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GeneralRe: Who Else Hates This? Pin
enhzflep29-Nov-20 16:27
enhzflep29-Nov-20 16:27 
GeneralRe: Who Else Hates This? Pin
dandy7230-Nov-20 6:38
dandy7230-Nov-20 6:38 
QuestionRe: Who Else Hates This? Pin
W Balboos, GHB29-Nov-20 6:51
W Balboos, GHB29-Nov-20 6:51 
AnswerRe: Who Else Hates This? Pin
OriginalGriff29-Nov-20 7:19
mveOriginalGriff29-Nov-20 7:19 
GeneralRe: Who Else Hates This? Pin
DerekT-P27-Nov-20 6:24
professionalDerekT-P27-Nov-20 6:24 
GeneralRe: Who Else Hates This? Pin
W Balboos, GHB29-Nov-20 6:48
W Balboos, GHB29-Nov-20 6:48 
GeneralRe: Who Else Hates This? Pin
GenJerDan29-Nov-20 23:02
GenJerDan29-Nov-20 23:02 
GeneralRe: Who Else Hates This? Pin
W Balboos, GHB30-Nov-20 3:49
W Balboos, GHB30-Nov-20 3:49 
Metallic content in the ceramic glaze can be a fact it's more content of the ceramic, itself. Most "metallic content" is inert to the microwaves (transparent). After all, the ceramics, themselves, are primarily aluminum (tri)oxide and silicon dioxide. In an oxidized form, most metallic elements lose their metallic properties (rust is typically diamagnetic vs. iron, which is ferromagnetic). Not quite a guarantee. Magnetite is an iron oxide that is ferromagnetic - and is the original way that humans discovered magnetism.

The primary absorbers of the microwave radiation in your oven are -OH bonds (a rotational resonance). The resonance means they absorb the radiation and try to rotate - which, banging around against other molecules, ends up as transnational and finally thermal energy. Besides water, other (particularly organic) molecules contain these bonds and bonds with (very) near resonant frequencies. Fats and oils (cooking, not motor), for example.

Now in the raw, many metal oxides are, in fact, hydrated to varying degrees (as are a lot of compounds: e.g., copper sulfate is white but the most common form of it, the hydrate, is quite bright blue). During the scintering process, the water is driven off. Also, hydroxy bonds are dehydrated as the matrix of molten oxides is formed. Ceramic are, at least internally, anhydrous and amorphous metal oxide hunks. Transparent to microwaves.

Metals, themselves, can act as an antenna, absorbing the microwaves and once absorbed, get really hot really fast. If they have a point, which is a place that would cause a local higher potential:   sparks ! Smooth rounded things can act as shields (like aluminum foil to prevent local overheating - but I've never risked it). Thing metallic decorations put on a one-time beautiful display as they burn up (and become transparent to microwaves as oxides).

Now I cannot dismiss 100% that a metallic coating is at fault but realizing it is competing with a massive (by comparison) sink of water (used to spread the delight of coffee into a greater portion of the universe) lead me to think it's intrinsic to the selection of materials in the starting clay (whether deliberate or as impurities).

Ravings en masse^
"The difference between genius and stupidity is that genius has its limits." - Albert Einstein
"If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010

GeneralSound of the Week Pin
Sander Rossel26-Nov-20 22:50
professionalSander Rossel26-Nov-20 22:50 
GeneralRe: Sound of the Week Pin
yacCarsten27-Nov-20 3:09
yacCarsten27-Nov-20 3:09 
GeneralRe: Sound of the Week Pin
Sander Rossel27-Nov-20 3:49
professionalSander Rossel27-Nov-20 3:49 
GeneralRe: Sound of the Week Pin
yacCarsten28-Nov-20 3:05
yacCarsten28-Nov-20 3:05 
GeneralRe: Sound of the Week Pin
Sander Rossel28-Nov-20 8:33
professionalSander Rossel28-Nov-20 8:33 
GeneralWSO CCC OTD 27-Nov-2020 (SOLVED) Pin
DerekT-P26-Nov-20 22:18
professionalDerekT-P26-Nov-20 22:18 
GeneralRe: WSO CCC OTD 27-Nov-2020 Pin
TheRealSteveJudge26-Nov-20 22:29
TheRealSteveJudge26-Nov-20 22:29 
GeneralRe: WSO CCC OTD 27-Nov-2020 Pin
DerekT-P26-Nov-20 22:33
professionalDerekT-P26-Nov-20 22:33 
GeneralRe: WSO CCC OTD 27-Nov-2020 Pin
TheRealSteveJudge27-Nov-20 1:04
TheRealSteveJudge27-Nov-20 1:04 
GeneralRe: WSO CCC OTD 27-Nov-2020 Pin
DerekT-P27-Nov-20 1:13
professionalDerekT-P27-Nov-20 1:13 
GeneralRe: WSO CCC OTD 27-Nov-2020 (with hint) Pin
5teveH27-Nov-20 2:21
5teveH27-Nov-20 2:21 
GeneralRe: WSO CCC OTD 27-Nov-2020 (with hint) Pin
DerekT-P27-Nov-20 2:30
professionalDerekT-P27-Nov-20 2:30 
GeneralRe: WSO CCC OTD 27-Nov-2020 (with hint) Pin
5teveH27-Nov-20 2:32
5teveH27-Nov-20 2:32 
GeneralYou can take the boy out of programming Pin
F-ES Sitecore26-Nov-20 21:26
professionalF-ES Sitecore26-Nov-20 21:26 
GeneralRe: You can take the boy out of programming Pin
Richard MacCutchan26-Nov-20 21:32
mveRichard MacCutchan26-Nov-20 21:32 
GeneralRe: You can take the boy out of programming Pin
OriginalGriff26-Nov-20 21:39
mveOriginalGriff26-Nov-20 21:39 
GeneralRe: You can take the boy out of programming Pin
DerekT-P26-Nov-20 22:32
professionalDerekT-P26-Nov-20 22:32 

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