Superconducting cuprates prepared by the melt quench process and containing excess Y or additives

Preparation and Characterization of a Large‐Scale YBa2Cu3O7−x Superconductor Prepared by Plastic Forming without a High‐Pressure Molding: Effect of Polyvinyl Alcohol (PVA) Addition on the Superconducting Properties

“…The YBa 2 Cu 3 O 7− x superconductor has many advantages over other high‐temperature oxide superconductors, namely, its superconducting transition above 77 K (the boiling point of liquid nitrogen) and large pinning force 6 . Several studies on the synthesis and applications of YBa 2 Cu 3 O 7− x films and bulk samples have been reported 7–9 . The bulk ceramic samples are prepared using several methods such as the slip‐casting method, the pressing method (sintering method), and the melt‐growth method.…”

Characterization of a Large‐Scale Nondoped YBa2Cu3O7−x Superconductor Prepared by Plastic Forming Without High‐Pressure Molding

“…Depending on the application, superconducting materials have been prepared as pellets, wires, or films. In order to synthesize products, numerous approaches have been tried using a variety of synthesis technologies, such as melt texturation, 7 melt‐powder‐melt growth (MPMG), 8 and quench and melt growth (QMG) 9 . In order to produce a large bulk sample, the equipment must be remodeled to fit the sample size.…”

IS Y2BaCuO5 INCLUSION EFFECTIVE PINNING SITE IN YBa2Cu3O7?

“…It is known that Y2BaCuO5 (211) particles can be dispersed in Y B a2 C u 3 0 7(123) matrix in melt proce5ses,l"6 Since nonsuperconducting particles are known to serve as pinning centers in conventional superconductors, the 211 inclusions are expected to be effective in flux pinning even in Y123.2 While Murakami et al .7 and Hojaji et al 6 have reported beneficial effect of the 211 inclusions, it has been pointed out that they are not effective since their average size is orders of magnitude larger than the coherence length.…”