3 300 6.3 [email protected] ---
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