Abstract
YBa2Cu3O7−δ superconducting nanofibres were successfully fabricated via the electrospinningmethod in combination with the sol–gel process. The solution was prepared bythe sol–gel process with a homogeneous aqueous PVA solution containing Y,Ba, and Cu acetates. The viscosity of the precursor sol for electrospinning wascontrolled by the evaporation of solvent and a condensation reaction. The electrospunnanofibres were pyrolysed to remove PVA or volatile components, and thensintered to generate a superconducting phase. The critical transition temperature(Tc) ofsuperconducting YBa2Cu3O7−δ nanofibres was measured by DC susceptibility tests. By optimizing theelectrospinning process and following heat treatments, superconductingYBa2Cu3O7−δ nanofibreswith a Tc = 92.2 K could be produced.
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