[Prev][Next][Index][Thread]

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