Preparation and second harmonic generation of Ba2TiSi2O8 films

The synthesis and characterization of the Ba2TiSi2O8 films are described. The Ba2TiSi2O8 crystal was obtained after heat treatment at above 630 °C of a sol-gel derived glassy material which has a chemical composition (mole ratio) 2BaO, TiO2, 2SiO2, and then the Ba2TiSi2O8 films were formed from the hydration of CaO-P2O5 glass powders. Heat treatment conditions and crystallization of the synthesized materials were studied by DSC-TG, XRD, and FT-IR. Second order nonlinear optical property has been verified by second harmonic generation test at 1064 nm. These results showed that the hydration process has a potential in rendering shape-comfortable optical materials.