Abstract
The effect of Pb content on the formation of the 2223 phase in stoichiometric compositions Bi 2−x Pb x Sr 2Ca 2Cu 3O y (0.1 ⩽ x ⩽ 0/4) is reported for a semi-wet route using [ xPbCO 3+2SrCO 3+2CaCO 3] precursors. Synthesis of high-purity 2223 phase free from Ca 2PbO 4 is reported for x=0.3 within a total heat treatment duration of 44 h with several intermediate crushings and grindings. By studying the sequence of solid state thermochemical reactions, it is shown that in the absence of Ca 2PbO 4, which plays a crucial role in accelerating the formation of 2223 phase, the conversion of 2212 into 2223 gets slowed down unless one resorts to intermediate crushing and grinding. The optimum Pb content for the formation of 2223 phase in Bi 2−x Pb x Sr 2Ca 2Cu 3O y compositions has been estimated to be in the range of 0.3 ⩽ x < 0.4
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
