Correlation of structure, electrical conductivity, and oxygen permeability in strontium cobaltite ceramic membranes
An attempt has been made to synthesize a highly stable oxygen-deficient strontium cobaltite {SrCoO3-δ (δ = 5/16)} by decomposition of the sol-gel derived oxalate at 1000°C for 10 h in air. The product corresponds to the rhombohedral Sr6Co5O15 (93 wt%) and spinel cubic Co3O4 (7 wt%) phases at room te...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2020-10-01
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| Series: | Journal of Asian Ceramic Societies |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/21870764.2020.1840699 |
| _version_ | 1818946851265576960 |
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| author | Shivendra Kumar Jaiswal Vijay Kumar Kashyap Jitendra Kumar |
| author_facet | Shivendra Kumar Jaiswal Vijay Kumar Kashyap Jitendra Kumar |
| author_sort | Shivendra Kumar Jaiswal |
| collection | DOAJ |
| description | An attempt has been made to synthesize a highly stable oxygen-deficient strontium cobaltite {SrCoO3-δ (δ = 5/16)} by decomposition of the sol-gel derived oxalate at 1000°C for 10 h in air. The product corresponds to the rhombohedral Sr6Co5O15 (93 wt%) and spinel cubic Co3O4 (7 wt%) phases at room temperature but displays the perovskite-type cubic structure with a ~ 3.953 Å at 900°C. It serves as an excellent material for separation of oxygen from the air and exhibits high oxygen permeability (JO2) of 3.0 ml/cm2.min at 1000°C for a 1.0 mm thick membrane. The activation energy of the process is found as 22 kJ/mol. Further, both JO2 and conductivity (σ) reveal good correlation with phases present at different temperatures. The system shows (i) reversible phase separation following the reaction SrCoO3-δ →Sr6Co5O15 + Co3O4 and (ii) hysteresis in oxygen permeability upon cooling but remains reusable. |
| first_indexed | 2024-12-20T08:21:34Z |
| format | Article |
| id | doaj.art-ddf00eb238e943148eba4f3abd48f3f1 |
| institution | Directory Open Access Journal |
| issn | 2187-0764 |
| language | English |
| last_indexed | 2024-12-20T08:21:34Z |
| publishDate | 2020-10-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Asian Ceramic Societies |
| spelling | doaj.art-ddf00eb238e943148eba4f3abd48f3f12022-12-21T19:46:59ZengTaylor & Francis GroupJournal of Asian Ceramic Societies2187-07642020-10-01841018102610.1080/21870764.2020.18406991840699Correlation of structure, electrical conductivity, and oxygen permeability in strontium cobaltite ceramic membranesShivendra Kumar Jaiswal0Vijay Kumar Kashyap1Jitendra Kumar2National Institute of Technology PatnaCSJM UniversityIndian Institute of Technology KanpurAn attempt has been made to synthesize a highly stable oxygen-deficient strontium cobaltite {SrCoO3-δ (δ = 5/16)} by decomposition of the sol-gel derived oxalate at 1000°C for 10 h in air. The product corresponds to the rhombohedral Sr6Co5O15 (93 wt%) and spinel cubic Co3O4 (7 wt%) phases at room temperature but displays the perovskite-type cubic structure with a ~ 3.953 Å at 900°C. It serves as an excellent material for separation of oxygen from the air and exhibits high oxygen permeability (JO2) of 3.0 ml/cm2.min at 1000°C for a 1.0 mm thick membrane. The activation energy of the process is found as 22 kJ/mol. Further, both JO2 and conductivity (σ) reveal good correlation with phases present at different temperatures. The system shows (i) reversible phase separation following the reaction SrCoO3-δ →Sr6Co5O15 + Co3O4 and (ii) hysteresis in oxygen permeability upon cooling but remains reusable.http://dx.doi.org/10.1080/21870764.2020.1840699strontium cobaltiteperovskite-type oxidesstabilityoxygen permeationconductivity |
| spellingShingle | Shivendra Kumar Jaiswal Vijay Kumar Kashyap Jitendra Kumar Correlation of structure, electrical conductivity, and oxygen permeability in strontium cobaltite ceramic membranes Journal of Asian Ceramic Societies strontium cobaltite perovskite-type oxides stability oxygen permeation conductivity |
| title | Correlation of structure, electrical conductivity, and oxygen permeability in strontium cobaltite ceramic membranes |
| title_full | Correlation of structure, electrical conductivity, and oxygen permeability in strontium cobaltite ceramic membranes |
| title_fullStr | Correlation of structure, electrical conductivity, and oxygen permeability in strontium cobaltite ceramic membranes |
| title_full_unstemmed | Correlation of structure, electrical conductivity, and oxygen permeability in strontium cobaltite ceramic membranes |
| title_short | Correlation of structure, electrical conductivity, and oxygen permeability in strontium cobaltite ceramic membranes |
| title_sort | correlation of structure electrical conductivity and oxygen permeability in strontium cobaltite ceramic membranes |
| topic | strontium cobaltite perovskite-type oxides stability oxygen permeation conductivity |
| url | http://dx.doi.org/10.1080/21870764.2020.1840699 |
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