"cleaning" alumina crucible

could anyone suggest me how to "clean" alumina crucible. i tried to sinter some powder at 800C and it left behind some coating inside the crucible. tried using conc. acids, but not working well..any suggestions!!!

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What powder did you try to sinter in an alumina crucible?

Michael Dahms

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Michael Dahms

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You must check by separate experiments, which acids dissolve the above mentioned compounds.

Very often, a crucible can be just used once, if strong reactions with the sintered powder occur. Or a certain crucible is always used for a certain type of powder.

Michael Dahms

BTW: Please read

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Michael Dahms

Thanks!!.

Michael Dahms wrote:

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