Jeff Gilchrist wrote:
> There is a new review of many different thermal compounds here:
> http://hardwarelogic.com/news/137/ARTICLE/2752/1/2008-03-03.html
>
> Note that between the generic stuff and the good stuff you can see a
> 13C different in temperature! Arctic Silver V did well but there are
> also some other great new non-electrically-conducting materials as
> well to choose from.
>
That article has a glaring error, where it assumes that Arctic Silver
/is/ 99% pure silver and is conductive... its not. it CONTAINS 99% pure
silver, thats a very different thing. If it was 99% silver, it would
either be a powder or a solid at room temperature. In fact, based on
their website, its 88% thermally conductive filler, and therefore 12%
oils, and that 88% is a mix of silver + zinc oxide + alumina + boron
nitride in unspecified percentages.
in fact, it is NOT conductive. From Arctic Silver's website, in plain
English....
Not Electrically Conductive:
Arctic Silver 5 was formulated to conduct heat, not electricity.
(While much safer than electrically conductive silver and copper
greases, Arctic Silver 5 should be kept away from electrical
traces, pins, and leads. While it is not electrically conductive,
the compound is very slightly capacitive and could
potentially cause problems if it bridges two close-proximity
electrical paths.)
I would have had a LOT more respect for that article if they'd done some
actual thermal conductivity/resistance tests on the compounds, as well
as verified their assumption that the silver based compounds were
conductive. These tests are not hard to do, anyone could do this with
knowledge of basic high school physics...
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