Mullite ceramic tubes is made of 60% Al2O3 +38% SiO2 material. Mullite ceramic tubes can be used up to temperatures to 1500ºC in both oxidizing and reduce atmospheres, which has better thermo conductivity and provides better temperature uniformity compared with quartz tubes, it has strong thermal shock stability and long working life.
1) Great mechanical strength
2) High softening temperature
3) Good resistance to thermal impact
4) Small thermal expansion coefficient
5) Good chill and abrupt heat properties
6) Resistance to acid and alkali corrosion
| Properties | Units | Value |
| Density, r | g/cm3 | 2.80 |
| Color | – | tan |
| Water Absorption | % @R.T. | 0.0 |
| Hardness | Moh’s | 8 |
| Hardness | knoop (kg/mm2) | 1450 |
| Compressive Strength | MPa @ R.T. | 551 |
| Tensile Strength | MPa @ R.T. | 103.5 |
| Modulus of Elasticity (Young’s Mod.) |
GPa | 150 |
| Flexural Strength (MOR) | MPa @ R.T. | 170 |
| Fracture Toughness, KIc | MPa x m1/2 | 2.0 |
| Max. Use Temperature (* denotes inert atm.) |
ºC | 1700 |
| Thermal Shock Resistance | DT (ºC) | 300 |
| Thermal Conductivity | W/m-K @ R.T. | 3.5 |
| Coefficient of Linear Thermal Expansion, al | mm/m-ºC (~25ºC through ±1000ºC) | 5.3 |
| Specific Heat, cp | cal/g-ºC @ R.T. | 0.23 |
| Dielectric Constant | 1MHz @ R.T. | 6.0 |
| Dielectric Strength | kV/mm | 9.8 |
| Electrical Resistivity | Wcm @ R.T. | 1013 |
Machining of components and toolings
– Protection tubes
– Realization of prototypes
– Manufacturing of small ceramic series
– Coil cores
– Electrical insulator
– Template of assembly
– Injectors, nozzles
– Vacuum parts
– Thermal insulators, inductive insulators
– Template of brazing and welding
– Sensors
Our mullite ceramic tubes are exported to USA, Canada, Europe, and South America and Southeast Asia.
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