> Material
ALUMINA
PROPERTY
ALUMINA
COMPOSITION
UNIT
DGA-850
DGA-960
DGA-975
DGA-980
DGA-995
AL
2
O
3
AL
2
O
3
%
85
96
97.5
98
99.7
TENSILE
Kpsi
18
30
30
30
32
FLEXURAL
Kpsi
45
55
55
55
60
COMPRESSIVE
Kpsi
250
300
300
300
330
DENSITY
g/cc
3.4
3.67
3.72
3.8
3.9
POROSITY
-
0
0
0
0
0
COLOR
-
WHITE
WHITE
WHITE
WHITE
IVORY
HARDNESS
MOHÕS SCALE
9
9
9
9
9
THERMAL CONTDUCT
cal/cm
2
cm/sec/c¡
0.042
0.049
0.05
0.052
0.055
C.O.T.E.
In / In¡C (x10
7
)
67
75
76
77
78
MAX WK TEMP
-
1350
1600
1650
1650
1700
DIELECTRIC STRENGTH
D.C. Volts Mil @ 0.100" Thick
190
230
230
240
250
VOLUME RESISTIVITY
Ohm-cm (x10
12
)
0.02
2
3.1
3.2
3.5
DIELECTRIC CONSTANT
-
7.6
9
9.4
9.6
9.7
DISSIPATION FACTOR
-
0.0006
0.0003
0.0002
0.0001
0.0001
LOSS FACTOR
-
0.006
0.028
0.013
0.011
0.009
