I once warmed up some leftover take-out Chinese food in the take-out containers with the metal handle. The laws of physics worked -- the handle burned the container.
Water is apparently resonant at 2450 MHz, but metal also reacts to EM waves. Your dishes may have metallic compounds in the glazes or substrate. This will definitely warm up the "fajita platter". :-) Don Umbdenstock > ---------- > From: Ken Javor[SMTP:ken.ja...@emccompliance.com] > Reply To: Ken Javor > Sent: Monday, April 23, 2001 9:50 AM > To: dinst...@uk.xyratex.com > Cc: emc-p...@ieee.org > Subject: Re: 2. 4 GHz cordless telephone, question of general > interest > > > 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," > ------------------------------------------- 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,"
