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

Abstract

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.

High-temperature reactions in the Co3Cr4(PO4)6–Cr(PO3)3 system

“…Reactions were conducted by the conventional method of calcining samples [9][10][11][12][13][14]. Appropriate portions of reacting substances were homogenized by grinding, pressed into pellets and heated in air atmosphere in several stages, until an equilibrium state was attained.…”

“…The XRD method was used to determine the type of the phases occurring in particular samples [13,14]. The powder diffraction patterns of samples were recorded with the aid of the Empyrean II diffractometer (PANalytical, Netherlands) using CuK a radiation with graphite monochromator.…”

Fabrication of Dual‐Modified Carbon Network Enabling Improved Electronic and Ionic Conductivities for Fast and Durable Li2TiSiO5 Anodes

“…For those three samples, all diffraction peaks were perfectly index to LTSO with the space group of Pnma (JCPDS NO. 13‐0268), indicating the purity of LTSO in composites, and only bread carbon peaks can be also observed in LTSO/CNT and C@LTSO/CNT at the peak position of approximately 25 degree due to the low content and/or low degree of graphite. Raman spectra provides some information about the characteristic D and G bands of the carbon species in the as‐prepared samples.…”

Reinvestigations of the Li2O–WO3 system

“…The pure phases obtained in this work were examined additionally by the DTA-TG, UV-Vis-IR/DRS and IR methods. These measuring methods were selected because they allow determination of phase composition of samples, establishing their melting temperatures as well as melting behaviour [23][24][25][26][27][28][29][30]. X-ray phase analysis (XRD) of the samples was performed using an Empyrean II diffractometer (PANalytical, The Nederlands, copper radiation filtered with a graphite monochromator) with the help of Highscore ?…”