Method of manufacturing a powder of Bi-based superconductive oxide containing lead and method of manufacturing of a sintered body therefrom.

摘要

A Ca carbonate powder, a Sr carbonate powder, and a Cu oxide powder are mixed in predetermined proportions, and sintered at a first predetermined temperature into a Ca-Sr-Cu-O oxide sintered body. A Bi oxide powder and a Pb oxide powder are mixed in predetermined proportions, and are sintered at a second predetermined temperature into a Bi-Pb-O oxide sintered body. The obtained Ca-Sr-Cu-O oxide sintered body and Bi-Pb-O oxide sintered body are crushed, and the resulting Ca-Sr-Cu-O oxide powder and Bi-Pb-O oxide powder are mixed in predetermined proportions. The resulting mixed powder is sintered at a third predetermined temperature into a Bi-Pb-Sr-Ca-Cu-O superconductive oxide sintered body, which is crushed into a powder of a Bi-based superconductive oxide containing Pb. A sintered body of the Bi-based superconductive oxide containing Pb is formed from the Bi-based superconductive oxide powder. According to another method, a sintered body of a Bi-based superconductive oxide containing Pb may be manufactured such that a Bi oxide powder and a Pb oxide powder are mixed in predetermined proportions, and sintered at a predetermined temperature into a Bi-Pb-O oxide sintered body. The Bi-Pb-O oxide sintered body is crushed into a powder, followed by mixing the powder with a Bi-Sr-Ca-Cu-O oxide powder in predetermined proportions into a mixed powder. The above Bi-based superconductive oxide sintered body is formed from the last-mentioned mixed powder.