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Steatite Ker 220 (MgSiO₄) beads
2.6 g/cm³ at 20 °C
open porosity, max
120 MPa at 20 °C
Coefficient of thermal expansionα
7E-6 - 9E-6 1/K at 100 °C
Max service temperatureTmax
1.5 - 2 W/(m·K) at 100 °C
Steatite fish spine beads are used for interlocking insulation for wires, allowing flexibility and providing continuous electrical insulation, even at very high temperatures.
The key features are: Withstand very high temperatures up to 1200 °C (2192 F), abrasion resistant material
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This material data has been provided by Goodfellow.