I've just bought a new graphite crucible from China, and wanted to know if it will always leave traces of graphite on everything (like a lead pencil)
or if this effect stops on heating or other treatment?Swinfi2 - 19-2-2020 at 05:29
Mine sheds carbon worse after heating. But it washes off skin fairly easily.njl - 19-2-2020 at 05:33
pre-heating the crucible can minimize the degradation, but depending on the quality you may just have to live with the residues.RedDwarf - 19-2-2020 at 06:22
Thanks for the replies, I usually use a porcelain crucible but wanted something a bit larger. I'll just have to be aware of the potential
contamination.MrHomeScientist - 19-2-2020 at 07:18
My graphite crucibles I use for metal casting tend to flake off graphite pretty badly after being in the furnace. But your application may be less
demanding. I bought some Salamander crucibles that came highly recommended but haven't gotten around to using them yet; they have some sort of coating
that makes them hold up much better.Herr Haber - 19-2-2020 at 08:09
I've just bought a new graphite crucible from China, and wanted to know if it will always leave traces of graphite on everything (like a lead pencil)
or if this effect stops on heating or other treatment?
In my experience it will only get worst.
The more you use it, the more it will "flake off" if that makes any meaning to you.
After a dozen uses you will be able to see it perfectly if you turn the lights off and look at the red hot crucible.
