AN IMPROVED ROUTE TO THE SYNTHESIS OF SUPERCONDUCTING COPPER OXYFLUORIDES SR(2-X)A(X)CUO(2)F(2+DELTA) (A=CA, BA) USING TRANSITION-METAL DIFLUORIDES AS FLUORINATING REAGENTS
We report here a simple and efficient synthetic route to high temperature superconducting oxyfluorides. Solid phase fluorination of Sr2-xAxCuO3 (ACa, 0 ≤ x ≤ 2.0; ABa, 0 ≤ x ≤ 0.6) with the transition metal difluorides, CuF2, ZnF2, AgF2, NiF2, at relatively low temperatures (225-250°C) produces supe...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
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1995
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| _version_ | 1826278703181594624 |
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| author | Slater, P Hodges, J Francesconi, M Edwards, P Greaves, C Gameson, I Slaski, M |
| author_facet | Slater, P Hodges, J Francesconi, M Edwards, P Greaves, C Gameson, I Slaski, M |
| author_sort | Slater, P |
| collection | OXFORD |
| description | We report here a simple and efficient synthetic route to high temperature superconducting oxyfluorides. Solid phase fluorination of Sr2-xAxCuO3 (ACa, 0 ≤ x ≤ 2.0; ABa, 0 ≤ x ≤ 0.6) with the transition metal difluorides, CuF2, ZnF2, AgF2, NiF2, at relatively low temperatures (225-250°C) produces superconducting Sr2-xAxCuO2F2+δ with a maximum Tc of 64 K (for ABa, x = 0.6). This simple preparation route eliminates the need for F2 gas, and at the same time produces negligible (Sr/A)F2 impurity, unlike the corresponding fluorination with NH4F. Using this route the synthesis of the oxyfluoride, Ba2CuO2F2+δ, is also reported for the first time. These studies and the examination of the fluorination of other cuprate systems have shown that this is a powerful and versatile fluorination route. © 1995. |
| first_indexed | 2024-03-06T23:47:54Z |
| format | Journal article |
| id | oxford-uuid:7195585b-8a7f-43af-bcb8-249b5da1c7d0 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:47:54Z |
| publishDate | 1995 |
| record_format | dspace |
| spelling | oxford-uuid:7195585b-8a7f-43af-bcb8-249b5da1c7d02022-03-26T19:44:34ZAN IMPROVED ROUTE TO THE SYNTHESIS OF SUPERCONDUCTING COPPER OXYFLUORIDES SR(2-X)A(X)CUO(2)F(2+DELTA) (A=CA, BA) USING TRANSITION-METAL DIFLUORIDES AS FLUORINATING REAGENTSJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7195585b-8a7f-43af-bcb8-249b5da1c7d0EnglishSymplectic Elements at Oxford1995Slater, PHodges, JFrancesconi, MEdwards, PGreaves, CGameson, ISlaski, MWe report here a simple and efficient synthetic route to high temperature superconducting oxyfluorides. Solid phase fluorination of Sr2-xAxCuO3 (ACa, 0 ≤ x ≤ 2.0; ABa, 0 ≤ x ≤ 0.6) with the transition metal difluorides, CuF2, ZnF2, AgF2, NiF2, at relatively low temperatures (225-250°C) produces superconducting Sr2-xAxCuO2F2+δ with a maximum Tc of 64 K (for ABa, x = 0.6). This simple preparation route eliminates the need for F2 gas, and at the same time produces negligible (Sr/A)F2 impurity, unlike the corresponding fluorination with NH4F. Using this route the synthesis of the oxyfluoride, Ba2CuO2F2+δ, is also reported for the first time. These studies and the examination of the fluorination of other cuprate systems have shown that this is a powerful and versatile fluorination route. © 1995. |
| spellingShingle | Slater, P Hodges, J Francesconi, M Edwards, P Greaves, C Gameson, I Slaski, M AN IMPROVED ROUTE TO THE SYNTHESIS OF SUPERCONDUCTING COPPER OXYFLUORIDES SR(2-X)A(X)CUO(2)F(2+DELTA) (A=CA, BA) USING TRANSITION-METAL DIFLUORIDES AS FLUORINATING REAGENTS |
| title | AN IMPROVED ROUTE TO THE SYNTHESIS OF SUPERCONDUCTING COPPER OXYFLUORIDES SR(2-X)A(X)CUO(2)F(2+DELTA) (A=CA, BA) USING TRANSITION-METAL DIFLUORIDES AS FLUORINATING REAGENTS |
| title_full | AN IMPROVED ROUTE TO THE SYNTHESIS OF SUPERCONDUCTING COPPER OXYFLUORIDES SR(2-X)A(X)CUO(2)F(2+DELTA) (A=CA, BA) USING TRANSITION-METAL DIFLUORIDES AS FLUORINATING REAGENTS |
| title_fullStr | AN IMPROVED ROUTE TO THE SYNTHESIS OF SUPERCONDUCTING COPPER OXYFLUORIDES SR(2-X)A(X)CUO(2)F(2+DELTA) (A=CA, BA) USING TRANSITION-METAL DIFLUORIDES AS FLUORINATING REAGENTS |
| title_full_unstemmed | AN IMPROVED ROUTE TO THE SYNTHESIS OF SUPERCONDUCTING COPPER OXYFLUORIDES SR(2-X)A(X)CUO(2)F(2+DELTA) (A=CA, BA) USING TRANSITION-METAL DIFLUORIDES AS FLUORINATING REAGENTS |
| title_short | AN IMPROVED ROUTE TO THE SYNTHESIS OF SUPERCONDUCTING COPPER OXYFLUORIDES SR(2-X)A(X)CUO(2)F(2+DELTA) (A=CA, BA) USING TRANSITION-METAL DIFLUORIDES AS FLUORINATING REAGENTS |
| title_sort | improved route to the synthesis of superconducting copper oxyfluorides sr 2 x a x cuo 2 f 2 delta a ca ba using transition metal difluorides as fluorinating reagents |
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