Ron Youvan wrote:
>> How conductive is pure deionized water? The tube I have here ran close to
>> 7kv and the water flowed through clear plastic tubing.
>
> Pure deionized water is an insulator,
But like any insulator, it still have some conductivity. According to
http://en.wikipedia.org/wiki/Self-ionization_of_water
the self-ionisation of water gives a conductivity of 0.055 micro Siemens per
centimeter. It is temperature dependent too, so I would not trust that value
too
much, but certainly deionised water is not a perfect insulator, so it has some
conductivity.
I believe the closest you will come to a perfect insulator is a perfect vacuum,
but you can't get one of them.
It's not too hard to make a perfect conductor, but I don't believe you can make
a perfect insulator.
> like any other insulator it can be broken down with enough
> pressure (Voltage) the length of the path determines how much pressure it
> takes to break down.
The shape of the conductors does too - it is not simply voltage and distance.
Sharp pointed conductors will create a higher electric field strength than more
rounded ones, so will break down before rounded conductors with the same
voltage
and spacing.
There's some pictures of the electric field for 4 different transmission (white
is higher).
http://atlc.sourceforge.net/examples.html
Note how the electric field is highest as the corners.
dave
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