Mullite is an excellent material due to its high temperature stability, strength and creep resistance. It is similar to Cordierite, although it is not as good an insulator and has a higher coefficient of thermal expansion. It is commonly used in heater exchange parts and electrical insulators.
General | |||
Property | ASTM Method | Units | Mullite |
Color | – | – | Gray – Tan |
Water Absorption | C 20-97 | % | 0 |
Mechanical | |||
Property | ASTM Method | Units | Mullite |
Density | C 20-97 | g/cc | 3.00 |
Hardness | Vickers 500 gm | GPa (kg/mm | 10 (1000) |
Flexural Strength (MOR) (3 point) @ RTº | F417-87 | MPa (psi x 103) | 206 (30) |
Compressive Strength @ RTº | – | MPa (psi x 103) | 1034 (150) |
Thermal | |||
Property | ASTM Method | Units | Mullite |
C.T.E., 25 – 100°C | C 372-96 | x10-6/°C | 3.6 |
C.T.E., 25 – 600°C | C 372-96 | x10-6/°C | 4.8 |
Thermal Conductivity @ RTº | C 408 | W/m-K | 4 |
Max Use Temperature (Non-Loading)
(at high strength) |
– | Celsius (°C) | 1700 |
GROUP | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
FEATURE OF COMPOSITION | Zr02 – 95% | ZrSi04 – 50% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
APPLICATION RANGE | High mechanical strength, exceptional wear resistance, good resistance to thermal shock. | Good refractoriness and good thermal shock, resistance, suited for L.V. circuit breaker. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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