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Whitepapers / Properties of Refractory & Ceramic Materials
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Properties of Refractory and Ceramic Materials
MaterialMelting PointLimit of ApplicationHardness Moh’s ScaleDensitySpecific Heat (mean) 25 - 1,000 °CLinear Coefficient of ExpansionThermal ConductivityElectrical Resistivity
Units°C°C-g/cm3J/kg °C25 -_800 °C x 106 / °C@ °C W/m@ °C ohm/cm
Alumina (Al 2 O3 )2,0501,95093.961,0508.04 @ 1,31510 6 @ 1,100
Beryllia (8eO)2,5502,40093.02,1807.529 @ 1,0004 x 10 8 @ 600 8 x 1012 @ 850
Magnesia (MgO)2,8502,400663.601,17013.559 @ 1,1002 x 10 8 @850
Thoria (ThO2 )3,220 (approximately)2,70079.5 - 9.92909.53 @ 1,0002.6 x 10 7 @550 1.5 x 10 4 @ 1,200
Zironia (ZrO2)2,7002,4006.55.5 - 5.85907.53 @ 1,31510 6 @ 385 3.6 x 102 @ 1,200
Zircon (ZrO2 SiO2 )2,500 (approximately)1,8707.54.5 - 4.76304.54 @ 1,200High
Spinel (MgO Al 2O3 )2,1301,90083.61,0508.52 @ 1,3152.8 x 107 @ 500 2.0 x 105 @ 110
Mullite (3Al2 O3 2SiO2)1,8501,800-2.88405.04 @ 1,200105 - 103 @ 815 - 1370
Sillimanite (Al2O3 SiO2 )1,800 (approximately)1,8006.53.28405.02 @ 1,300104 - 105 @ 815 - 1,370
Silicon Carbide (SiC)2,200 - 2,700 (decomposes)1,400 - 1,700 (oxidizes)93.28404.513 @ 1,1007420 - 745 @ 1,000 - 1,500
Silicon Nitride (Si3 N4 )1,900 (sublimes)1400 in air 1,850 in inert93.181,050æ = 2.9 ß = 2.39.5 @ 1,2001013 @ 25 1010 @ 480
Carbon Graphite (C) varies3,600 (sublimes)-0.5 - 1.02.21,6002.2147 @ 50 63 @ 90010 - 3
Quartzite (SiO2 )1,4001,09072.651,1708.62.6 @ 1,2001014 @ 20 5 x 103 @ 1,300
Boron Carbide (B 4C)2,350540 in air 2,260 in inert9.32.52,0905.717.3 @ 800-
Boron Nitride (BN)2,721650 (oxidizes)22.11,5707.5 //0.77 -l26 @ 9001.7 x 10 13 @ 25 // 2.3 x 10 [email protected] 480 //
Titanium Carbide (TiC)3,1401,500 (oxidizes)9 - 106.51,0506.940 @ 1,100-
Tungsten Carbide2,780-9 - 1014.33006.343.3 @ 1,100-
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