Automotive Engineering > Electronic circuits

Ceramic materials for electric and electronic component assemblies in motor vehicles are generally used in technically demanding positions. Properties in focus for such applications are listed in the following general overview:

  • Bending strength
  • Compressive strength
  • Fracture toughness
  • Modulus of elasticity
  • High-temperature strength
  • Thermal conductivity
  • Thermal expansion
  • Thermal shock resistance
  • Dielectric properties
  • Magnetic properties
  • Electrical insulation
  • Dimensional stability
  • Suitability for thin and thick film technology
  • Geometric precision
  • Topography
  • Realization of joining concepts by means of force, form-fit and substance-to-substance methods

Today in automotive engineering different oxide and non-oxide ceramic materials are used with technical properties that have been optimized to meet the specific requirements.

Examples are the following dense-sintered materials, which are listed with their main applications and in some cases with selected performance data:

  • Substrate materials
    • Al2O3
      • Degree of purity: >95 %
      • Specific electrical resistance: 1014 Ω*cm
      • Thermal conductivity: 30 W/m/K (20 °C)
      • Linear thermal expansion coefficient: 5.5 ppm/K (20 – 100 °C), 8.0 ppm/K (20 – 1000 °C)
    • AlN
      • Specific electrical resistance: 1012 Ω*cm
      • Thermal conductivity: >180 W/m/K
      • Linear thermal expansion coefficient: 3.5 ppm/K (20 – 250 °C), 5.5 ppm/K (20 - 1000 °C)
    • Soft magnetic ferrites
      • Materials with cubic spinel structure, e.g. on the basis of Ni-Zn or Mn-Zn
    • Capacitor materials
      • Materials with perovskite structure of BaTiO3 basis

Products

Products for the application
Electronic circuits

Circuit carrier

      Circuit boards

Transformers

      Soft magnets (ferrites)

Storage chokes

      Soft magnets (ferrites)

      Capacitors

      Coil forms

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