SYNTHESIS AND MICROSTRUCTURE OF BI1.8PB0.4SR2CA2.2CU3OX OBTAINED FROMFREEZE-DRIED PRECURSORS

Authors
KRISHNARAJ P LELOVIC M EROR NG BALACHANDRAN U
Citation
P. Krishnaraj et al., SYNTHESIS AND MICROSTRUCTURE OF BI1.8PB0.4SR2CA2.2CU3OX OBTAINED FROMFREEZE-DRIED PRECURSORS, Physica. C, Superconductivity, 215(3-4), 1993, pp. 305-312
Citations number
20
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
215
Issue
3-4
Year of publication
1993
Pages
305 - 312
Database
ISI
SICI code
0921-4534(1993)215:3-4<305:SAMOBO>2.0.ZU;2-E
Abstract
Amorphous precursor powders for Bi1.8Pb0.4Sr2Ca2.2Cu3Ox(2223) were pre pared by a freeze-drying process incorporating a splat-freezing step. The critical parameters affecting the drying process are discussed. Th e freeze-dried powders have high reactivity and led to essentially pha se pure 2223 phase formation in 12 h. The microstructure of the 2223 s hows fine particles of 2201 in the matrix. The grain boundaries of the 2223 grains appear to be clean, leading to good intergrain contact be tween 2223 grains.