Steatite

Steatite is a crystalline form of magnesium silicate. It is a low loss, low cost, relatively good strength insulating material which can function safely at temperatures up to 2,000° F. Applications include high frequency insulation, resistor cores and casings, and appliance insulators.

Steatite Properties
Units
ACT 300
ACT 500
Material
 
L-3 Grade Dense Steatite
L-5 Grade Dense Steatite
General Application
 
High Frequency & Appliance Insulators, Resistor Cores & Casings
Lower Electrical Loss, Higher Strength & Higher Cost than L-3 Steatite
Color (Fired)
 
White
Cream
Porosity
%
0-.05
0-.05
Density
gm/cm3
2.6
2.7
Flexural Strength
psi
20,000
20,000
Comprehensive Strength
psi
75,000
80,000
Tensile Strength
psi
8,400
10,000
Linear Coefficient of Thermal Expansion
(cm/cm/°C)
25-300°C
25-700°C
8.1 X 10-6
8.5 X 10-6
7.2 X 10-6
8.1 X 10-6
Dielecctric Constant at 25°C
1 MH
10 MH
5.8
5.7
6.2
6.5
Dielectric Strength
Volt/mil
225
230
Te Value
°F
°C
806
430
1382
750
Thermal Conductivity at 25°C
cal/sec/cm2/cm/°C
0.006
0.006
Thermal Shock
 
Fair
Fair
Safe Use
Temperature
°F
°C
2200
1200
2300
1260
Above values are test specimen results and actual shapes may vary in value.
We can work with other formulations as well.

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