Alumina Content

80-85%

90-96%

> 99.5%

99%

General Application

Lower Cost Electrical & Mechanical

High Strength, Wear Resistant, Electronic, Insulating, Mechanical, Structural & Metalizing

Extremely High Purity, Temperature & Strength; Excellent Corrosion & Wear Resistance

Porous, Easily Degassed & Machinable

Porosity

%

0-.05

0-.05

0-.05

Variable

Density

gm/cm3

3.45-3.50

3.55-3.75

3.75-3.95

2.4

Flexural Strength

kpsi

35.0-40.0

40.0-50.0

50.0-55.0

-

Comprehensive Strength

kpsi

260.0

> 300.0

> 300.0

-

Tensile Strength

kpsi

15.0-20.0

20.0-28.0

20.0-28.0

-

Linear Coefficient of Thermal Expansion

(cm/cm/°C)25-300°C25-700°C

5.9X10-66.5X10-6

6.3X10-67.0X10-6

6.5X10-67.5X10-6

6.5X10-67.5X10-6

Dielecctric Constant at 25°C

1 MH10 MH

8.5-8.98.4-8.8

9.2-9.89.0-9.6

9.5-9.99.3-9.7

-

Dielectric Strength

Volt/mil

200

225

225

-

Te Value

°F°C

1472800

> 1832> 1000

> 1832> 1000

> 1832> 1000

Thermal Conductivity at 25°C

cal/sec/cm2/cm/°C

.03-.04

.04-.06

.07-.08

-

Thermal Shock

Good

Good

Good

Good

Safe UseTemperature

°F°C

25501400

3000-31001650-1700

32751800

32751800