Title :
Bi-Sr-Ca-Cu-O bulk superconductors with zero resistance above 110 K
Author :
Huang, H.S. ; Mao, S.N. ; Yao, Z.T. ; Liu, M.L. ; Ren, X.D. ; Zhang, K.S. ; Wu, Z.Y. ; Zhao, X. ; Liu, Y.-Z.
Author_Institution :
Tsinghua Univ., Beijing, China
fDate :
3/1/1989 12:00:00 AM
Abstract :
Optimized processing to obtain bulk superconductors in Bi-Sr-Ca-Cu-O system with zero resistance above 110 K has been studied. The superconducting path of the high-Tc phase has been realized in multiphase polycrystalline samples. The resistance of a typical sample reaches zero at 111 K. The usual resistive tail extended to 80 K has been successfully cut off. The importance of the role CuO played in the sintering reactions for the formation of the 110 K phase is discussed on the basis of the results of DTA (differential thermal analysis) and TG experiments
Keywords :
bismuth compounds; calcium compounds; high-temperature superconductors; sintering; strontium compounds; superconducting transition temperature; thermal analysis; 111 K; Bi-Sr-Ca-Cu-O bulk superconductors; DTA; TG experiments; differential thermal analysis; high temperature superconductivity; multiphase polycrystalline samples; optimised processing; resistive tail; sintering reactions; superconducting path; thermogravimetric study; transition temperature; zero resistance; Calcination; Chemistry; Conductivity; Electrical resistance measurement; Magnetic susceptibility; Physics; Superconducting materials; Superconducting transition temperature; Superconductivity; Tail;
Journal_Title :
Magnetics, IEEE Transactions on
