Re: Distilled water as a dielectric?

["Tesla list" <tesla@xxxxxxxxxx>]

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