Superconductors superconductor line Bi1,7Pb0,3Sr2Ca(n-1)CunO10-δ(n=5,9,12,19) microstructure, phases compositions, critical temperature to superconducting state transition Tc was investigated. Precursors for superconductors phases synthesis by solar energy have been elaborated. The formation of superconducting homologous phases with a superconducting transition temperature in the range of 240-270 K is determine
