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Is mutual separation of rare earth elements crucial for preparation of high Tc materials?

✍ Scribed by Helmer Fjellva˚g; Pavel Karen; Arne Kjekshus; Stig Lyng; Orvar Braaten

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
322 KB
Volume
153-155
Category
Article
ISSN
0921-4534

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✦ Synopsis

RE oxide/hydroxide mixtures can serve as starting materials for the synthesis of the 123 (REBa?Cu307 ~) superconductor, and a process based on such materials is far more economic than tho~e s~arting from pure RE oxide. However, in order to obtain phase pure samples, lanthanum in the RE oxide mixture must be treated as an element occupying the barium site.

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A synthetic multi-element reference material (SyRM) with a pseudo-blologlcal matnx composltlon contammg all rare earths @Es) was prepared The elemental composltlon of the SyRM was regulated by the starting materials used for the synthesis The present SyRM contains 45 elements urlth accurately known