4003G Datasheet, PDF (2/3 Pages) List of Unclassifed Manufacturers – Beryllium Oxide Ceramic

Beryllium Oxide
PROPERTY
TYPICAL VALUE 25°C
CHEMICAL
Be0 content
99.5% minimum
ELECTRICAL
Dielectric Constant
25°C (77°F)
6.5 (1MHz)
6.6 (10GHz)
Dissipation Factor
25°C (77°F)
.0004 (1MHz)
.0004 (10GHz)
Electrical Resistivity
25°C (77°F)
Dielectric Strength
(AC)
>10¹⁵ ohm-c m
22.8 x 10³ volts/mm
(.81mm) [580 volts/mil
(0.32")]
Density
PHYSICAL
2.85 g/cm³ (min)
177.93 Lb/ft³
Hardness
60 minimum
(Rockwel 45N)
Flexural Strength
25°C (77°F)
Modules of Elasticity
MECHANICAL
2.27 x 10⁸ Pa (min.)
(33,000 psi min.)
3.45 x 10¹¹ Pa (50 x
10⁶ psi)
Poisson's Ratio
0.26
Tensile Strength 25°C 1.52 x 10⁸Pa (22,000 psi
(77°F)
)
Compressive Strength 1.55 x 10⁹ Pa (25,000
25°C (77°F)
psi)
THERMAL
Coefficient of Thermal
Expansion
9.0 x 10^-6 /°C
5.0 x 10^-6 /°F
251.28 Wm^-1 °C^-1 (25°F)
[145.14 Btu/hr.ft °F]
Thermal Conductivity
(77°F)
186.44 Wm^-1 °C^-1 (100°F)
[106.86 Btu/hr.ft °F]
(212°F)
TEST METHOD
Spectograph Analysis
(100%- % by wt. of total
metallic impurity).
ASTM D150-70
ASTM D2520-70
ASTM D150
ASTM D2520
ASTM D150
ASTM D257-61
ASTM D149-84
ASTM C373-66
ASTM F77-671
ASTM E18-67
ASTM Mic robar 8025
ASTM D2442-70A3
ASTM D2442-70A4
ASTM D2442-70A4
ASTM 565-66T
ASTM C528
ASTM E-228
ASTM C372-56
ASTM C327-56
ASTM C408-82
ASTM C408-82