Ceramic Properties Tables
Ferro-Ceramic Grinding Inc. machines over 15 different materials
Mullite
Mullite PropertiesMullite is an excellent structural material due to its high temperature stability, strength and creep resistance.
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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.) |
ºC
|
No load cond.
|
1700
|
Thermal Shock Resistance
|
DT (ºC)
|
Quenching
|
300
|
Thermal Conductivity
|
W/m-K @ R.T.
|
ASTM C408
|
3.5
|
Coefficient of Linear Thermal Expansion, al
|
mm/m-ºC (~25ºC
through ±1000ºC)
|
ASTM C372
|
5.3
|
Specific Heat, cp
|
cal/g-ºC @ 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.