THE DEPENDENCE OF ELECTRICAL AND STRUCTURAL PROPERTIES WITH AGING OF SUPERCONDUCTOR CERAMICS

Resumo

This work presents the results of electrical resistance measurements as a function of temperature and x-ray diffractometry for 2223 superconductor pellets (critical temperature at around 110 K), after keeping them for 14 years under normal ambient conditions (25ºC, 1atm and 50-70% humidity). The pellets were obtained after pressing a precursor powder previously prepared by a chemical process. The results indicate that the samples obtained from the chemical process are very stable, which represents extremely important results for technological applications.