Синтез высокотемпературной сверхпроводящей керамики на основе системы Bi2O3-PbOSrO-CaO-CuO с использованием концентрированной солнечной энергии и исследование свойств

Аннотация

Inquiry of the Subject: Precursors Nominal Structures Bi, 7Pbo3Sr2Can.iCunOy (n = 2-5) on the Basis of the System Bi2O3-PbO-SrO-CaO-CuO. Superconducting Ceramics on the Base of the System Bi2O3-PbO-SrO-CaO-CuO. Aim of the Inquiry: the purpose of the given work was research of the mechanism of formation and properties of high-temperature superconducting materials and ceramics on the basis of the system Bi2O3-PbO-SrO-CaO-CuO, synthesized under the influence of a sunlight. Interrelation revealing between reception conditions precursors, the mechanism of formation of superconducting phases, and critical properties of the high-temperature superconducting ceramics. Method of Inquiry: the rentgenophases analysis, the electron-microscopic analysis, DTA, a method of hydrostatic weighing, micro hardness, temperature dependences of a magnetic susceptibility, the magnetic moment and electro resistance. The Achieved Results and Their Novelty: for the first time it was synthesised with utilize of the concentrated solar energy superconducting connection gomologics of some Bii 7Pbo 3Sr2Can.iCunOy(n = 2-5) and were investigated their mechanism of formation. And it is established that Increase of speed of interphase reactions turned out to be connected with a metastable initial condition. It is introduced corrective amendments in a structure of the private system Bi2O3-PbO-SrO-CaO-CuO, connected with incongruent character of formation of the phases 2234 and 2245. For the first time they were revealed steady (more than 7 years) new superconducting phases from the Hardware in an interval 110-150 K. It is established that the reason of their formation turned out to be formation of periodic defects in CuO2-planes in a direction [110]. Practical Value: can be used for synthesis of superconducting phases with the set temperatures of superconducting transition in an interval 95-150 К at Bij jPbojS^Can. iCunOy (n = 2-5). The developed method of reception of superconducting ceramics on the base of connections Bii ^Pbo sSbCan-iCunOy (n = 2-5) with Tc= 110-150 К can be the basis for creation of new technologies of reception of materials with special electric properties. The developed method is the contribution to development of power saving up technologies. Degree of Application and Economical Efficiency: the gotten results are plugged in a database on inorganic connections “The American Mineralogist crystal structure database”. Sphere of Usage: electronics, power.