Click on table links below to see properties
-
-
-
 

 

Ferro-Ceramic Grinding Inc. machines over 15 different materials

Mullite

Mullite Properties
Mullite Mullite is an excellent structural material due to its high temperature stability, strength and creep resistance.

Mullite Properties

Mullite

Mullite is an excellent structural material due to its high temperature stability, strength and creep resistance. It has a low dielectric constant and high electrical insulation capabilities.

Typical applications include Kiln Furniture, furnace center tube, heat exchange parts, heat insulation parts, and rollers.

  

Properties
Units
Test
Value
Physical
Chemical Formula
-
-
3Al2O3-SiO2
Density, r
g/cm3
ASTM C20
2.80
Color
-
-
tan
Crystal Structure
-
-
orthorhombic
Water Absorption
% @R.T.
ASTM C373
0.0
Hardness
Moh's
-
8
Hardness
knoop (kg/mm2)
Knoop 100g
1450
Mechanical
Compressive Strength
MPa @ R.T.
ASTM C773
551
Tensile Strength
MPa @ R.T.
ACMA Test #4
103.5
Modulus of Elasticity
(Young's Mod.)
GPa
ASTM C848
150
Flexural Strength (MOR)
MPa @ R.T.
ASTM F417
170
Poisson's Ratio, u
-
ASTM C818
0.25
Fracture Toughness, KIc
MPa x m1/2
Notched Beam Test
2.0
Thermal
Max. Use Temperature
(* denotes inert atm.)
șC
No load cond.
1700
Thermal Shock Resistance
DT (șC)
Quenching
300
Thermal Conductivity
W/m-K @ R.T.
ASTM C408
3.5
Coefficient of Linear Thermal Expansion, al
mm/m-șC (~25șC through ±1000șC)
ASTM C372
5.3
Specific Heat, cp
cal/g-șC @ R.T.
ASTM C351
0.23
Electrical
Dielectric Constant
1MHz @ R.T.
ASTM D150
6.0
Dielectric Strength
kV/mm
ASTM D116
9.8
Electrical Resistivity
Wcm @ R.T.
ASTM D1829
1013
 
 
*Although we have no reason to doubt the accuracy of the data presented, Ferro-Ceramic Grinding Inc. offers this information for comparison only, and disclaims any and all liability from error, omissions or inaccuracies, such that it does not constitute a warranty or representation for which we shall assume legal responsibility.