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TYPICAL PROPERTIES OF GLASS INSULATION

PROPERTIES

MIN

MAX

E L E C T R I C A L

Dielectric strength, kV/mil

7.8

12.0

Electrical Resistivity,

log10 Ohm x cm

25 ºC

-

15.0

250 ºC

6.5

12.9

350 ºC

5

11

 Dielectric  constant 

@ 1 MHz and  20 ºC

4,6

7.4

@ 1 MHz and 300 ºC

-

5.9

@ 10 GHz and 20 ºC

3.8

6.7

Loss Factor

@   1 MHz and 20 ºC

0.0019

0,065

@ 1 MHz and 300 ºC

0.016

0.057

@ 10 GHz and 20 ºC

0.03

0.114

Dissipation Factor

@ 1 MHz and 20 ºC

0.0046

0.009

@ 1 MHz and 300 ºC

-

0.013

@ 10 GHz and 20 ºC

0.0085

0.017

Power Factor @ 1 MHz and 20 ºC, %

0.15

0.90

 

T H E R M A L 

Strain point,  ºC   (1)

390

740

Thermal Expansion, x 1 / 10 -7( 0 – 300 º C) cm /cm/ ºC 35

93

Thermal Conductivity, cal/sec x cm x ºC .002 - .003
Specific heat @ 25 ºC, cal/g 700 820

M E C H A N I C A L

Young’s Modules x 103    kg/mm2 6.4 9.0
Knoop Hardness, KHN100