Repairing NdBCO-HTSC Powder by Electromagnetic Separation
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The aim of this work is to demonstrate the possibility of enriching NdBaCO superconducting powders by electromagnetic separation (EMS) into fractions, which differ substantially in their physical, chemical and superconducting properties. Significant differences in the properties of these fractions were seen. The concentrate fraction amounted to an average of 60–70% wt and was characterized by better superconducting properties, while the tail properties were essentially lower, as required for preparation of superconductors. The concentrate is actually an enriched superconducting powder with optimal quality and the tail is a recycle fraction needing additional thermo-chemical treatment. In addition, the possibility of using EMS as an express method for evaluation of powder quality and quick correction of synthesis parameters will be discussed.
KeywordsNdBaCO-degraded powders Electromagnetic separation Thermo-chemical treatment
PACS07.00.00 47.57.-s 75.80. +q 74.70.-b 85.70.Ay 81.40.Rs
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