Open AccessLOW-RESISTANCE Bi/Pb CERAMICS CONTAINING Ts = 295К-315K PHASES SYNTHESIZED IN A SOLAR FURNACE (PARKENT)
Publication year - 2020
Publication title -
himiâ i himičeskaâ tehnologiâ/chemistry and chemical engineering
Language(s) - English
Resource type - Journals
eISSN - 2181-1121
pISSN - 1992-9498
DOI - 10.51348/ulje2155
Subject(s) - ceramic , materials science , superconductivity , semiconductor , homologous series , quenching (fluorescence) , thermal conduction , chemical engineering , electrical resistivity and conductivity , composite material , condensed matter physics , optoelectronics , crystallography , chemistry , optics , physics , electrical engineering , engineering , fluorescence
The aim of this work is to obtain bulk textured superconducting ceramics based on glass-crystalline precursors of the Bi1.7Pb0.3Sr2Ca(n-1)CunOy (n=5-9) series. Technologies for obtaining superconducting materials are presented. The advantages of melt methods and “Super Fast Aloys Quenching–T” technology is shown. Compositions, methods of synthesis and study of properties of precursors and ceramics obtained by solar energy are presented. The interrelation of the morphology of glass-crystalline precursors and superconducting ceramics based on them is revealed. It is shown that nano-sized nuclei are the basis on which superconducting phases with Ts = 295-315K are formed as a result of the peritectic reaction. The mechanism of conduction in nanostructured layered ceramics containing higher superconducting phases is proposed. The contribution tothe conductivity of low-resistance ceramics is assumed due to the mutual influence of Bi / Pb homologous phases, which represent a “quasi” heterogeneous system by analogy with the mechanism proposed by Rashba for heterophase semiconductors.