Oxygenation and aging processes in melt textured YBa2Cu3O7-δ

Piñol, S.; Gomis, V.; Gou, A.; Martı́nez, B.; Fontcuberta, J.; Obradors, X.

doi:10.1016/0921-4534(94)91049-9

Cited by 1 publication

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“…So it is concluded that neodymium additions do not seem to have any effect on the size of the Y211 particles. In particular, no refinement leading to higher J c like for PtO 2 or CeO 2 additions [8,9] occurs. However, the additions of neodymium do not hinder the action of CeO 2 as a refiner of the Y211 particles.…”

Section: Microstructuresmentioning

confidence: 97%

“…Some of these authors [5] present good critical current densities under self-field but none has obtained the fishtail effect. On the other hand, the addition of dopants, such as CeO 2 , PtO 2 or SnO 2 in YBa 2 Cu 3 O 7−δ -Y 2 Ba 1 Cu 1 O 5 composites, leads to improved superconducting properties for different reasons such as Y 2 Ba 1 Cu 1 O 5 (Y211 for brevity) refinement or formation of secondary phases [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Neodymium as a dopant in top-seeding-melt-texture-growth-processed YBa₂Cu₃O_7−δceramics

Delorme

Harnois

Monot‐Laffez³

et al. 2002

Supercond. Sci. Technol.

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The effects of Nd 2 O 3 doping (from 0.25 to 1% wt of Nd 2 O 3 ) of top-seeding-melt-texture-growth-processed YBa 2 Cu 3 O 7−δ (Y123) ceramics are investigated. The texturing thermal cycle of the pellets is similar to the one used to texture neodymium-free Y123 samples. The SEM study of the microstructures of the doped samples does not show significant differences compared to those of textured neodymium-free Y123 samples; the size of the Y 2 Ba 1 Cu 1 O 5 particles (Y211) does not change and no secondary phase appears. From EDS analysis, neodymium is found in both the Y123 matrix and the Y211 particles (about 1.80% atom of neodymium in the Y211 particles and about 0.7% atom of neodymium in the Y123 matrix for 1% wt of Nd 2 O 3 ). After the usual oxygen annealing process used for neodymium-free Y123 samples, the samples show poor superconducting properties. A second similar annealing does not improve these properties. A new annealing process at lower temperatures (between 430 and 300 • C) leads to samples with good superconducting properties, but only similar to those usually observed for neodymium undoped compositions.

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Section: Microstructuresmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Neodymium as a dopant in top-seeding-melt-texture-growth-processed YBa₂Cu₃O_7−δceramics

Delorme

Harnois

Monot‐Laffez³

et al. 2002

Supercond. Sci. Technol.

View full text Add to dashboard Cite

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Oxygenation and aging processes in melt textured YBa2Cu3O7-δ

Cited by 1 publication

References 3 publications

Neodymium as a dopant in top-seeding-melt-texture-growth-processed YBa₂Cu₃O_7−δceramics

Neodymium as a dopant in top-seeding-melt-texture-growth-processed YBa₂Cu₃O_7−δceramics

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Oxygenation and aging processes in melt textured YBa2Cu3O7-δ

Cited by 1 publication

References 3 publications

Neodymium as a dopant in top-seeding-melt-texture-growth-processed YBa2Cu3O7−δceramics

Neodymium as a dopant in top-seeding-melt-texture-growth-processed YBa2Cu3O7−δceramics

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Neodymium as a dopant in top-seeding-melt-texture-growth-processed YBa₂Cu₃O_7−δceramics

Neodymium as a dopant in top-seeding-melt-texture-growth-processed YBa₂Cu₃O_7−δceramics