On Fri, Nov 28, 2014 at 12:53 AM, Chuck Guzis <cclist at sydex.com> wrote:
Were this a purely resistive effect, a sheet of very thin copper foil or a
graphite disk would also be great candidates for induction heating, which
(I can verify this by experimentation) they aren't. isn't. Of course, the
frequency has an effect as well.
It's interesting that copper foil won't heat up, because per my
understanding aluminum foil certainly will - don't the manufacturers warn
against using it?
So we have a situation wherein aluminum pots aren't at all suitable for
cooking, but yet foils of the same (well, a very similar) metal will burn
right through. To me this means that it should be possible to design a
purely aluminum, non-magnetic vessel of some particular shape and thickness
that does more-or-less work on an induction cooker.
And I think this illustrates my point that ferromagnetic quality is more of
an ancillary issue, rather than a primary requirement.