artificier Posted May 13, 2006 Posted May 13, 2006 hi i will talk about thermite and different thermite comp:the basic thermite is:-74.7 % iron oxide-25.3 % aluminium this is the perfect thermite mixture like :http://img481.imageshack.us/img481/6236/thermitemix2zv.jpgthermite reaction:http://img117.imageshack.us/img117/9373/th...eskillet3ja.jpg i found lot of recipe of different thermite mixture: red thermite:-80% lead tetraoxide-20% ferrosilicon baryte thermite:-2% barium sulphate-59.2 % black iron oxide-25.3 % aluminium Calcium sulphate thermite:-57.8 % calcium sulphate (plaster of paris)-1 % sulphur-40.9 % aluminium-0.3 % castor oil one of you know more thermite comp ?
kwstag Posted May 13, 2006 Posted May 13, 2006 I remember hearing of a CuO composition, which burns even hotter in place of Fe2O3. I don't know ratio's though.
[w00t] Posted May 13, 2006 Posted May 13, 2006 CuO + Al suppose to explode isnt it? I saw somewhere that it was tested on a plastic cup and it burnt with a 'whoosh' and left the plastic cup unmelted. Theres also the one with added sulfur ontop of the normal ratio. where the thermite is heated in the oven and then sulfur sprinkled on it.
artificier Posted May 13, 2006 Author Posted May 13, 2006 yeah i remember CuO+Al thermite its a powerfull stuffthis is a video: (right click " save as") 1 http://ww1.webtop100.net/~62552/xmovies.we...nium-target.mpg 2http://ww1.webtop100.net/~62552/xmovies.we...ppertargets.mpg 3http://ww1.webtop100.net/~62552/xmovies.we...s/copperdet.mpg 1 and 2 its impact of a bullet hit the CuO/Al and the video 3 is ignited with primary HE detonator
murderskill Posted May 14, 2006 Posted May 14, 2006 (edited) Holy crap.. Looks like some powerfull stuff. I added the video of the thermite they were selling on ebay.1 lb burn Edited May 14, 2006 by murderskill
artificier Posted May 14, 2006 Author Posted May 14, 2006 Awesome all grass around the thermite comp are burned by the heat ! its a very powerfull stuff !
murderskill Posted May 14, 2006 Posted May 14, 2006 Yes it is!! did you see it only took like 3 or 4 seconds?
aquaman Posted May 14, 2006 Posted May 14, 2006 I would think that it is dangerous. It is throwing molten iron around at around 4500°F.
artificier Posted May 14, 2006 Author Posted May 14, 2006 yes very dangerous ! you must ignite thermite on hard surface like metal plate NOT on the grass !
Mumbles Posted May 14, 2006 Posted May 14, 2006 Did a bit of spring cleaning for detonation talk. And yes, there is NO detonation talk outside of the HE section.
Rogue Chemist Posted May 14, 2006 Posted May 14, 2006 ,May 13 2006, 03:09 PM] I saw somewhere that it was tested on a plastic cup and it burnt with a 'whoosh' and left the plastic cup unmelted. That was me, but it was with a paper cup being left unburned. I enjoy CuO/Al and CaSO4/Al(cast of course), regular Fe2O3/Al bores me.
kwstag Posted May 15, 2006 Posted May 15, 2006 Well I tried some today. Here you go Videos:http://video.tinypic.com/player.php?v=zsk5t24g http://videos.streetfire.net/video/D84E62D...056CE0B2F1B.htm8g Pic after:http://i1.tinypic.com/zsl1d2.jpg -stag
asilentbob Posted May 15, 2006 Posted May 15, 2006 Another i have heard of is Al/MnO2, i believe from SMDB... IIRC it has been used as a rocket propellent called ALMAD which burns really bright because of produced manganese afterburning behind it. IIRC when i did further searching on it i came up empty. Al/Fe2O3, CuO/Al, and Al/MnO2 are on my list of compositions to try before/during the 4th.
FrKoNaLeaSh1010 Posted May 15, 2006 Posted May 15, 2006 I was lucky enough to obtain a small amount of vanadium pentoxide (V2O5) from my chem teacher two years ago and made some V2O5/Al thermite however I dont remember any ratios or anything. I got the ratios off of SMDB in an exotic thermite thread if anyone is interested or happens to have the vanadium pentoxide.
iv81 Posted May 17, 2006 Posted May 17, 2006 I have a question. Shouldn't a thremite with Iron Oxide/MgAl be hotter or brighter since it has Mg in it? Should I try it?
ltf Posted May 17, 2006 Posted May 17, 2006 Mg/FeO3 in ratios 7/3 is almost a flash! it burns very very hot because of the magnesium. I never tried to make flash and thermite compositions with magnelium. but I'm sure it will be interesting.You should try it!
iv81 Posted May 17, 2006 Posted May 17, 2006 Ok, just did. It turns out the 60/40 comp with MgAl burned at same temperature/brighness BUT much faster!. I'd say around 4-5 times as fast as if I were to used just Al alone.
artificier Posted May 18, 2006 Author Posted May 18, 2006 cool powerfull stuff but its a fuel with a fuel ? what mesh of magnesium/aluminium is used ?
iv81 Posted May 18, 2006 Posted May 18, 2006 cool powerfull stuff but its a fuel with a fuel ? what mesh of magnesium/aluminium is used ? The magnalium I used was 600 mesh - flake I think (powerfull stuff!!) I previously tried 600 mesh Al flake that burned 4-5 times slower than with magnalium. But it was still a bit (2-3 times) quicker than the rate I see it burning in video clips. So I conclude the formula: Fe203/MgAl (60/40) mix is thermite on steiroids, burn rate is approximately 1 gram per secoond. Infact the plate I burned it on had been sitting on about 3/4 cups of cold water to prevent the plate to melt. After the gram of the stuff burned up, the water under it became pretty warm. Not sure of the energy output but its possible somone can calculate that in chemathamatical terms.
Canadian_Pyro Posted May 18, 2006 Posted May 18, 2006 I could, but I dont know the molar heat of decomposition of Fe2O3. One of the problems associated with self education.
FrKoNaLeaSh1010 Posted May 25, 2006 Posted May 25, 2006 Well my CuO arrived today and I just made a small batch of Cuo/Al in a 1.5/.5 ratio aka 3/1 and it burns insanely fast like flash powder and shot out white sparks using 600mesh indian blackhead aluminum....rather entertaining compound. I deffinitely notice some orange powder left on the metal surface i ignited it on so I assume this is the copper from the thermite reaction....rather entertaining.
rocket Posted September 1, 2006 Posted September 1, 2006 Well today I finely got round to trying the CuO/Al thermite out. I used –200mesh atomized Al and CuO from a pottery supplier at the ratio of 3 to 1 CuO/Al. It work surprisingly well I found that it went off with a nice poop when it was heated with a blowtorch. When I ignited it with fuse it still burnt fast but not all of it burnt I found small amounts left. Also when compressed in a tube and lit with fuse it was a nice fountain. http://i91.photobucket.com/albums/k300/ber...OAlthermite.jpg http://i91.photobucket.com/albums/k300/ber...Althermite2.jpg http://i91.photobucket.com/albums/k300/ber0006/P1040357.jpg
itwasntme Posted September 1, 2006 Posted September 1, 2006 Anyone ever hear of using ammonium sulfate? I remember hearing it somewhere, and I also saw a 5 pound bag of it at lowes for $3 I just need some aluminum powder. Used it up
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