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Author: Subject: Micro heating element?
Joe Skulan
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[*] posted on 28-3-2016 at 02:48
Micro heating element?


I am looking for a tiny heating element that can reach 1000°+, something on the order of 2-3mm wide and 5mm long. I want to put it the closed end of a quartz tube to create a “hot finger” for growing metal crystals by vapor deposition. Anyone aware of such a thing, either off the shelf or easily home made?

Thanks
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yobbo II
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[*] posted on 28-3-2016 at 04:10



The elements used and sold for 'vaping' may do the job.
They are a short coil of Kanthal wire

Yob
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Joe Skulan
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[*] posted on 28-3-2016 at 04:12


good idea-- if they get hot enough.
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Maker
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[*] posted on 28-3-2016 at 05:16


Buy a spool of Nichrome/Kanthal wire, you can make your own heating elements in any shape or size you want, and they can run at any temperature up to about 1400°C. The size you want won't draw much current at all, you can get away with a really simple controller (Think; Potentiometer and power supply).
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Joe Skulan
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[*] posted on 28-3-2016 at 11:02


Thanks. I'm surrounded by DIY vapers, so this will be easier than I thought.
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brubei
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[*] posted on 28-3-2016 at 11:21


maybe induction
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Oscilllator
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[*] posted on 28-3-2016 at 15:01


Maybe a cigarette lighter from an old car? They have a perfectly shaped small circular coil of wire that can get up to red heat at least.
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Magpie
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[*] posted on 28-3-2016 at 15:22


Maybe there is something of use here: elec heated tube



The single most important condition for a successful synthesis is good mixing - Nicodem
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3DTOPO
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[*] posted on 29-3-2016 at 19:04


They sell little SiC heaters on eBay. SiC is continuously good for around 1500C.

http://www.ebay.com/itm/FF003-SIC-Hot-Surface-Ignitor-for-Rh...

http://www.ebay.com/itm/New-Ignitor-Goodman-B1401018S-B14010...

Or as suggested, induction (perhaps with a graphite inductor in your quartz tube):
http://www.amazon.com/gp/product/B017UABBQY/ref=s9_simh_gw_g...
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3DTOPO
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[*] posted on 29-3-2016 at 23:53


PS. The induction heater with graphite would be good to around 3000C, provided of course the tube is kept cool and filled with argon (not just any inert atmosphere) or a vacuum.
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