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Electrical Properties

Mica excels in electrical properties. Mica has the unique combination of great dielectric strength, uniform dielectric constant and capacitance stability, low power loss (high Q factor), high electrical resistivity and low temperature CO-efficient and capacitance. It is noted for its resistance to arc and corona discharge with no permanent injury, and has little or no effect when exposed to electronic radiation dosages up to 1018 nvt. Thus maintains a perfect dielectric material when exposed to the oxidizing action of electrical discharges either on the surface or within internal gas spaces in mica insulation.  

It has insulating strength better than 25 kV /mm. They have permeability to microwaves.

Typical Values

Description

Muscovite

Phlogopite

Synthetic

Volume resistivity /W CM2

1014~1016

1012~1012

1014~1016

Surface resistivity W

3X1013

3X1010

3X1013

Dielectric Strength kV/0.1 mm

18~25

12~17

18~25

Dielectric Constant/100 MHz

5.2~6.4

4.6~6.0

5.8~6.4

Dissipation factor at 1 MHz

6 ~ 9

5 ~ 6

6 ~ 9

Power Factor at 50 Hz %

0.01~0.03

0.1~0.5

0.01~0.03

Power Factor at 1 MHz %

0.08~0.09

0.3~0.7

0.08~0.09

 

Declaimer Statement

Technical Data, Properties and specifications related to products described or mentioned are based on practical experience and should be used as guidelines only. We are not responsible for any loss or damage.

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Copyright 2001 Tough International (P) Ltd.
Last modified: 01/14/02