Mullite Ceramic

Ceramic Resistor Cores

Mullite ceramics are high temperature ceramic material with good mechanical strength, and excellent thermal shock properties due to its relatively low thermal expansion coefficient.  Mullite ceramic is a good lower cost alternative to dense alumina.  Typical applications include, but are not limited to, thermocouple applications, furnace muffle tubes, kiln rollers, sight tubes, rods and kiln furniture.

Mechanical, Electrical, Thermal and Physical Properties

Material Grade Mullite 
Physical Properties  
Water Absorption (%)Impervious: 0.00 – 0.00 
Density (g/cc)2.3 
ColorOff White 
Mechanical Properties
Flexural Strength (MPa/20 C)115 
Thermal Properties
C.O.T.E. (20-1000 C)5.1 x 10-6 
Safe Operating Temperature (C)1500 
Note: This information is for design guidance only.  Du-Co will not guarantee this information as absolute values.  Various geometries can affect properties