Effect of Sr2+ and Ba2+ doping on structural stability and mechanical properties of La2NiO4+δ
Structural and mechanical Characterizations of La1.8M0.2NiO4+δ (M: Sr and Ba) prepared by low frequency ultra-sound assisted synthesis technique and sintered at different temperatures were studied. HRTEM and XRD analyses showed the uniform shape of calcined nanocrystalline powders with the particle...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/142534 |
| _version_ | 1811690392070914048 |
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| author | Akbari-Fakhrabadi, Ali Toledo, E. G. Canales, J. I. Meruane, Viviana Chan, Siewhwa Gracia-Pinilla, Miguel A. |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Akbari-Fakhrabadi, Ali Toledo, E. G. Canales, J. I. Meruane, Viviana Chan, Siewhwa Gracia-Pinilla, Miguel A. |
| author_sort | Akbari-Fakhrabadi, Ali |
| collection | NTU |
| description | Structural and mechanical Characterizations of La1.8M0.2NiO4+δ (M: Sr and Ba) prepared by low frequency ultra-sound assisted synthesis technique and sintered at different temperatures were studied. HRTEM and XRD analyses showed the uniform shape of calcined nanocrystalline powders with the particle size of less than 100 nm with mixed phases, which were refined by Rietveld method using orthorhombic (Fmmm) and tetragonal (F4/mmm) structures. Sintering La1.8Sr0.2NiO4+δ and La1.8Ba0.2NiO4+δ compacted discs at temperatures higher than 1300 °C and 1250 °C, respectively, resulted in appearance of extra peaks close to a monoclinic phase. Doping La2NiO4+δ with Sr2+ and Ba2+ did not affect its sinterability and average grain size significantly, however, Ba2+ improved the elastic modulus and microhardness, while Sr2+ improved the fracture toughness. |
| first_indexed | 2024-10-01T06:03:16Z |
| format | Journal Article |
| id | ntu-10356/142534 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:03:16Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1425342021-01-08T06:15:05Z Effect of Sr2+ and Ba2+ doping on structural stability and mechanical properties of La2NiO4+δ Akbari-Fakhrabadi, Ali Toledo, E. G. Canales, J. I. Meruane, Viviana Chan, Siewhwa Gracia-Pinilla, Miguel A. School of Mechanical and Aerospace Engineering Energy Research Institute @ NTU (ERI@N) Engineering::Mechanical engineering Lanthanum Nickelate La1.8Sr0.2NiO4+d Structural and mechanical Characterizations of La1.8M0.2NiO4+δ (M: Sr and Ba) prepared by low frequency ultra-sound assisted synthesis technique and sintered at different temperatures were studied. HRTEM and XRD analyses showed the uniform shape of calcined nanocrystalline powders with the particle size of less than 100 nm with mixed phases, which were refined by Rietveld method using orthorhombic (Fmmm) and tetragonal (F4/mmm) structures. Sintering La1.8Sr0.2NiO4+δ and La1.8Ba0.2NiO4+δ compacted discs at temperatures higher than 1300 °C and 1250 °C, respectively, resulted in appearance of extra peaks close to a monoclinic phase. Doping La2NiO4+δ with Sr2+ and Ba2+ did not affect its sinterability and average grain size significantly, however, Ba2+ improved the elastic modulus and microhardness, while Sr2+ improved the fracture toughness. 2020-06-24T01:35:54Z 2020-06-24T01:35:54Z 2018 Journal Article Akbari-Fakhrabadi, A., Toledo, E. G., Canales, J. I., Meruane, V., Chan, S., & Gracia-Pinilla, M. A. (2018). Effect of Sr2+ and Ba2+ doping on structural stability and mechanical properties of La2NiO4+δ. Ceramics International, 44(9), 10551-10557. doi:10.1016/j.ceramint.2018.03.077 0272-8842 https://hdl.handle.net/10356/142534 10.1016/j.ceramint.2018.03.077 2-s2.0-85043991329 9 44 10551 10557 en Ceramics International © 2018 Elsevier Ltd and Techna Group S.r.l. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Lanthanum Nickelate La1.8Sr0.2NiO4+d Akbari-Fakhrabadi, Ali Toledo, E. G. Canales, J. I. Meruane, Viviana Chan, Siewhwa Gracia-Pinilla, Miguel A. Effect of Sr2+ and Ba2+ doping on structural stability and mechanical properties of La2NiO4+δ |
| title | Effect of Sr2+ and Ba2+ doping on structural stability and mechanical properties of La2NiO4+δ |
| title_full | Effect of Sr2+ and Ba2+ doping on structural stability and mechanical properties of La2NiO4+δ |
| title_fullStr | Effect of Sr2+ and Ba2+ doping on structural stability and mechanical properties of La2NiO4+δ |
| title_full_unstemmed | Effect of Sr2+ and Ba2+ doping on structural stability and mechanical properties of La2NiO4+δ |
| title_short | Effect of Sr2+ and Ba2+ doping on structural stability and mechanical properties of La2NiO4+δ |
| title_sort | effect of sr2 and ba2 doping on structural stability and mechanical properties of la2nio4 δ |
| topic | Engineering::Mechanical engineering Lanthanum Nickelate La1.8Sr0.2NiO4+d |
| url | https://hdl.handle.net/10356/142534 |
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