Components for high performance

Automotive engineering
– Lighting systems

AUTOMOTIVE ENGINEERING // FLOW CONTROL IN VEHICLE MANUFACTURING // BODY CONSTRUCTION // COMBUSTION ENGINE // ELECTROMOBILITY // FILLING LEVEL MEASUREMENT // EXHAUST TRAIN // DRIVE // BRAKE SYSTEM // DISTANCE SENSOR // ABS MODULATOR // LIGHTING SYSTEMS // ELECTRONIC CIRCUITS // LIGHTWEIGHT ENGINE CONSTRUCTION // VEHICLE ARMOURING

Ceramic components are used in the lighting technology of motor vehicles in positions with generally high requirements for the following technical properties:

  • Static and dynamic load capacity
  • Electrical insulation
  • Thermal stability
  • Thermal shock resistance
  • Thermal conductivity
  • Thermal expansion
  • Corrosion resistance
  • Shape stability
  • Geometric precision
  • Topographic precision
  • Suitability for thin and thick film technology

Ceramic materials that have proven efficient in application and have met such requirements reliably over long periods of time are Al2O3 and AlN. Selected key properties are listed in the following.

  • Purity: >95 %
  • Density: >98 % of the theoretical value
  • Mean bending strength: >300 MPa
  • Mean compressive strength: >2 000 MPa
  • Thermal stability: >1 000 °C
  • Thermal conductivity: >180 W/m/K
  • High thermal shock resistance
  • Linear thermal expansion coefficient:
    • Al2O3: 5.5 ppm/K (20 – 100 °C), 8.0 ppm/K (20 – 1000 °C)
    • AlN: 3.5 ppm/K (20 – 250 °C), 5.5 ppm/K (20 – 1000 °C)
  • High corrosion resistance
  • Specific electrical resistance
    • Al2O3: >1014 Ω*cm
    • AlN: >1012 Ω*cm
  • Geometric precision to the tolerance range of 0.001 mm

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