Preparation and superconducting properties of high-quality Bi-2212 ceramics

Article Article scientifique Article Preparation and superconducting properties of high-quality Bi-2212 ceramics eng 1994 author Tsukamoto Takehiko 62346 author Triscone Gilles 24120 author Genoud Jean-Yves 27984 author Wang Keqin 27742 author Janod Etienne Daniel André 28856 author Junod Alain 24686 author Muller Jean 24994 225-229 10.1016/0925-8388(94)91103-7 0925-8388 http://linkinghub.elsevier.com/retrieve/pii/0925838894911037 High-quality Bi-2212 ceramic samples were obtained by a solid-state reaction method. At the starting composition Bi2.12Sr1.90Ca1.02Cu1.96Oy, X-ray diffraction, optical micrographs and scanning electron microscopy investigations show that the level of impurity phases is less than 1% by volume. Synthesis at a few degrees below the melting point favours grain growth. A final annealing treatment at controlled temperature and oxygen pressure, followed by rapid quenching, yields sharp superconducting transitions, as observed by measurement of the a.c. susceptibility and Meissner effect, and specific heat experiments. The Meissner fraction in 2 mT approaches 50%. Dewey 500.2 33 Département de physique de la matière quantique 131 false Journal of Alloys and Compounds 209 1-2 77f14b72-e622-4d1e-a956-6ed6c6e12829 Article (Published version) Restricted Tsukamoto_JAC_1994209225.pdf 483947 application/pdf restrictedAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

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Preparation and superconducting properties of high-quality Bi-2212 ceramics	Journal of Alloys and Compounds			1994	399	0

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Wang, Keqin