Correlation between photoluminescence and structural defects in Ca1+x Cu3-x Ti4 O12 systems
| Autor: | José Arana Varela, Elaine C. Paris, Valmor Roberto Mastelaro, Larissa H. Oliveira, Miguel Angel Ramírez, Waldir Avansi, Elson Longo |
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| Přispěvatelé: | ELAINE CRISTINA PARIS, CNPDIA. |
| Rok vydání: | 2013 |
| Předmět: |
Fotoluminescência
Materials science Photoluminescence Rietveld refinement MATERIAIS ÓPTICOS XANES Spectral line Ultravioleta-visível Crystallography Cerâmica X-ray crystallography Materials Chemistry Ceramics and Composites Defeitos estruturais Orthorhombic crystal system Solubility Spectroscopy Difração de raio X |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| Popis: | Ca1+xCu3−xTi4O12 powders were synthesized by a conventional solid-state reaction. X-ray diffraction (XRD) was performed to verify the formation of cubic CaCu3Ti4O12 (CCTO) and orthorhombic CaTiO3 (CTO) phases at long range. Rietveld refinements indicate that excess Ca atoms added to the Ca1−xCu3−xTi4O12 (x = 1.0) composition segregated in a CaTiO3 secondary phase suggesting that solubility limit of Ca atoms in the CaCu3Ti4O12 lattice was reached for this system. The FE-SEM images show that the Ca1+xCu3−xTi4O12 (0 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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