Friedrich Wöhler
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High temperature in microvae oven soooo easily ???
Searching google I found a German page
http://www.evbg.de/de/sinus/materialien/chemie/c10lv_glasher...
where they described a glas manufacture in a stupid simple mcirowave oven.
I was thinking, what an extra-terrestric material must be to found what absorbs these 2,5 Ghz so completely like water...
But they used simplest refractory clay as "energy collector".
Left picture shows a normal flower pot filled with refractory clay (light brown in photo) with a porcellain-labor-crucible. Its safed with some
graphite powder against baking on.
They write, just 60 sec after switching on, content of crucible was completely glowing.
I don' believe.....
/edit:
clicking a smily [  ] in subject, its never shown... (?)
[Edited on 16-2-2004 by Friedrich Wöhler]
Kein Schwanz ist so hart wie das Leben.
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Polverone
Now celebrating 21 years of madness
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<A HREF="http://home.c2i.net/metaphor/mvpage.html">Microwave melting of metals</A>
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Friedrich Wöhler
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Oh oh! Shit, I had a mistake!  (I become too old, time to go fifty centimeters
under grass...) Only the glas mixture was glowing!
Thus an ideal energy absorber must be a material with similar structure like borosilikate-glas but much higher melting point...
quartzglas maybe....?
Has anyone such glas to test it?
Kein Schwanz ist so hart wie das Leben.
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Polverone
Now celebrating 21 years of madness
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When glass is heated, ions become mobile. Therefore the glass becomes electrically conductive, and it can be heated from induced currents moving
through it. So pre-heating glass with a torch and then tossing it in the microwave oven while still hot allows it to become very hot indeed.
<A
HREF="http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=vufonjkfck6b28%40corp.supernews.com&rnum=19&pre
v=/groups%3Fq%3Dmicrowave%2Bmelt%2Bglass%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26scoring%3Dd%26start%3D10%26sa%3DN">melting a
rock</A>
<A
HREF="http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&frame=right&rnum=1&thl=0,999975186,999968998,999940043,
999922946,999708482,999445079,999963976,999963807,999941574,999812123,999906552&seekm=2251b4e6.0311291242.3348b924%40posting.google.com#link1"
;>melting a beer bottle</A>
I rather like this high-temperature microwave experimentation. When I have a bit of extra money to pick up a second microwave, I plan on seeing how
one can be (ab)used for high-temperature chemistry.
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Friedrich Wöhler
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| Quote: | | ...When I have a bit of extra money... |
Hmmm ?? :surprising:
Still never been on a recycling place? Never got an old microwave oven for 3,-- $ or totally cost-free?
Tomorrow I'll send you a cargo ship full of them!
Btw...
Anywhere I did a General short-test, dismantled a magnetrone from an oven and installed it provisionally at a some bigger iron-pot, containing bit of
water. Worked great, in few seconds water was hot. Nevertheless I read, dimensions of oven are accurately adjusted on
wave-conditions.
...Wöhler still feels and counts in D-Mark, not in 'Euro'...
Kein Schwanz ist so hart wie das Leben.
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Geomancer
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Yes! I too have been interested in this. Apparently there is nothing special about the 2.5GHz frequency. Although water has well defined rotational
frequencies in the vapor phase, liquid water molecules interact to absorb over a broad range. Most people say silicon carbide is the best susceptor
for high temperature work, although Reid prefers graphite/magnetite. Any finely divided conductive material will also do, notably Al powder.
A while ago I carried home an old microwave someone left out as trash. After thoroughly washing it out, I discovered I didn't remember how to
connect the control circuitry or the magnetron polarity. Also, I have yet to obtain any refractory material. I'll get back to it some day. For
now, I'm occupied with my charcoal furnace (for phosphorus). It's not as efficient or elegant, but still impressive in its own way.
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Friedrich Wöhler
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| Quote: | anyone in usenet wrote
> Top 10 things to do when you've drank your last beer:
>
> 10) Spin the foam around in the bottom of the bottle and sigh
> 9) Toss the bottle in the trash can
> 8) Wipe you're mouth with your shirtsleeve
> 7) Belch
> 6) Take a big whiz
> 5) Sit and think, "What am I going to do now?"
> 4) Get the bottle back out of the trash
> 3) Wipe the unknown substance from the bottle
> 2) Put the bottle in the microwave, set to high power
> 1) Post the details to usenet
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Kein Schwanz ist so hart wie das Leben.
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Texium
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Thread Moved
19-11-2023 at 09:56 |
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