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Unread 11-22-2005, 05:11 PM   #1
Joe
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Default CoolLaboratory liquid metal thermal compound??!

Ok now this is based off a link posted in the Pro/Chat.

http://www.frostytech.com/permalink.cfm?NewsID=46586

I thought quickly, and realized that there wasnt much out there that could match the qualities they mentioned without being somewhat toxic, or dangerous. Anyone know of any metal thats a liquid or near liquid at room temp that doesnt 1. ignite in the presence of water vapor in air (NaK coolant), 2. cause central nervous system damage and lung damage with its vapors (Mercury). Gallium isnt liquid at room temp (a bit above room temp, but once above there turns into the consistency of water, and would run rather easily). Inidium is nearly the same as Gallium.

After reading all that, I had to think its a mercury amalgam that makes it not as watery as Mercury at room temp. Some amalgams are "safe" but its still mercury. They dont seem to realize that Mercury and Aluminum when they form an amalgam, it causes rapid oxidation, and causes the flakes of dust that gets into the air from that to be potentially dangerous to inhale.

Heres a link about it:
http://yarchive.net/chem/aluminum_mercury.html

the stuff they describe in there, to me seems very similar to what Frosty saw earlier.

Thats awesome. BTW I am going to be releasing my Radium based TIM Compound! Coming to stores near you, just add phosporus to it and watch it glow green! Its the new hotness!

Its amazing how stupid some people can be to buy stufff like this...
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Last edited by Joe; 11-22-2005 at 05:52 PM.
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Unread 11-22-2005, 05:46 PM   #2
ricecrispi
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Right in front of my nose!

Lol. Must be translated.
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Unread 11-23-2005, 02:00 AM   #3
Huckleberry
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I can verify the aluminum/mercury connection in regards to rapid oxidation.

I've played with mercury containing substances, and how they encourage rapid aluminum oxidation. So rapid, in fact, that aluminum (at least thin sheets of it) heat up beyond the boiling point of water. I have also noted that water seems to fuel the reaction - I suspect by providing a readily available source of oxygen.

Reactions I've seen require VERY, VERY little mercury. Just a little mercury = big result. Looking at the Frostytech article (which I suspect involved a very large amount of mercury) it's no wonder the aluminum almost disappeared.
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Unread 11-23-2005, 03:19 AM   #4
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I believe it was already revealed that the composition is largely indium and gallium:
http://www.allround-pc.com/index.php...03/bericht.htm

From the french forums linked in the frostytech article they mention many times that the manufacturer confirmed this in e-mails and that the exact composition is something like:
gallium 66%, indium 20%, 11% tin, copper 1%, 1% of zinc and 1% of bismuth
...if bablefish hasn't let me down.

"An alloy of 24% indium and 76% gallium is liquid at room temperature."
Taken from here: http://www.webelements.com/webelemen...xt/In/key.html

Gallium and aluminum form an eutectic mixture as well. No mention in the article or forums if any gas was released and the guy ran it under the faucet. Plus I think Germany has some regulation of mercury. The lawsuits alone from the health risks regarding mercury content would make it a pretty dumb idea as a business venture. Highly unlikely, unless this is some ultra-slow anthrax plot. :shrug:

Last edited by Anonymous; 11-23-2005 at 03:30 AM.
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Unread 11-23-2005, 05:33 AM   #5
montyt
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is this related to what your talking about http://www.frostytech.com/permalink.cfm?NewsID=46586
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Unread 11-23-2005, 05:57 AM   #6
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Quote:
Originally Posted by montyt
is this related to what your talking about http://www.frostytech.com/permalink.cfm?NewsID=46586
I'm disappointed this site hasn't adopted a suitable smilie for these occasions.
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Unread 11-23-2005, 10:30 AM   #7
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haha. Well from what I understand, Gallium/Indium dont cause aluminum to oxidize that rapidly compared to what Mercury does. Maybe I am wrong on that...

its deffinitely interesting.

On that web elements page it lists indium as not too healthy:
Quote:
Indium compounds are encountered rarely by most people. All indium compounds should be regarded as highly toxic. Indium compounds damage the heart, kidney, and liver, and may be teratogenic.
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Unread 11-23-2005, 10:49 AM   #8
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Hmm... heart damage or better cooling....


Honestly, its a toss up.
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Unread 11-23-2005, 11:40 AM   #9
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Would be interesting to get one of the profs to run it through a mass spectrometer or at the least discuss health risks. Not my stomping ground unfortunately.

Did google a couple MSDS for similar mixtures:
http://www.rgmd.com/therm/msds.pdf
http://www.prism.princeton.edu/PRISM...DS/Gallium.pdf
http://www.aimsolder.com/msds/MSDS_A...um-Indium_.pdf

Think I'll just settle for popping the IHS. No need for "guinea pig" on resume.
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Unread 11-23-2005, 11:45 AM   #10
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that last MSDS sheet looks a bit evil
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Unread 11-23-2005, 12:24 PM   #11
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The best lessons to ever learn are the ones that are expensive and paid for by someone else.

Glad I didn't put this stuff on my block, and a big THANK YOU goes out to FrostyTech for paying for this lesson so I don't have to.

edit: Actually, it was some french forum (Nokytech?) user. But, at least it got reported.
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Unread 11-23-2005, 01:22 PM   #12
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there is a reason mercury cannot be transported on aircraft

that solder is innocuous, pg4 not toxic
molten metal will cause burns, lol

those alloys are used in thermal mgmt apps
- not this liquid metal crap
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Unread 11-28-2005, 09:20 PM   #13
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Default Re: CoolLaboratory liquid metal thermal compound??!

The picture with the hand holding the bottle is from here.

http://sci-toys.com/scitoys/scitoys/...uid_metal.html

I read that page probably a year ago and the interesting tidbit it contains is this.

Quote:
In the same way that mercury alloys with other metals to make amalgams, gallium also alloys with other metals. When a small drop of gallium is placed on aluminum foil, for example, it will combine with the aluminum to make a liquid with a crusty surface, as in the photo below.

The alloy eventually combines with all of the aluminum, dissolving a hole in it.

If a drop of water is added to the resulting bead of liquid metal, the water combines vigorously with the aluminum, making a hot solution of caustic aluminum hydroxide.
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