The effect of manganese on phase formation and properties of Bi2212 ceramics

• Published in: Journal of materials science. Materials in electronics 2013-11, Vol.24 (11), p.4419-4426
• Main Authors: Boussouf, N., Mosbah, M. F.
• Format: Article
• Language: English
• Subjects: Applied sciences; BISMUTH OXIDE; CERAMICS; Characterization and Evaluation of Materials; Chemistry and Materials Science; Condensed matter: electronic structure, electrical, magnetic, and optical properties; COPPER OXIDE; Cross-disciplinary physics: materials science; rheology; ELECTRICAL CONDUCTIVITY; Electrical engineering. Electrical power engineering; Electrical resistivity; Electronics; Exact sciences and technology; Manganese; Materials; Materials Science; Microstructure; MICROSTRUCTURES; Optical and Electronic Materials; Other heat and thermomechanical treatments; Physics; Scanning electron microscopy; Superconducting materials (excluding high-tc compounds); SUPERCONDUCTIVITY; SUPERCONDUCTORS; Surface layer; Texture; TEXTURES; Treatment of materials and its effects on microstructure and properties
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-013-1419-4

In this work we present a systematic study of the Mn influence superconducting properties. Attempts have been made to identify the optimum inclusion of MnO 2 in Bi 2 Sr 2 Ca 1 Cu 2 O 8+δ superconductors. The phase formation, texture and grain alignments were analysed by X-ray diffraction, scanning electron microscopy, energy dispersive spectrometry (SEM, EDS) and electrical resistivity. It was found that Mn addition has affected the formation of the desired Bi-2212 phase and the microstructure of these samples thereby influencing on the resistivity. The resistivity of all the Bi 2 Sr 2 Mn x Ca 1 Cu 2 O 8+δ samples shows metallic behaviour. It reveals that, 4 wt% composite exhibits a better superconducting property in comparison with pure BSCCO. It has been observed that Mn residing at the grain boundary of BSCCO matrix influences the tailing region with having significant change in the critical temperature. The microstructures observed by SEM indicate segregation of an additional phase. The EDS revealed that this phase is stoichiometric. The results show that the doping leads to a reduction of cell volume as well as the c axis.