Matthew Schneider Posted May 14, 2021 Share Posted May 14, 2021 So this subject I've had not much luck getting any straight answers. Even called a refractory company today and they couldn't tell ne if any of their materials could be used to make them. SO I'm going to list the available refractories and hopefully someone is more knowledgeable than I to see if it's possible to make my own from any combination of what I can get not far from where I live. One of the things I believe I've read the traditional(I think) crucibles we're made from is MULLITE. Ive seen bricks made from it that were the highest temp rated I've seen. Here's the list: :MIZZOU PLUS DENSE CASTABLE 3000°F :MIZZOU PLUS CASTABLE 3000°F :GREENLITE 45L PLUS INSULATING CASTABLE :GREENSTRIPE FIRECLAY :KAST-O-LITE 30 PLUS 3000° :CALCIUM ALUMINATE CEMENT :MULCOA MULLITE GROG :SODIUM SILICATE TYPE N 40% SOLUTION :SUPER 32 HIGH TEMP MORTAR 3200°F There's other ingredients at ceramics supply stores too but is it possible to make a crucible that would survive at least one melt with a combination or one of these? My knowledge of clay and ceramics isn't like my knowledge of steel and iron. I just found 2 different kinds of clay by the river one is almost black with some streaks of what looks like rust and another that is light brown and seems to have formed in pockets in the soil. Both are very fine and moldable, should be easy to refine it further but it's pretty good as it is. Is it at all possible to add a high percentage of alumina to this to use even for one melt? I'm not expecting ones I make to last like a salamander super crucible but if I could mix something up to withstand the heat fir one melt I'd be happy. I plan on experimenting but someone more knowledgeable on this pointing me in the right direction to start would be awesome. Thanks for your time! OHH all these are from: HIGH TEMP INC. In Portland, Oregon Link to comment Share on other sites More sharing options...
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