JJay
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Crucible Materials
I am looking at purchasing some crucibles for doing calcinations and melting small quantities of metals, as well as other high-temperature processes
that involve solid reactants and intermediates.
I see zirconia, alumina, graphite, and porcelain crucibles on eBay. Most hobbyists who I know who melt metal like graphite, but I'm not sure how it
would fare with oxidizing reactants. I remember using porcelain ones in chemistry classes.
What are the advantages / tradeoffs of various types of crucibles, and what kinds do you suggest keeping around for general use?
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zed
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Graphite with oxidizing reagents? Expect fire.
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Magpie
lab constructor
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I have melted silver in ceramic crucibles that I bought from a gold assay supplier. I believe they are mullite.
The single most important condition for a successful synthesis is good mixing - Nicodem
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JJay
International Hazard
Posts: 3440
Registered: 15-10-2015
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Quote: Originally posted by Magpie  | | I have melted silver in ceramic crucibles that I bought from a gold assay supplier. I believe they are mullite. |
Mullite looks like it would work well as a crucible material. It would also be excellent for tube furnaces.
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