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Effect of nano-particles SnO2 and CeO2 addition on the Y123/Y211 sample grown in a microwave furnace

Abstract : It is well known that the critical current density (Jc) of Y123 bulk superconductor can be increased by the introduction of non superconducting flux pinning centers such as small secondary phases precipitates (1 μm3). Thus, several studies have shown that the introduction of CeO2 and SnO2 powders allows the formation of micron size secondary phases homogeneously distributed in the Y123 matrix allowing an increasing of Jc. As the precipitates size should be a crucial parameter that affects pinning properties of Y123, this work is devoted to compare, in terms of microstructure and superconducting properties, the effect of micrometric and nanometric SnO2 particles addition in the ‘SnO2+CeO2’ doped sample. It was shown that the addition of nanometric SnO2 particles, compared with an addition of micronic SnO2 particles, induces an increasing of the reactivity between the liquid phase and the dopants. Then, Y211 coarsening is not reduced and micronic secondary phases is formed conducting to obtain no improvement of the superconducting properties.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02454749
Contributor : Sylvain Marinel <>
Submitted on : Friday, January 24, 2020 - 5:20:23 PM
Last modification on : Saturday, March 28, 2020 - 10:40:11 AM

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S. Marinel, G. Desgardin. Effect of nano-particles SnO2 and CeO2 addition on the Y123/Y211 sample grown in a microwave furnace. Journal of the European Ceramic Society, Elsevier, 2001, 21 (10-11), pp.1919-1923. ⟨10.1016/S0955-2219(01)00143-1⟩. ⟨hal-02454749⟩

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