STUDY OF THE CRYSTALLIZATION PROCESS IN BI2-XPBXSR2CA2CU3O10-Y GLASS SYSTEMS - OPTICAL POLARIZED-LIGHT MICROSCOPY, ELECTRICAL AND MAGNETIC-PROPERTIES

被引:8
作者
CLOOTS, R
ROMAIN, AC
RULMONT, A
DIKO, P
DUVIGNEAUD, PH
HANNAY, C
GILLET, F
GODELAINE, PA
AUSLOOS, M
机构
[1] FREE UNIV BRUSSELS,SERV PHYS SOLIDES,B-1050 BRUSSELS,BELGIUM
[2] FREE UNIV BRUSSELS,SERV CHIM ANALYT & IND,B-1050 BRUSSELS,BELGIUM
[3] UNIV LIEGE,MONTEFIORE ELECT INST,SUPRAS,B-4000 LIEGE,BELGIUM
[4] UNIV LIEGE,INST PHYS,SUPRAS,B-4000 LIEGE,BELGIUM
[5] SLOVAK ACAD SCI,INST EXPTL PHYS,CS-04353 KOSICE,SLOVAKIA
关键词
D O I
10.1088/0953-2048/6/12/008
中图分类号
O59 [应用物理学];
学科分类号
摘要
Synthesis of Bi2-xPbxSr2Ca2Cu3O10-y (x = 0 and x = 0.3) has been performed using the glass recrystallization route technique. After splat quenching, the samples were annealed at 820, 850 or 870-degrees-C for 96 or 144 h (with one intermediary grinding). High-resolution polarization micrographs and electrical (and magnetic susceptibility) measurements have been taken. Various growth mechanisms can thus be checked, and the physical properties are studied in relation to the microstructure. It is found that the 2223 phase does not crystallize directly from the amorphous one but results from a dissolution-reprecipitation process. The stability of the 2212 phase is emphasized. The 2201 phase precipitates at high temperature and rapidly reacts with the melt to form the 2223 phase. The kinetics of the lead-substituted sample seems to be controlled by the Ca2PbO4 phase. which acts as a flux.
引用
收藏
页码:850 / 857
页数:8
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