dave321 Posted May 29, 2011 Share Posted May 29, 2011 has anyone ever played around with bismuth trioxide and silicon ?sort of a less toxic red lead siicon version. had a quick "look see" today out of curiosity, 90/10 80/20 70/30 bismuth to silicon seem the usual mixtures, with 90/10 being the quickest. suppose could always include copper oxide as well, a bit like in the old lead dioxide/copper oxide/siicon system (33:33:33) havent got anything in particular in mind, just had a bit of curiosity on low gas delay mixtures. anyone else familiar with them? dave Link to comment Share on other sites More sharing options...
WSM Posted May 29, 2011 Share Posted May 29, 2011 has anyone ever played around with bismuth trioxide and silicon ?sort of a less toxic red lead siicon version. had a quick "look see" today out of curiosity, 90/10 80/20 70/30 bismuth to silicon seem the usual mixtures, with 90/10 being the quickest. suppose could always include copper oxide as well, a bit like in the old lead dioxide/copper oxide/siicon system (33:33:33) havent got anything in particular in mind, just had a bit of curiosity on low gas delay mixtures. anyone else familiar with them? dave I have worked with variations of the same mixture since 1993. It seems nearly identical to the lead (Pb) variety of compositions, minus the toxicity. WSM Link to comment Share on other sites More sharing options...
dave321 Posted May 30, 2011 Author Share Posted May 30, 2011 I have worked with variations of the same mixture since 1993. It seems nearly identical to the lead (Pb) variety of compositions, minus the toxicity. WSM hi, can you elaborate on what you have tried and what for ?pm me if preffered thanksdave Link to comment Share on other sites More sharing options...
WSM Posted May 30, 2011 Share Posted May 30, 2011 (edited) hi, can you elaborate on what you have tried and what for ?pm me if preffered thanksdave I keep the information in the "primes and first fire" section of my research notes. It is hot and sparky enough to ignite "hard to light" items , yet low toxicity (which may work well for indoor or proximate effects). WSM Edited May 30, 2011 by WSM Link to comment Share on other sites More sharing options...
dave321 Posted May 30, 2011 Author Share Posted May 30, 2011 I keep the information in the "primes and first fire" section of my research notes. It is hot and sparky enough to ignite "hard to light" items , yet low toxicity (which may work well for indoor or proximate effects). WSM yes, its easy to ignite and very hot. did you ever try modifying it with a 3rd component/oxidiser or inert material like kaolin? dave Link to comment Share on other sites More sharing options...
Mumbles Posted May 30, 2011 Share Posted May 30, 2011 Certain mixtures of bismuth trioxide and boron at least have been known to be quite impact sensitive. Red Lead and silicon has been known to ignite from friction specifically, but others sources should be suspected as well. I'd be careful with these mixes, treat them with respect. Link to comment Share on other sites More sharing options...
WSM Posted May 31, 2011 Share Posted May 31, 2011 Certain mixtures of bismuth trioxide and boron at least have been known to be quite impact sensitive. Red Lead and silicon has been known to ignite from friction specifically, but others sources should be suspected as well. I'd be careful with these mixes, treat them with respect. Absolutely true. I have long suspected thermitic mixtures (Goldschmit reaction mixtures) of being friction sensitive. Many are the stories of disasterous incidents involving mixtures that included thermite components in them plus rough handling. A friend acquired two large steel bearings (roughly 2-1/2" in diameter) that were well rusted. I told him about a classroom demonstration where one of the bearings is wrapped with aluminum foil and the two bearings are struck together a reaction occurs. He did it and every time he struck them together a loud pop (a bit louder than toy caps) and a very fine spray of white aluminum sparks flew! They reminded me of the novelty, "Blaster Balls"; but on a whole new level!!! Definately treat them with respect and be very careful. WSM Link to comment Share on other sites More sharing options...
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