Materials design for ceramic oxygen permeation membranes : single perovskite vs. single/double perovskite composite, a case study of tungsten-doped barium strontium cobalt ferrite
Pure oxygen is an important raw material with many important applications. The production of oxygen via a conducting ceramic membrane is a new, cost-effective and advanced technology with the advantage of continuous oxygen production. The perovskite-type mixed-conducting oxide Ba0.5Sr0.5Co0.8Fe0.2O3...
| Main Authors: | , , , , , , , |
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| Formato: | Journal Article |
| Idioma: | English |
| Publicado: |
2020
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| Acceso en liña: | https://hdl.handle.net/10356/139171 |
| _version_ | 1826123839613960192 |
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| author | Zhang, Junxing Zhang, Zhenbao Chen, Yubo Xu, Xiaomin Zhou, Chuan Yang, Guangming Zhou, Wei Shao, Zongping |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Zhang, Junxing Zhang, Zhenbao Chen, Yubo Xu, Xiaomin Zhou, Chuan Yang, Guangming Zhou, Wei Shao, Zongping |
| author_sort | Zhang, Junxing |
| collection | NTU |
| description | Pure oxygen is an important raw material with many important applications. The production of oxygen via a conducting ceramic membrane is a new, cost-effective and advanced technology with the advantage of continuous oxygen production. The perovskite-type mixed-conducting oxide Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) exhibits superb oxygen permeability, yet it suffers from poor phase stability. In this study, we aim to improve the operational stability of the BSCF membrane by introducing a high-valence W6+ ion as a B-site dopant. Its effect on the phase composition, structure, structural stability, electrical conductivity, oxygen transfer rate and oxygen permeability as a membrane is systematically investigated. Upon the partial substitution of cobalt and iron in the W6+-doped BSCF, single/double perovskite composites are formed instead of single perovskite composites. Remarkably, the formation of the single/double perovskite composites enhances the oxygen permeation stability without obviously compromising the oxygen permeability. Among the various materials, the composite with the nominal composition of Ba0.5Sr0.5Co0.8Fe0.1W0.1O3-δ shows the best performance in terms of stability and oxygen permeability. These findings thus introduce a new way to design conducting ceramic membranes for oxygen separation at high temperatures. |
| first_indexed | 2024-10-01T06:11:13Z |
| format | Journal Article |
| id | ntu-10356/139171 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:11:13Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1391712020-06-01T10:13:54Z Materials design for ceramic oxygen permeation membranes : single perovskite vs. single/double perovskite composite, a case study of tungsten-doped barium strontium cobalt ferrite Zhang, Junxing Zhang, Zhenbao Chen, Yubo Xu, Xiaomin Zhou, Chuan Yang, Guangming Zhou, Wei Shao, Zongping School of Materials Science & Engineering Engineering::Materials Oxygen Permeation Membrane Perovskite Oxides Pure oxygen is an important raw material with many important applications. The production of oxygen via a conducting ceramic membrane is a new, cost-effective and advanced technology with the advantage of continuous oxygen production. The perovskite-type mixed-conducting oxide Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) exhibits superb oxygen permeability, yet it suffers from poor phase stability. In this study, we aim to improve the operational stability of the BSCF membrane by introducing a high-valence W6+ ion as a B-site dopant. Its effect on the phase composition, structure, structural stability, electrical conductivity, oxygen transfer rate and oxygen permeability as a membrane is systematically investigated. Upon the partial substitution of cobalt and iron in the W6+-doped BSCF, single/double perovskite composites are formed instead of single perovskite composites. Remarkably, the formation of the single/double perovskite composites enhances the oxygen permeation stability without obviously compromising the oxygen permeability. Among the various materials, the composite with the nominal composition of Ba0.5Sr0.5Co0.8Fe0.1W0.1O3-δ shows the best performance in terms of stability and oxygen permeability. These findings thus introduce a new way to design conducting ceramic membranes for oxygen separation at high temperatures. 2020-05-18T00:42:10Z 2020-05-18T00:42:10Z 2018 Journal Article Zhang, J., Zhang, Z., Chen, Y., Xu, X., Zhou, C., Yang, G., . . . Shao, Z. (2018). Materials design for ceramic oxygen permeation membranes : single perovskite vs. single/double perovskite composite, a case study of tungsten-doped barium strontium cobalt ferrite. Journal of Membrane Science, 566, 278-287. doi:10.1016/j.memsci.2018.09.004 0376-7388 https://hdl.handle.net/10356/139171 10.1016/j.memsci.2018.09.004 2-s2.0-85053086303 566 278 287 en Journal of Membrane Science © 2018 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Materials Oxygen Permeation Membrane Perovskite Oxides Zhang, Junxing Zhang, Zhenbao Chen, Yubo Xu, Xiaomin Zhou, Chuan Yang, Guangming Zhou, Wei Shao, Zongping Materials design for ceramic oxygen permeation membranes : single perovskite vs. single/double perovskite composite, a case study of tungsten-doped barium strontium cobalt ferrite |
| title | Materials design for ceramic oxygen permeation membranes : single perovskite vs. single/double perovskite composite, a case study of tungsten-doped barium strontium cobalt ferrite |
| title_full | Materials design for ceramic oxygen permeation membranes : single perovskite vs. single/double perovskite composite, a case study of tungsten-doped barium strontium cobalt ferrite |
| title_fullStr | Materials design for ceramic oxygen permeation membranes : single perovskite vs. single/double perovskite composite, a case study of tungsten-doped barium strontium cobalt ferrite |
| title_full_unstemmed | Materials design for ceramic oxygen permeation membranes : single perovskite vs. single/double perovskite composite, a case study of tungsten-doped barium strontium cobalt ferrite |
| title_short | Materials design for ceramic oxygen permeation membranes : single perovskite vs. single/double perovskite composite, a case study of tungsten-doped barium strontium cobalt ferrite |
| title_sort | materials design for ceramic oxygen permeation membranes single perovskite vs single double perovskite composite a case study of tungsten doped barium strontium cobalt ferrite |
| topic | Engineering::Materials Oxygen Permeation Membrane Perovskite Oxides |
| url | https://hdl.handle.net/10356/139171 |
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