Body
It is also important that there's no air between the electrodes and the electret as air has a very low dielectric constant. If a dielectric with a lower dielectric constant is put in series (stacked) with a dielectric layer having a higher dielectric constant more of the electric tension (voltage) is distributed to the layer having the less dielectric constant.
Instead of using extremely high tension the electret can be made of thinner layers of less voltage and then stacked afterwards for achieving a higher tension. This is like stacking permanent magnets to increase the magnetomotive force. If the voltage flashes through the dielectric the dielectric must be made thicker or alternatively the voltage must be decreased.
Regards
Ole
---In [email protected], <schoonersolsticemoon@...> wrote :
Hi Vitalie I have tried making electrets
It is very important to have a dust free space.
In my case there was a trace of aluminium dust from a metal polishing machine contaminating the air.
This does not allow electrets to be made as the dielectric nature of the wax is ruined.
I also, only used a 10,000 volt dc source.
Perhaps, as Doug suggests, it should have been greater, but the dust was a deal breaker in any case.
Cheers Warren
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On Thu, Jan 18, 2018 at 1:56 PM, konehead@... [EVGRAY]
<[email protected]> wrote:
Hi Vitalie
Thanks for the link to the Kaizer electronics website, it is very good, some great projects and I noticed people asking questions when they build something get their questions answered very professionally too....there are lots and lots of projects easy to read very good thanks...
As for electrets, "I think" you should have 14KV DC or so, apply to some sort of electret material while it is very hot for I do not know how long of time for sure, then let it cool the charge should stay indefinite but I don't know this is just what I have read here as I have never attempted electrets....Hopefully Hector can help you with it......
ciao
Konehead