Heat transfer / electrically insulated material

[dougwatchorn]

I need to find a material that gives great heat transfer rates yet is electrically insulated. The application places the material in between two .030" thick brass terminals of opposite poles in a household device running 15amps on a 120V circuit. For UL certification the device will be subjected to a dielectric test of 2500Volts for up to 1 minute without passing through the insulator.
Cuurently I have looking into Mica at .020" thick but am seeing a loss of 28-35ºC at a running temp of 145ºC.
An ideas for other materials to try would be much appreciated - thank you in advance for your help.
Doug

 

[MintJulep]

Glass.

 

[pennpoint]

Steatite

http://www.superiortechceramics.com/materials/steatite.shtml

 

[ko99]

Doug,

There are several companies that specialize in thermal interface materials, including some materials that provide electrical insulation. A few links:

http://www.thermagon.com/DS2.asp?PAGE_ID=91

http://www.bergquistcompany.com/tm_sil_pad_detail.cfm?oid=104264

http://www.chomerics.com/products/therm_chotherm.htm

ko (

http://www.ecooling.biz)

 

[IRstuff]

aluminum nitride
beryllia

TTFN