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STEATITE CERAMICS
IS A VERY GOOD ELECTRICAL INSULATOR

STEATITE

 

Based on natural raw materials, steatite consists mainly of soapstone (magnesium silicate). It has high temperature resistance and dielectric strength, making it suitable for use in electrical engineering, for example as an insulating material. The good workability and low shrinkage in combination with good mechanical strength complete this material.

Manufacturing and Properties

Steatite is a silicate ceramic material based on soapstone with a proportion of 75 - 90%.
In addition to soapstone, clay and flux are also included.
Typical steatite materials have the composition 58 - 65% SiO2, 26 - 32% MgO, 3 - 6% Al2O3, 1.3% Na2O (at C 220), or 7% BaO (at C 221).
The glass phase accounts for 25-45%. The crystalline part consists of protoenstatite.

The mechanical strength values can be increased by adding zirconium oxide.

The typical shaping processes are dry pressing, extrusion, ceramic injection molding, slip casting and wet pressing.

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The benefits of steatite

  • Very good dielectric strength

  • non-tracking

  • Temperature resistance and dimensional stability up to 1000 °C

  • High mechanical strength

  • Non-flammable

  • aging resistant

  • Resistant to UV radiation

STEATITE MIXTURES

Steatite C221 

  • Mainly magnesium silicate

  • Material structure dense

  • Good mechanical properties

  • High volume resistance up to 1000°C

  • Small loss factor

Steatite porous C230  

  • Mainly magnesium silicate

  • Material structure porous

  • Low mechanical strength

  • Editable with tools    

 Cordierite C410  

  • magnesium aluminum silicate

  • Material structure dense

  • Great resistance to temperature changes

  • Very low linear expansion    

Cordierite porous C520  

  • magnesium aluminum silicate

  • Material structure porous

  • Low mechanical strength

  • Great resistance to temperature changes

  • Low linear expansion    

Mullite C620  

  • aluminum silicate

  • approx. 70% Al2O3

  • Material structure dense

PROPERTIES STEATITE

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