Steatite

Steatite is a Magnesium Silicate material.  It is formed using standard ceramic processing methods and can readily be machined or net shape sintered into a variety of forms.  The material is lower in cost than Alumina but offers reduced mechanical properties.  However Steatite has very good electrical resistance properties, which are retained at high temperatures, along with moderate mechanical strength and temperature resistance.  It has been used in electrical insulation for many years in both large-scale electrical systems and electronic and domestic appliances.

 

COMPOSITION
UNIT
L-3
L-4
L-5
TENSILE
Kpsi
8.5
10
9.1
FLEXURAL
Kpsi
1845
21
19
COMPRESSIVE
Kpsi
80
90
80
DENSITY
g/cc
2.5
2.7
2.7
POROSITY
-
0
0
0
COLOR
-
TAN
TAN
TAN
HARDNESS
MOH'S SCALE
7.5
7.5
7.5
THERMAL CONTDUCT
cal/cm2 cm/sec/c°
0.06
0.06
0.06
C.O.T.E.
In / In°C  (x107)
80
82
69
MAX WK TEMP
°C
1000
1000
950
DIELECTRIC STRENGTH
D.C. Volts Mil @ 0.100" Thick
225
220
230
VOLUME RESISTIVITY
Ohm-cm (x1012)
2.1
9.1
1
DIELECTRIC CONSTANT
-
5.9
5.9
6.3
DISSIPATION FACTOR
-
0.0035
0.0019
0.0008
LOSS FACTOR
-
0.021
0.011
0.05
 
 

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