EFFECT OF CALCINING CONDITIONS ON THE FORMATION OF THE HIGH-T(C) BI-PB-SR-CA-CU-O PHASE

Authors
KAO CH CHIU YD DUNG SL LEE LC LEI TS WU MK
Citation
Ch. Kao et al., EFFECT OF CALCINING CONDITIONS ON THE FORMATION OF THE HIGH-T(C) BI-PB-SR-CA-CU-O PHASE, Materials letters, 20(1-2), 1994, pp. 83-86
Citations number
15
Categorie Soggetti
Material Science","Physics, Applied
Journal title
Materials letters → ACNP
ISSN journal
0167577X
Volume
20
Issue
1-2
Year of publication
1994
Pages
83 - 86
Database
ISI
SICI code
0167-577X(1994)20:1-2<83:EOCCOT>2.0.ZU;2-O
Abstract
Starting BPSCCO powders with various amounts of the high-T(c) phase we re prepared by different calcining conditions. A low-T(c) phase was do minant in a powder calcined at 800-degrees-C for 10 h along with a sma ll amount of a very low-T(c) phase and some non-superconducting phases but no high-T(c) phase was present. When this powder was reheated at 853-degrees-C, the high-T(c) phase was formed. The volume fraction of the high-T(c) phase increased with increasing reheating time at 853-de grees-C. On the other hand, T(c) of the sample calcined at 800-degrees -C for 10 h and reheated at 853-degrees-C for 24 h and then sintered a t 835-degrees-C for additional 48 h was 104 K with a sharp transition.