Entrapment of Y2BaCuO5 particles in melt-textured YBa2Cu3O7−δ crystals and its effect on J
作者： A. Endo , H.S. Chauhan , Y. Shiohara
DOI: 10.1016/S0921-4534(96)00595-3
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摘要: Abstract In order to investigate the entrapment phenomenon of Y 2 BaCuO 5 (Y211) particles and its effect on properties critical current density ( J c ) in YBa Cu 3 O 7−δ (Y123) crystals, Pt-added Y123 crystals were grown by two different methods; constant undercooling method continuous cooling method, with top-seeded growth. It was revealed that amounts size distribution trapped Y211 solidified depended growth direction (〈001〉, 〈100〉) rate R as a function ΔT ). These phenomena could be at least qualitatively explained prevalent trapping/pushing theory. The values found vary their distributions, which turn conditions such and/or even when nominal composition kept constant. Considering or particle entrapment/pushing properties, it shown conventional methods (i.e. MPMG/QMG methods) favorable for entrapment, leading high values.
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