Sinterability and conductivity of barium doped aluminium lanthanum oxyapatite La9.5Ba0.5Si5.5Al0.5O26.5 electrolyte of solid oxide fuel cells
Apatite ceramics are interesting alternative solid oxide fuel cells (SOFCs) electrolytes because of their open structure for the transportation of oxide ions and their good chemical stability. This study reports the influence of barium doping on the microstructure, sinterability and oxide conductivi...
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| Format: | Journal Article |
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Elsevier B.V.
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/14696 |
| _version_ | 1848748692333395968 |
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| author | Cao, X. Jiang, San Ping |
| author_facet | Cao, X. Jiang, San Ping |
| author_sort | Cao, X. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Apatite ceramics are interesting alternative solid oxide fuel cells (SOFCs) electrolytes because of their open structure for the transportation of oxide ions and their good chemical stability. This study reports the influence of barium doping on the microstructure, sinterability and oxide conductivity properties of the aluminium lanthanum oxyapatite La9.5Ba0.5Si5.5Al0.5O26.5. SEM results show that lanthanum substitution with barium improves the sinterability of apatite ceramics. The barium doping also enhances the conductivity of the aluminium lanthanum silicates. The oxygen ion conductivity of La9.5Ba0.5Si5.5Al0.5O26.5 sintered at 1600°C is 2.21 × 10−2 S cm−1 at 800°C, higher than 9.81 × 10−3 S cm−1 of La10Si5AlO26.5 sample prepared under the same conditions. The results in the present study demonstrate that doping Ba on the La site for aluminium lanthanum oxyapatite reduces the sintering temperature and improves the ion conductivity. The enhancement of Ba dopant is mainly on the improvement of the densification and thus substantially reduced grain boundary resistance of aluminium lanthanum oxyapatite particularly at low temperatures. |
| first_indexed | 2025-11-14T07:09:05Z |
| format | Journal Article |
| id | curtin-20.500.11937-14696 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:09:05Z |
| publishDate | 2012 |
| publisher | Elsevier B.V. |
| recordtype | eprints |
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| spelling | curtin-20.500.11937-146962017-09-13T15:59:27Z Sinterability and conductivity of barium doped aluminium lanthanum oxyapatite La9.5Ba0.5Si5.5Al0.5O26.5 electrolyte of solid oxide fuel cells Cao, X. Jiang, San Ping Barium doping Aluminium lanthanum apatite Electrolyte Solid oxide fuel cells Oxide ion conductivity Apatite ceramics are interesting alternative solid oxide fuel cells (SOFCs) electrolytes because of their open structure for the transportation of oxide ions and their good chemical stability. This study reports the influence of barium doping on the microstructure, sinterability and oxide conductivity properties of the aluminium lanthanum oxyapatite La9.5Ba0.5Si5.5Al0.5O26.5. SEM results show that lanthanum substitution with barium improves the sinterability of apatite ceramics. The barium doping also enhances the conductivity of the aluminium lanthanum silicates. The oxygen ion conductivity of La9.5Ba0.5Si5.5Al0.5O26.5 sintered at 1600°C is 2.21 × 10−2 S cm−1 at 800°C, higher than 9.81 × 10−3 S cm−1 of La10Si5AlO26.5 sample prepared under the same conditions. The results in the present study demonstrate that doping Ba on the La site for aluminium lanthanum oxyapatite reduces the sintering temperature and improves the ion conductivity. The enhancement of Ba dopant is mainly on the improvement of the densification and thus substantially reduced grain boundary resistance of aluminium lanthanum oxyapatite particularly at low temperatures. 2012 Journal Article http://hdl.handle.net/20.500.11937/14696 10.1016/j.jallcom.2012.01.119 Elsevier B.V. restricted |
| spellingShingle | Barium doping Aluminium lanthanum apatite Electrolyte Solid oxide fuel cells Oxide ion conductivity Cao, X. Jiang, San Ping Sinterability and conductivity of barium doped aluminium lanthanum oxyapatite La9.5Ba0.5Si5.5Al0.5O26.5 electrolyte of solid oxide fuel cells |
| title | Sinterability and conductivity of barium doped aluminium lanthanum oxyapatite La9.5Ba0.5Si5.5Al0.5O26.5 electrolyte of solid oxide fuel cells |
| title_full | Sinterability and conductivity of barium doped aluminium lanthanum oxyapatite La9.5Ba0.5Si5.5Al0.5O26.5 electrolyte of solid oxide fuel cells |
| title_fullStr | Sinterability and conductivity of barium doped aluminium lanthanum oxyapatite La9.5Ba0.5Si5.5Al0.5O26.5 electrolyte of solid oxide fuel cells |
| title_full_unstemmed | Sinterability and conductivity of barium doped aluminium lanthanum oxyapatite La9.5Ba0.5Si5.5Al0.5O26.5 electrolyte of solid oxide fuel cells |
| title_short | Sinterability and conductivity of barium doped aluminium lanthanum oxyapatite La9.5Ba0.5Si5.5Al0.5O26.5 electrolyte of solid oxide fuel cells |
| title_sort | sinterability and conductivity of barium doped aluminium lanthanum oxyapatite la9.5ba0.5si5.5al0.5o26.5 electrolyte of solid oxide fuel cells |
| topic | Barium doping Aluminium lanthanum apatite Electrolyte Solid oxide fuel cells Oxide ion conductivity |
| url | http://hdl.handle.net/20.500.11937/14696 |