Elsevier

Materials Letters

Volume 11, Issues 10–12, August 1991, Pages 334-338
Materials Letters

Preparation of orthorhombic YBa2Cu3O7−δ by spray-drying formate solutions

https://doi.org/10.1016/0167-577X(91)90128-SGet rights and content

Abstract

A simple, low cost process has been developed for the preparation of orthorhombic YBa2Cu3O7−δ superconducting powder by spray-drying formate solutions. Yttrium oxide, cupric oxide and barium carbonate are dissolved in formic acid and spray-dried. The spray-dried powder is “charred” at 95°C prior to calcination to avoid undesirable melting and/or dissolution. The charred powder is calcined to produce phase-pure, superconducting YBa2Cu3O7−δ product. Superconducting powder can also be prepared from acetate solutions.

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