Oxide Ceramics – Silicate Ceramics

The Traditional Ceramic Materials

Early developments in the field of technical ceramics began with the use of silicate ceramics for electrical insulation. Silicate ceramics are manufactured for the most part from natural raw materials.

Worth knowing:

Properties of Silicate Ceramics

  • Very good electrical insulation (1x1010 to 1x1013 Ωcm)
  • Minimal to moderate linear expansion
    (0.4x10-6K-1 to 6x10-6K-1)
  • Excellent thermal shock resistance (250 to 610 K)
  • Low thermal conductivity (2 to 4 W/mK)
  • Flexural strengths from 80 to 180 MPa

Very different types of multiphase ceramics can be produced with different properties by varying the type and quantity of raw materials. Silicate ceramic materials include:

  • Porcelains: Alkali – aluminum silicates (Typ C140)
  • Steatites: Magnesium silicates
    (Type C221, 230)
  • Cordierites: Alkaline earth – silizium silicates
    (Type C410, C520, C530)
  • Mullites: Alumina-silicon oxide compositions
    (Type C610, C620/C780)

Silicate ceramic components are used in electronics and electrical engineering and act as electrical insulation in fuses, circuit breakers, thermostats and in lighting technology. The ability of silicate ceramic materials to provide thermal insulation is also utilized in heating, environmental and thermal engineering applications. Porous components are produced for the emission of fragrances and insecticides, as carriers for catalysts or for various applications in laboratories. Precision components for applications in measurement technology and products for laboratory use and mixed media complete CeramTec’s range of silicate ceramic products.