Effect of Sr and Al or Fe co-doping on the sinterability and conductivity of lanthanum silicateoxyapatite electrolytes for solid oxide fuel cells
The effect of co-doping of Sr and Al or Fe on the microstructure, sinterability and oxide-ion conductivity of lanthanum silicate oxyapatites is investigated in detail at 300–800 °C by the electrochemical impedance spectroscopy. The oxide-ion conductivity is 1.46 × 10−2 S cm−1 for La9.5Sr0.5Si5.5Fe0....
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| Format: | Journal Article |
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Elsevier Ltd
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/32514 |
| _version_ | 1848753684548157440 |
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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 | The effect of co-doping of Sr and Al or Fe on the microstructure, sinterability and oxide-ion conductivity of lanthanum silicate oxyapatites is investigated in detail at 300–800 °C by the electrochemical impedance spectroscopy. The oxide-ion conductivity is 1.46 × 10−2 S cm−1 for La9.5Sr0.5Si5.5Fe0.5O26.5 (LSSFO) and 1.34 × 10−2 S cm−1 at 800 °C for La9.5Sr0.5Si5.5Al0.5O26.5 (LSSAO), respectively, which is one order of magnitude higher than 6.16 × 10−3 S cm−1 measured on La9.67Si6O26.5 (LSO) oxyapatite under the identical test conditions. The grain bulk and grain boundary resistances of co-doped oxyapatite are significantly smaller than that of LSO oxyapatite, and decrease significantly with the increase of the sintering temperature. LSSFO and LSSAO also show significantly higher density as compared to that of LSO. The results indicate that co-doping of Sr and Al or Fe significantly improves the densification, sinterability and oxide-ion conductivity of lanthanum silicate oxyapatites. |
| first_indexed | 2025-11-14T08:28:26Z |
| format | Journal Article |
| id | curtin-20.500.11937-32514 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:28:26Z |
| publishDate | 2014 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-325142017-09-13T15:24:46Z Effect of Sr and Al or Fe co-doping on the sinterability and conductivity of lanthanum silicateoxyapatite electrolytes for solid oxide fuel cells Cao, X. Jiang, San Ping Solid oxide fuel cells' Electrolyte' Lanthanum silicate oxyapatite Co-doping' Oxide-ion conductivity The effect of co-doping of Sr and Al or Fe on the microstructure, sinterability and oxide-ion conductivity of lanthanum silicate oxyapatites is investigated in detail at 300–800 °C by the electrochemical impedance spectroscopy. The oxide-ion conductivity is 1.46 × 10−2 S cm−1 for La9.5Sr0.5Si5.5Fe0.5O26.5 (LSSFO) and 1.34 × 10−2 S cm−1 at 800 °C for La9.5Sr0.5Si5.5Al0.5O26.5 (LSSAO), respectively, which is one order of magnitude higher than 6.16 × 10−3 S cm−1 measured on La9.67Si6O26.5 (LSO) oxyapatite under the identical test conditions. The grain bulk and grain boundary resistances of co-doped oxyapatite are significantly smaller than that of LSO oxyapatite, and decrease significantly with the increase of the sintering temperature. LSSFO and LSSAO also show significantly higher density as compared to that of LSO. The results indicate that co-doping of Sr and Al or Fe significantly improves the densification, sinterability and oxide-ion conductivity of lanthanum silicate oxyapatites. 2014 Journal Article http://hdl.handle.net/20.500.11937/32514 10.1016/j.ijhydene.2014.09.092 Elsevier Ltd restricted |
| spellingShingle | Solid oxide fuel cells' Electrolyte' Lanthanum silicate oxyapatite Co-doping' Oxide-ion conductivity Cao, X. Jiang, San Ping Effect of Sr and Al or Fe co-doping on the sinterability and conductivity of lanthanum silicateoxyapatite electrolytes for solid oxide fuel cells |
| title | Effect of Sr and Al or Fe co-doping on the sinterability and conductivity of lanthanum silicateoxyapatite electrolytes for solid oxide fuel cells |
| title_full | Effect of Sr and Al or Fe co-doping on the sinterability and conductivity of lanthanum silicateoxyapatite electrolytes for solid oxide fuel cells |
| title_fullStr | Effect of Sr and Al or Fe co-doping on the sinterability and conductivity of lanthanum silicateoxyapatite electrolytes for solid oxide fuel cells |
| title_full_unstemmed | Effect of Sr and Al or Fe co-doping on the sinterability and conductivity of lanthanum silicateoxyapatite electrolytes for solid oxide fuel cells |
| title_short | Effect of Sr and Al or Fe co-doping on the sinterability and conductivity of lanthanum silicateoxyapatite electrolytes for solid oxide fuel cells |
| title_sort | effect of sr and al or fe co-doping on the sinterability and conductivity of lanthanum silicateoxyapatite electrolytes for solid oxide fuel cells |
| topic | Solid oxide fuel cells' Electrolyte' Lanthanum silicate oxyapatite Co-doping' Oxide-ion conductivity |
| url | http://hdl.handle.net/20.500.11937/32514 |