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https://hdl.handle.net/1822/79765
Título: | Thermal stability and decomposition kinetics of NdNiO3− δ at 1 bar of O2 |
Autor(es): | Bassou, A. A. Machado, P. J. Gomes, M. M. Manjunath, B. Vilarinho, R. Silva, Bruna Andreia Nogueira Airosa Oliveira, José A. Almeida, B. G. Almeida, A. Fernandes, J. R. Fernandes, L. S. Moreira, J. Agostinho Tavares, P. B. |
Palavras-chave: | A. Ceramics A. Oxides B. Phase transitions C. Raman spectroscopy C. X-ray diffraction Ceramics Oxides Phase transitions X-ray diffraction Raman spectroscopy |
Data: | Set-2021 |
Editora: | Elsevier 1 |
Revista: | Materials Today Communications |
Citação: | Bassou, A. A., Machado, P. J., Gomes, M. M., Manjunath, B., et al.(2021). Thermal stability and decomposition kinetics of NdNiO3− δ at 1 bar of O2. Materials Today Communications, 28, 102663 |
Resumo(s): | Despite the interest in rare-earth nickelates for applications, their processing under 1 bar of oxygen pressure is still challenging. In this work, we report the co-precipitation synthesis, thermal stability and thermally driven decomposition of NdNiO3 phase, in order to determine the synthesis parameters towards a pure perovskite phase. We concluded that using a 1% molar excess of Nd during preparation and posterior annealing at around 900 °C at 1 bar of O2 yields an almost pure NdNiO3−δ phase (with a hexagonal Nd2O3 phase below 0.6% molar), with an oxygen deficiency of δ = 0.082 ± 0.001. The decomposition of the NdNiO3−δ phase into Nd4Ni3O10 and NiO was found to start above 900 °C. On further heating, above 1050 °C, the Nd4Ni3O10 decomposes into Nd2NiO4 and NiO phases. Structural parameters and Raman spectra are provided for the NdNiO3, Nd4Ni3O10 and Nd2NiO4 compounds. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/79765 |
DOI: | 10.1016/j.mtcomm.2021.102663 |
e-ISSN: | 2352-4928 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S2352492821006553 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | PHYSICS OF QUANTUM MATERIALS AND BIONANOSTRUCTURES (2018 - ...) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Materials Today Communications, 28,102663 (2021).pdf | 3,46 MB | Adobe PDF | Ver/Abrir |