Process for removing a copper mold from a molded body

Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – With material removal by etching – laser ablation – or...

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156656, 156666, 264317, 505450, H01L 3912, C23F 100

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active

053627121

ABSTRACT:
In the process for producing molded bodies from precursors of oxidic high-temperature superconductors a copper mold of the desired shape which encloses a solidified bismuth strontium calcium cuprate melt is treated with a solution of a soluble compound containing sulfate anions, an aqueous mineral acid and an oxidizing agent until the copper mold is dissolved. A protective layer of at least one of strontium sulfate or calcium sulfate is formed on the solidified melt.

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