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.
|Color||-||-||gray - tan|
|Water Absorption||C 20-97||%||0|
|Elastic Modulus||C848||psi x106||26|
|Shear Modulus||C848||psi x106||10|
|C.T.E., 25 - 100°C||C372-96||x10-6/°C||3.6|
|C.T.E., 25 - 300°C||-||-||4.1|
|C.T.E., 25 - 600°C||-||-||4.8|
|Thermal Conductivity, 25°C||C408||W/m-K||4|
|Max Use Temperature (Non-Loading)||-||°F||3100|
|Max Use Temperature (Non-Loading)||-||°C||1700|
|Dielectric Loss @ 1MHZ||D150-98||-||0.003|
|D257||ohms-cm||>1E + 14|
Note: The information in this data sheet is for design guidance only. STC does not warrant this data as absolute values. Forming methods and specific geometry could affect properties. Slight adjustments can be made to some of the properties to accommodate specific customer requirements. Most of the dense materials in the table are resistant to mechanical erosion and chemical attack. STC has performed ASTM testing qualification for certain compositions, in accordance with ASTM D2442. Please consult our technical staff for appropriate material and specifc test results.
Note: In addition to the above compositions, STC offers a wide range of alternative materials. Please contact one of our applications engineers for material requirements that may not be shown above.