 Teflon Dielectric Strength
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ScotchTapeLord
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Mon Sept 13 2010, 05:17AM
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Registered Member #1875
Joined: Sun Dec 21 2008, 06:36PM
Location:
Posts: 635
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I just did a bit more research and it looks like polycarbonate is a good compromise between the price and strength rather than OPP and teflon. Is there anything that makes teflon better for the application than polycarbonate? Polycarbonate, according to the site, has a dielectric strength, and according to other sites, has a higher dielectric constant. And it's much more affordable than teflon...
EDIT: I wish information didn't vary so much from site to site. It seems that polypropylene is better for the voltage withstanding than polycarbonate, which I think I knew... so I'll probably be scrapping my teflon plans completely now and be going with good old OPP.
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Sulaiman
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Tue Sept 14 2010, 12:26PM
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Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
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In any case,
I think that you should consider some kind of series arrangement of capacitors
to reduce the voltage-per-cap to a few kV per cap
or you will have unmanageable corona problems within the capacitor.
From memory 10 sheets of 1 mil is better than 1 sheet of 10 mil etc
Makes construction frustrating though.
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