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Re: Dielectric Constants and Breakdown Voltages (fwd)
From: Greg Leyh[SMTP:lod-at-pacbell-dot-net]
Sent: Sunday, November 09, 1997 5:00 PM
To: Tesla List
Subject: Re: Dielectric Constants and Breakdown Voltages (fwd)
Ken & Pat Prentice wrote:
> I'm new and have been lurking for some time.. and thought that this might help as a quick reference... I found this in one of the old electronic mags. (set your font Courier to see this properly)
>
> INSULATOR DIE..CONST. PUNCTURE VOLTS/0.001 inch
> ==================================================================
> Air.................................1.0......... 30
> Window Glass........................7.8......... 200
> Polyethylene........................2.3......... 450
> Paper (bond)........................3.0......... 200
> Polycarbonate (Lexan)...............2.9......... 400
> Teflon..............................2.1.........1000
> Polystyrene.........................2.6......... 500
> Epoxy Circuit board.................5.2......... 700
> Pyrex................................4.8......... 335
> Plexiglas...........................2.8......... 450
> PVC (rigid type)....................2.9......... 725
> Silicone RTV........................3.6......... 550
> Polyethylene Terphthalate (Mylar)...3.0.........7500
> Nylon...............................3.2......... 407
> Mineral Oil, Squibb.................2.7......... 200
> Shellac.............................3.3......... 200
>
> All measured at 1 MHz
Hi Ken & Pat,
Do you (or anyone else) know the dielectric strength of the
foam sheet PVC?
-GL