Mullite Ceramic Heating Protective Tube Description
Mullite (3Al2O3-2SiO2) is a refractory oxide material that exhibits low thermal expansion, good mechanical strength and stability at high temperatures. Mullite raw materials are easily available and inexpensive. It constitutes one of the primary oxide materials for both conventional and high-performance ceramics. Its processability permits a wide range and flexibility during manufacturing. It is well suited for casting special shapes and larger tubes.
Specifications for Mullite Ceramic Heating Protective Tubes
Chemical Composition
|
Al2O3
|
SiO2
|
TiO2
|
Fe2O3
|
CaO-MgO
|
K2O, Na2O and others
|
62.50%
|
34.50%
|
0.10%
|
0.80%
|
0.90%
|
1.30%
|
Mechanical
|
Units
|
SI/metric
|
(imperial)
|
Density
|
gm/cc (lb/ft³)
|
2.8
|
-175
|
Porosity
|
% (%)
|
0
|
0
|
Colour
|
-
|
cream-coloured
|
off-white
|
Bending Strength
|
MPa (lb/in²×10³)
|
180
|
-26
|
Elastic Module
|
GPa (lb/in²×10⁶)
|
151
|
-22
|
Shear Modulus
|
GPa (lb/in²×10⁶)
|
-
|
-
|
Elasticity Modulus
|
GPa (lb/in²×10⁶)
|
-
|
-
|
Compressive Strength
|
MPa (lb/in²×10³)
|
1 310
|
-190
|
Hardness
|
Kg/mm²
|
1 070
|
-
|
Fracture Toughness KIC
|
MPa·m1/2
|
2
|
-
|
Maximum Service Temperature
|
°C (°F)
|
1 650
|
-3 000
|
(unloaded)
|
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
|
Electrical
|
|
|
|
Dielectric Breakdown Strength
|
ac-kV/mm (Volt/Mil)
|
9.8
|
-245
|
Dielectric Constant
|
at 1 MHz
|
5.8
|
5.8
|
Dissipation Factor
|
at 1 kHz
|
0.003
|
0.003
|
Volume Resistivity
|
Ohm-cm
|
>10¹³
|
>10¹³
|
Applications for Mullite Ceramic Heating Protective Tubes
- Machining of components and tools
- Protective tubes
- Prototyping
- Production of ceramic small series
- Cores for coils
- Electrical insulators
- Templates for assembly
- Injectors, nozzles
- Vacuum parts
- Thermal insulators, inductive insulators
- Templates for soldering and welding
- Sensors
Mullite Ceramic Heating Protective Tube Packaging
Our Mullite Ceramic Heating Protective Tube is handled carefully during storage and transport in order to maintain the quality of our product in its original condition.