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Literature and experimental data about practical determination of phasecomposition and structure of BiHTSC ceramics from results of measurements oftemperature dependence of magnetic susceptibility are presented. It is shownthat Bi2223 to Bi2212 phases ratio, calculated by XRD-analysis results, doesnot correlate precisely with magnetic susceptibility - temperature dependence.Phase, which is present in smaller amount, especially Bi2212 phase with lowercritical temperature, appears less pronouncedly at the magnetic susceptibility- temperature dependence. Besides, limiting parts of Meissner effectmanifestation are peculiarities of contacts of superconducting grains.Different kinds of such contacts lead to lowering the critical temperaturetogether with conservation of narrow transition interval, to division oftransition into stages, and to increasing of transition interval. Amongnegative consequences of this influence there are hindrances in realization ofgrain oriented Bi ceramics synthesis scheme which imply powdering of samplesconsisting of chaotically evolved grains of Bi2223 phase, ordered placement ofobtained plate grains of this phase - for example, through vibrationcompacting, and sintering.

Characteristics of Bi(Pb)SrCaCuO superconducting ceramics samples properties by method of dynamic magnetic susceptibility measurements