Preparation of Bi2Sr2CaCu2Ox-SrZrO3 composites from freeze-dried mixtures by melt processingстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Bi2Sr2CaCu2Ox and Bi2Sr2CaCu2Ox + 0.2SrZrO(3) powders synthesized via freeze-drying were used to prepare bulk ceramics by melt casting into a preheated mold. Porosity of the materials, resulting from the freeze-drying step, can be notably reduced by repeat melting followed by quenching. The ceramics contain small, 0.1-0.3 mu m in size, uniformly distributed SrZrO3 particles. The SrZrO3-superconductor interface is sharp, with no evidence for chemical reaction. Precrystallization ensures a significant increase in j(c).