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MC2251 Mullite Tube, Silicate Ceramic Tube

  • Catalog No. MC2251
  • Color Off-white
  • Shape Heater Plate
  • Thermal Conductivity 6 W/m·K
  • Dielectric Strength 9.8 ac-kv/mm

Mullite Tube Description

Mullite tube is made of silicate ceramic mullite. The main crystal phase of the mullite tube is 3Al2O3·2SiO2. It has a low thermal expansion, good mechanical strength, and resilience at elevated temperatures.

Raw mullite materials are easily obtained and reasonably priced. It is certainly one of the most important oxide materials for both conventional and advanced ceramics. Its workability allows an extensive range and flexibility in fabrication. It is well suited for the casting of special shapes and larger tubes.

Advanced Ceramic Materials (ACM) is a trusted supplier of mullite ceramic tubes.

Mullite Tube Specifications

Chemistry Content of Mullite Tube
Al2O3 SiO2 TiO2 Fe2O3 CaO·MgO K2ONa2O and others
62.50% 34.50% 0.10% 0.80% 0.90% 1.30%


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)
Compressive Strength MPa (lb/in2x103) 1310 -190
Hardness Kg/mm2 1070
Fracture Toughness KIC MPa•m1/2 2
Maximum Use Temperature °C (°F) 1650 -3000
(no load)
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
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
Volume Resistivity ohm•cm >1013 >1013


Mullite Tube Applications

Mullite ceramic tubes have a wide variety of applications:

- 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

Related Documents
Advanced Ceramic Materials Brochure
Technical brochure for Advanced Ceramic Materials, all grades. Revision March 2023.
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