Synthesis and characterization of Li2TiSiO5 obtained by melting and solid-state reaction

• Published in: Journal of thermal analysis and calorimetry 2017, Vol.127 (1), p.463-467
• Main Authors: Souza, M. T., Cesconeto, F. R., Arcaro, S., Teixeira, A. H. B., Raupp-Pereira, F., Montedo, O. R. K., de Oliveira, A. P. Novaes
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Chemical reactions; Chemistry; Chemistry and Materials Science; Crystallography; Heat treatment; Inorganic Chemistry; Measurement Science and Instrumentation; Nanoparticles; Photoluminescence; Physical Chemistry; Polymer Sciences; Raw materials; Silicon dioxide; Solid state; Titanium dioxide
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-016-5396-8

In this work, the synthesis of the Li 2 TiSiO 5 photoluminescent compound, obtained from a stoichiometric mixture of Li 2 CO 3 , SiO 2 and TiO 2 nanoparticles, was investigated by two different routes named route I (melting and quenching) and route II (solid-state reaction). In the route I, the raw materials were melted (1550 °C/2 h) and cooled into water. Subsequently, the solidified product was milled (30 min) in a high-energy mill. In the route II, the raw materials were directly milled (10 min). The obtained powders, from both routes, were heat treated at different temperatures (900–1000 °C/60 min) and then subjected to crystallographic (XRD) and thermal (DSC) analyses in order to investigate the resulting structure and the associated physical–chemical reactions. The results showed that it is possible to obtain the Li 2 TiSiO 5 compound from both synthesis routes but, apparently, the route I seems to be more appropriated to obtain the Li 2 TiSiO 5 compound and to demonstrate the photoluminescence phenomena with and even without thermal treatment.