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Materials

 

Accuflect®

Aluminum Nitride

Aluminum Oxide

Boron Nitride

Fused Silica

Macor®

Mullite

Sialon

Silicon Carbide

Silicon Nitride

Zirconium Oxide

 

 

Mullite Ceramic Properties

Mullite is a good, low cost refractory ceramic with a nominal composition of 3Al2O3•2SiO2. The raw materials for mullite are easily obtainable and are reasonably priced. It has excellent high temperature properties with improved thermal shock and thermal stress resistance owing to the low thermal expansion, good strength and interlocking grain structure.

.Key Mullite Properties

check Good thermal shock and stress resistance
check Low thermal conductivity
check Good strength
check Wear resistant
check Usable to high temperatures

Typical Mullite Uses

check Protection tubes
check Furnace liners
check Electrical insulators

Download Mullite datasheet

Mullite Engineering Properties*

Mullite — Cast and Extruded
Mechanical

Units of Measure

SI/Metric

(Imperial)

Density

gm/cc (lb/ft3)

2.8

(175)

Porosity

% (%)

0

0

Color

off-white

off-white

Flexural Strength

MPa (lb/in2x103)

180

(26)

Elastic Modulus

GPa (lb/in2x106)

151

(22)

Shear Modulus

GPa (lb/in2x106)

Bulk Modulus

GPa (lb/in2x106)

Poisson’s Ratio

Compressive Strength

MPa (lb/in2x103)

1310

(190)

Hardness

Kg/mm2

1070

Fracture Toughness KIC

MPa•m1/2

2

Maximum Use Temperature
(no load)

°C (°F)

1650

(3000)

Thermal

Thermal Conductivity

W/m•°K (BTU•in/ft2•hr•°F)

6

(42)

Coefficient of Thermal Expansion

10–6/°C (10–6/°F)

5.4

(3)

Specific Heat

J/Kg•°K (Btu/lb•°F)

Electrical

Dielectric Strength

ac-kv/mm (volts/mil)

9.8

(245)

Dielectric Constant

@ 1 MHz

5.8

5.8

Dissipation Factor

@ 1 kHz

0.003

0.003

Loss Tangent

Volume Resistivity

ohm•cm

>1013

>1013

*All properties are room temperature values except as noted.
The data presented is typical of commercially available mullite and is offered for comparative purposes only. The information is not to be interpreted as absolute material properties nor does it constitute a representation or warranty for which we assume legal liability. User shall determine suitability of the material for the intended use and assumes all risk and liability whatsoever in connection therewith.

See also: Ceramic Rod & Tube
See also: Ceramic Rod & Tube > Mullite Sizes

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