Microstructure and phase development in melt processed Tl-1223 tapes
The effect of processing conditions on microstructure and phase development has been investigated for TlBi-1223 tapes made by a melt processing route. Increasing loss of crystallinity and phase decomposition into Tl-1212 and SrCaCu-oxides is seen for melt temperatures in the range 910-925°C. The 122...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
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1997
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| _version_ | 1826289698440478720 |
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| author | Moore, J Hyland, D Salter, C Eastell, C Fox, S Grovenor, C Goringe, M |
| author_facet | Moore, J Hyland, D Salter, C Eastell, C Fox, S Grovenor, C Goringe, M |
| author_sort | Moore, J |
| collection | OXFORD |
| description | The effect of processing conditions on microstructure and phase development has been investigated for TlBi-1223 tapes made by a melt processing route. Increasing loss of crystallinity and phase decomposition into Tl-1212 and SrCaCu-oxides is seen for melt temperatures in the range 910-925°C. The 1223 phase is reformed during a slow cool and subsequent annealing. It has been established that for samples of composition (Tl0.78Bi0.22)(Sr0.8Ba0.2) 2Ca2Cu3Oδ a melt temperature of around 9250C and a cooling rate of 20°C/h results in a much increased grain size of up to 60-70 μm. Use of fully reacted 1223 powder was found to result in a larger increase in grain size and better phase purity than a partly reacted precursor. © 1997 Elsevier Science B.V. |
| first_indexed | 2024-03-07T02:32:51Z |
| format | Journal article |
| id | oxford-uuid:a7d5a5c3-9d4a-4a6a-acd1-01ab6f4f1447 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T02:32:51Z |
| publishDate | 1997 |
| record_format | dspace |
| spelling | oxford-uuid:a7d5a5c3-9d4a-4a6a-acd1-01ab6f4f14472022-03-27T02:57:09ZMicrostructure and phase development in melt processed Tl-1223 tapesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a7d5a5c3-9d4a-4a6a-acd1-01ab6f4f1447Symplectic Elements at Oxford1997Moore, JHyland, DSalter, CEastell, CFox, SGrovenor, CGoringe, MThe effect of processing conditions on microstructure and phase development has been investigated for TlBi-1223 tapes made by a melt processing route. Increasing loss of crystallinity and phase decomposition into Tl-1212 and SrCaCu-oxides is seen for melt temperatures in the range 910-925°C. The 1223 phase is reformed during a slow cool and subsequent annealing. It has been established that for samples of composition (Tl0.78Bi0.22)(Sr0.8Ba0.2) 2Ca2Cu3Oδ a melt temperature of around 9250C and a cooling rate of 20°C/h results in a much increased grain size of up to 60-70 μm. Use of fully reacted 1223 powder was found to result in a larger increase in grain size and better phase purity than a partly reacted precursor. © 1997 Elsevier Science B.V. |
| spellingShingle | Moore, J Hyland, D Salter, C Eastell, C Fox, S Grovenor, C Goringe, M Microstructure and phase development in melt processed Tl-1223 tapes |
| title | Microstructure and phase development in melt processed Tl-1223 tapes |
| title_full | Microstructure and phase development in melt processed Tl-1223 tapes |
| title_fullStr | Microstructure and phase development in melt processed Tl-1223 tapes |
| title_full_unstemmed | Microstructure and phase development in melt processed Tl-1223 tapes |
| title_short | Microstructure and phase development in melt processed Tl-1223 tapes |
| title_sort | microstructure and phase development in melt processed tl 1223 tapes |
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