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Re: Distilled water as a dielectric?



Original poster: "Peter Terren" <pterren@xxxxxxxxxxxx>

The problem is that it is hard to make deionised water stay deionised. Once you put ordinary metal contacts in the water and pass a current you start to get ions. There are dissolved gases such as CO2 that dissociate into H+ and HCO3- that can combine with metals. In some casual HV experiments with deionised water open to the air the conductivity increased over a day or two.
http://tesladownunder.com/Other_HV_stuff.htm#Strange%20HV/water%20effects
In TC use your mileage would be less although it could be replaced/re-deionised continuously. Platinum capacitor plates may help.


Peter
Tesla Downunder.com

Original poster: Greg Morris <gbmorris@xxxxxxxxx>
...It's pretty simple, but would be adjustable and have a range of capacitance up to
0.022302 uF according to the equation C=8.85*10^-12*DC*A/D * (N-1) where C
is capacitance, DC is dialectric constant, which of distilled water is
conservatively estimated to be 70, A is area and is 225cm² (15cm * 15 cm),
D is plate spacing and is 5mm, and N is the number of plates which is 9. A
couple of diagrams are found here. (unfortunately those images didn't take
the uploading process very gently, for a better look feel free to email me
at GBMorris@xxxxxxxxx). Anyhow this capacitor design seems very simple and
I'm rather surpised no one else seems to use distilled water.... Is there a
reason for this; am I missing something?
There, hope that was clear. Thanks for any info you can provide.


Greg