Cordierite Ceramic & Mullite Ceramic

Our cordierite (2MgO·2Al₂O₃·5SiO₂) ceramic heater bobbins are engineered for extreme temperature stability, low thermal expansion, and superior electrical insulation in heating applications. Fully customizable designs available for OEM integration.

Key Technical Specifications

✅ Material Composition:

55-60% SiO₂, 20-25% Al₂O₃, 12-15% MgO

<0.5% Fe₂O₃ (low iron formulation)

✅ Thermal Properties:

Continuous Service Temp: 1,350°C (2,462°F)

Thermal Shock Resistance: ΔT>800°C (water quenching)

Thermal Expansion: 1.5-2.5×10⁻⁶/K (25-800°C)

✅ Electrical Properties:

Dielectric Strength: 8-12 kV/mm

Volume Resistivity: >10¹² Ω·cm (at 500°C)

✅ Mechanical Properties:

Flexural Strength: 80-120 MPa

Hardness: 7-8 Mohs

✅ Standard Features:

Wire grooves: 0.5-5mm width (±0.05mm)

Terminal slots: Custom configurations

Surface finish: As-fired (Ra 0.5-1.0µm) or ground

✅ Custom Options:

Integrated thermocouple slots

Multi-channel designs

Branding/laser marking

Industry Applications

1. Industrial Heating Systems

Resistance wire supports – For 1,200°C furnace elements

Infrared heater cores – Rapid thermal cycling capable

2. Automotive Electronics

Glow plug insulators – Diesel cold start systems

Seat heater components – Vibration resistant

3. Appliance Manufacturing

Toaster/heater coils – UL/CE compliant

Hair dryer elements – Moisture resistant

4. Semiconductor Equipment

Wafer heating elements – Low particulate generation

Vacuum furnace fixtures – Outgassing <1×10⁻⁸ Torr

5. Energy Systems

Fuel cell preheaters – Thermal cycling stable

Battery thermal management – High dielectric strength

Competitive Advantages

✔ Zero Thermal Deformation – <0.1% dimensional change at 1,200°C

✔ Custom Geometry – ±0.1mm feature tolerance

✔ Electrical Safety – Withstands 15kV+ in humid environments

✔ Cost Efficiency – 3× lifespan vs. steatite ceramics