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Old 02-09-2006, 04:44 PM
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"Aerogel" publicly available

Some of you might recall the "Aerogel" used in NASA's recent Stardust mission to collect comet and interstellar dust samples.

It's now available to the public. United Nuclear is supplying it, via this link: http://unitednuclear.com/aerogel.htm , although, I'm sure, with a little digging around, you could probably find it cheaper.

Aerogel is the lightest and lowest-density solid known to exist. However, it's very strong -- while it weighs only 3x as much as air, it can support thousands of times its own weight. It's also a superb insulator, and was used on the Mars Pathfinder Rover for insulation.

Despite the limiting price, it might have some cool applications for custom fabrication of small parts/pieces, or it may just be something fun to play with.

More info on Aerogel: http://en.wikipedia.org/wiki/Aerogel

United Nuclear home page: http://www.unitednuclear.com

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Old 02-10-2006, 08:48 AM
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That is some amazing stuff. I wonder if it could be used as a core material in some laminated carbon fiber parts. There seemed to be several types that would take glue without dissolving. I wonder how it sands or if it could be shaped. I saw it is hard and can have fibers added to it for tensile strength It seems like it could be used for alot of impact absording applications also. At 30.00 for 1 cubic inch I don't think I'll be playing with anything large for a while. It was created because of a bet in 1931. Someone is still winning as a result of that bet. mikey
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Old 02-10-2006, 01:17 PM
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I would buy some but my mom would probably accidentally suck it up with the vacuum.
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Old 02-10-2006, 05:54 PM
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I hear it's good for 3/10ths!!! ima get some.
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Old 02-11-2006, 01:03 PM
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That united Nuclear is an amazing site.
They have some incredible stuff.
I would own every bit of it if i had enough money laying arround.
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Old 03-07-2006, 01:28 PM
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A recent development pertaining to United Nuclear...

In a setback for home tinkerers, the United States Consumer Product Safety Commission (CPSC) has taken legal action against United Nuclear. The CPSC has proposed that the purchase of certain chemicals (many of which have been included in children's chemistry sets for years), now requires an expensive ATF explosive manufacturer's license. The controlled substances include aluminum, titanium, zinc, zirconium, and sulfur. Hotrodders, home chemists, or other amateur experimenters stand to be impacted by this; not to mention small businesses in the automotive industry.

It's interesting to see how current "hot-button" political issues (homeland security, internet regulation) are now affecting home experimenters and hobbyists. It's difficult to ensure that certain substances don't fall into nefarious hands, while allowing people the intellectual freedom to experiment with fairly common elements.

Actions like this also have the potential to drive up prices on products that include newly-regulated elements such as aluminum or titanium.

Full text: http://www.unitednuclear.com/legalaction.htm
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Old 03-07-2006, 05:23 PM
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More gov't regulations?
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Old 03-07-2006, 07:16 PM
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"Not sell, give away or otherwise distribute any of the following Metals for which the particle size is finer than 100 mesh (or particles less than 150 microns in size) to any recipient who does not possess a valid
manufacturing license for explosives issued by the ATF:"

Aluminum and Aluminum alloys
Magnalium metal
Magnesium metal
Magnesium/Aluminum alloys
Titanium and Titanium alloys
Zinc metal
Zirconium metal


I can dig it. The only people that need aluminum powder, potassium perchlorate and such things already have ATF liscenses, or they need 'em. I can't think of a single use for aluminum dust and if I ever do I can get it for free at the machine shop.

Maybe I'm missing something but shouldn't these regulations exist already? Like for the last 50 years or so!


Larry
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Old 03-08-2006, 07:48 PM
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j.b.weld

went to Walmart and picked up some j.b weld to fix a couple of small items, and when i checked out ,the reg poped up a check i.d message.Asked the girl is that for real and she said you should see all the crap we have to id on, i feel like im working in a bar. later Don p,s what this has to do with the stuff you guys are talking about i dont know,it just poped in my mind.
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