Microwave safe dishes do not heat if put in an oven without food on them to heat by conduction; "melmac" cannot be pt in a microwave because it does absorb - I don't know what's in melmac but it must have some water content that does absorb energy. Maybe the same goes for your pottery. It's REALLY hazy, chemistry was one of my worst subjects, but some compounds have a structure where they are bound to H2O molecules as in CaCO3*H2O (I just made up that combination for illustration). Such a compound could be completely "dry" but still retain H2O content. This is purely supposition on my part.
---------- >From: david_inst...@uk.xyratex.com (David Instone) >To: Ken Javor <ken.ja...@emccompliance.com> >Cc: emc-p...@ieee.org >Subject: Re: 2. 4 GHz cordless telephone, question of general interest >Date: Mon, Apr 23, 2001, 3:05 AM > > Ken Javor wrote: >> >> Just goes to show you can find anything on the net. I have measured leakage >> from microwave ovens and every one was at 2450 MHz. And that IS a resonant >> frequency for water and water alone. That's why you can put waterless items >> in and they won't heat up, > > Hm, now I wonder how the the totally dry and empty pottery plate I put > in the microwave to heat (before I put my non microwave cooked food on > it) gets too hot to hold after just 60 seconds at 650W. > > >> and also why you should never run a microwave >> oven without a water load: with no load you get high vswr and the magnetron >> can be damaged by reflected energy. > -- > Regards > > Dave Instone. Compliance Engineer > Storage Systems Development, MP24/22 > Xyratex, Langstone Rd., Havant, Hampshire, P09 1SA, UK. > Tel: +44 (0)23-92-496862 (direct line) > Fax: +44 (0)23-92-496014 > http://www.xyratex.com Tel: +44 (0)23-92-496000 > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
