2017/06/14 by Irina A. Yurchenko, I. A. Yurchenko, Anatoliy V. Nemirovskiy +6
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Chemical and Physical Properties of Materials #FOS: Physical sciences #High-pressure geophysics and materials #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.1706.04420
14 pages, 9 figures
arxiv created 2017/06/14 · openalex publication_date 2017/06/14 · arxiv updated 2017/06/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Literature and experimental data about practical determination of phase composition and structure of BiHTSC ceramics from results of measurements of temperature dependence of magnetic susceptibility are presented. It is shown that Bi2223 to Bi2212 phases ratio, calculated by XRD-analysis results, does not correlate precisely with magnetic susceptibility - temperature dependence. Phase, which is present in smaller amount, especially Bi2212 phase with lower critical temperature, appears less pronouncedly at the magnetic susceptibility - temperature dependence. Besides, limiting parts of Meissner effect manifestation are peculiarities of contacts of superconducting grains. Different kinds of such contacts lead to lowering the critical temperature together with conservation of narrow transition interval, to division of transition into stages, and to increasing of transition interval. Among negative consequences of this influence there are hindrances in realization of grain oriented Bi ceramics synthesis scheme which imply powdering of samples consisting of chaotically evolved grains of Bi2223 phase, ordered placement of obtained plate grains of this phase - for example, through vibration compacting, and sintering.