Understanding the Use of Mica in Capacitors: Key Factors and Considerations

[ahjie]

If fill mica between the air gaps between capacitors will how?
We need consider mica as conductor?

 

[berkeman]

If fill mica between the air gaps between capacitors will how?
We need consider mica as conductor?

No, mica is an insulator. Look up the dielectric constant of mica, and compare that value to the dielectric constant of air. Do you see now why mica is used in capacitor construction?

 

[ahjie]

No, mica is an insulator. Look up the dielectric constant of mica, and compare that value to the dielectric constant of air. Do you see now why mica is used in capacitor construction?

If the dielectric constant of mica is 5, then apply this formula?(C=κC。)

so make the capacitance of that capacitors higher?is it like this?

 

[NascentOxygen]

Also compare breakdown voltage of mica cf. air http://www.allaboutcircuits.com/vol_1/chpt_12/8.html

 

[berkeman]

If the dielectric constant of mica is 5, then apply this formula?(C=κC。)

so make the capacitance of that capacitors higher?is it like this?

Yes. And then add in the comment from NascentOxygen, which I didn't even think of...

 

[Enthalpy]

Mica has been a fantastic dielectric but is abandoned now. We have ceramics.