Melting behavior of Ag-doped Bi-Pb-Sr-Ca-Cu-O system studied by containerless melting-solidification in high magnetic field

The melting behavior of Ag-doped Bi-Pb-Sr-Ca-Cu-O system was studied by using a containerless melting-solidification process in a magnetic field of 13.2 T to determine the formation and amount of liquid phase. Two obviously different melting behaviors have been recognized in 1%O₂-Ar. The first one occurs in a very narrow temperature range, in which the liquid phase can be maintained by the remaining solid phases from spreading and the system has a relatively high reactivity after solidification; the second one occurs at temperatures higher than this narrow temperature range, in which much liquid is lost by spreading and the system has a very poor reactivity after solidification.