Synthesis of Pr3+-doped CaTiO3 using polymeric precursor and microwave-assisted hydrothermal methods: A comparative study

Author(s)

Goncalves, R. F. ; Lima, A. R. F. ; Godinho, M. J. ; Moura, A. P. ; Espinosa, J. ; Longo, E. ; Marques, A. P. A.

• Document type: Journal article
• Source: CERAMICS INTERNATIONAL; v. 41, n. 10, p. 8-pg., 2015-12-01.

Abstract

Praseodymium-doped calcium titanate, CaTiO3:Pr3+, powders (0 and 2 mol% Pr3+ ions) were synthesized using the polymeric precursor and microwave-assisted hydrothermal methods. Both methods appear to be efficient in preparing photoluminescence materials because they require low temperatures and very short reaction times. Several characterization techniques were used to evaluate the influence of structural disorder on the reactions and properties of the materials produced. X-ray diffraction and Rietveld refinement were used to confirm that syntheses were successful. Raman spectroscopy revealed significant details of the structures of the materials produced. FE-SEM images were used to determine the shapes and dimensions of the products. Morphologies were found to be dependent on the synthesis method used. PL spectra showed Pr3+ emission lines at approximately 612 nm when the CT:Pr3+ powders were excited with a 350.7 nm laser. These lines correspond to D-1(2)-> H-3(4) transitions. (C) 2015 Elsevier Ltd and Techna Group Sr.!. All rights reserved. (AU)

• FAPESP's process: 13/07437-5 - Production and characterization of nanostructures ceramic materials pure and hybrids
• Grantee: Ana Paula de Azevedo Marques
• Support Opportunities: Regular Research Grants
• FAPESP's process: 08/57872-1 - National Institute for Materials Science in Nanotechnology
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC