Comparison between synthesis methods to obtain magnesium titanate undoped and containing trivalent chromium

• Autor(a) principal: Lins, Nathália Lima
• Data de Publicação: 2023
• Outros Autores: Santana, Nathália Dias da Cunha, López, Ada, Sosman, Lilian Pantoja, Pedro, Sandra da Silva
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista de Engenharia Química e Química
• Texto Completo: https://periodicos.ufv.br/jcec/article/view/17676
• topic: Ceramics; Synthesis; X-ray diffraction; Photoluminescence; Cerâmicas; Síntese; Difração de Raios X; Fotoluminescência

In this work we present the synthesis of magnesium titanate ceramic (Mg2TiO4) undoped and containing Cr3+ as activator ion through two different preparation methods, the solid-state reaction and the acetate (wet chemical) method. The samples were characterized by X-ray diffraction and photoluminescence spectroscopy. We intend to verify the influence of the preparation method on the quality of the samples and on the optical properties of the material. The compound was successfully synthesized in both preparation processes, and the photoluminescence measurements show that the spectra of the undoped samples are very different from the samples containing Cr3+ and also indicate that the presence of Cr3+ as an emitting ion increases significantly the compound emission. A subtle increase in the emission signal intensity of samples prepared by the wet chemical method was also observed when compared to samples prepared by solid-state reaction.