Influence of partial oxygen pressure on the processing of Ag-sheathed BSCCO-2223 tapes
Influence of partial oxygen pressure on the processing of Ag-sheathed BSCCO-2223 tapes
The effect of sintering in various oxygen atmospheres on transport Jc has been investigated. The results of the peak Jc with total sintering time are presented for each partial oxygen pressure (PO2 = 0.04, 0.075, 0.21). Two important processing parameters of tapes were adjusted to ensure a fair comparison of each PO2. Firstly, as the melting temperature of BSCCO decreases with decreasing PO2, it was necessary to alter the sintering temperatures to maintain the same subcooling for each PO2. Secondly, the first and second intermediate rollings of the tapes were performed when there were equal amounts of 2223 phase. The peaks in Jc against total sintering time occurred at 200 h for PO2 = 0.21, 45 h for PO2 = 0.075, and 90 h for PO2 = 0.04. This relates to the stability range and the incubation time of BSCCO-2223 in PO2 and could be an important tool to reduce the long processing time of optimized tapes.
BSCCO-2223, partial oxygen pressure, 2223 conversion rate
601-604
Penny, M.
ae96526a-129d-410a-b14f-fe1ffd628f12
Feltham, S.
a386928f-6748-44c2-9644-2ed7e96697a1
Beduz, C.
15245681-77b5-4b29-a8fc-23296f13bc57
Yang, Y.
f2e3049f-3750-4497-ba13-7a9072f4b562
Scurlock, R.
668b2702-9535-4326-b42e-88513fadfdb1
Wroe, R.
71448e85-076a-47ba-95e4-0bafc6b2c1b0
1997
Penny, M.
ae96526a-129d-410a-b14f-fe1ffd628f12
Feltham, S.
a386928f-6748-44c2-9644-2ed7e96697a1
Beduz, C.
15245681-77b5-4b29-a8fc-23296f13bc57
Yang, Y.
f2e3049f-3750-4497-ba13-7a9072f4b562
Scurlock, R.
668b2702-9535-4326-b42e-88513fadfdb1
Wroe, R.
71448e85-076a-47ba-95e4-0bafc6b2c1b0
Penny, M., Feltham, S., Beduz, C., Yang, Y., Scurlock, R. and Wroe, R.
(1997)
Influence of partial oxygen pressure on the processing of Ag-sheathed BSCCO-2223 tapes.
Cryogenics, 37 (10), .
(doi:10.1016/S0011-2275(97)00060-X).
Abstract
The effect of sintering in various oxygen atmospheres on transport Jc has been investigated. The results of the peak Jc with total sintering time are presented for each partial oxygen pressure (PO2 = 0.04, 0.075, 0.21). Two important processing parameters of tapes were adjusted to ensure a fair comparison of each PO2. Firstly, as the melting temperature of BSCCO decreases with decreasing PO2, it was necessary to alter the sintering temperatures to maintain the same subcooling for each PO2. Secondly, the first and second intermediate rollings of the tapes were performed when there were equal amounts of 2223 phase. The peaks in Jc against total sintering time occurred at 200 h for PO2 = 0.21, 45 h for PO2 = 0.075, and 90 h for PO2 = 0.04. This relates to the stability range and the incubation time of BSCCO-2223 in PO2 and could be an important tool to reduce the long processing time of optimized tapes.
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Published date: 1997
Keywords:
BSCCO-2223, partial oxygen pressure, 2223 conversion rate
Identifiers
Local EPrints ID: 21292
URI: http://eprints.soton.ac.uk/id/eprint/21292
ISSN: 0011-2275
PURE UUID: abaa0c17-3a8b-456d-81ed-d267b1c505c7
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Date deposited: 17 Nov 2006
Last modified: 11 Nov 2024 19:54
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Contributors
Author:
M. Penny
Author:
S. Feltham
Author:
C. Beduz
Author:
Y. Yang
Author:
R. Scurlock
Author:
R. Wroe
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