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Optical Properties and Growth Mechanism of La(3)Ga(5.5)Nb(0.5)O(14) Macroporous Ceramic
Optical properties and growth mechanism of La(3)Ga(5.5)Nb(0.5)O(14) oxides by a Pechini process were investigated. The structure and morphology were obtained after sintering at 600–800 °C. This crystallized orthorhombic La(3)Ga(5.5)Nb(0.5)O(14) can be obtained by the heat treatment process at 800 °C...
| Autores principales: | , , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
Springer US
2019
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6702618/ https://www.ncbi.nlm.nih.gov/pubmed/31420745 http://dx.doi.org/10.1186/s11671-019-3104-x |
| Sumario: | Optical properties and growth mechanism of La(3)Ga(5.5)Nb(0.5)O(14) oxides by a Pechini process were investigated. The structure and morphology were obtained after sintering at 600–800 °C. This crystallized orthorhombic La(3)Ga(5.5)Nb(0.5)O(14) can be obtained by the heat treatment process at 800 °C from XRD. A proposed schematic growth mechanism of La3Ga5.5Nb0.5O14 macroporous based on the details provided is shown. The photo-luminescence spectra shown that under 327 nm excitation spectra, a broad and blue emission peak is observed at 475 nm at 77 K and this spectrum is originated from the [NbO(6)](7−) octahedra group. The optical absorption spectra of the 800 °C sample exhibited a well-crystalline and very low oxygen vacancy, which corresponded to the band gap energies of 3.95 eV. |
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