Re: HDPE found: check my capacitor, please

• To: tesla-at-pupman-dot-com
• Subject: Re: HDPE found: check my capacitor, please
• From: Jim Lux <jimlux-at-jpl.nasa.gov> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Thu, 22 Oct 1998 12:02:29 -0600
• Approved: terryf-at-verinet-dot-com

Tesla List wrote:
> 
> Original Poster: Marco Denicolai <marco-at-vistacom.fi>
> 
> After calling nearly 30 companies here in Finland, I eventually found and
> bought 2 sheets of black HPDE, 0.8 mm thick, 1 x 2 meters. The company
> ensured me that black color is just pigment, not coal or other conductive
> stuff.
> 
> Declared properties are:
> 
> Dielectric constant:                    2.4
> Dissipation factor (-at- ? Hz):            0.0005
> Dielectric strength (? mm thickness):   80 kV/mm  (i.e. >2036 kV/mil)
> Water absorption:                       <0.01%
> 


And what might that pigment be?  The most common (by far) black pigment
is carbon. However, since they spec 80 kV/mm for the dielectric strength
it is probably ok. You might check the resistivity spec (which won't
show up in the dissipation factor, necessarily).
-- 
Jim Lux                               Jet Propulsion Laboratory
ofc: 818/354-2075     114-B16         Mail Stop 161-213
lab: 818/354-2954     161-110         4800 Oak Grove Drive
fax: 818/393-6875                     Pasadena CA 91109

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