LAUSR

In this study, the structural, dielectric and photoluminescence analysis of M-phase Li1.11−yTa0.89−3yTi0.11+4yO3 (y = 0.00, 0.02, 0.07, 0.12, 0.17) solid solutions in the Li2O–Ta2O5–TiO2 ternary system prepared by conventional solid state method has been carried out. X-ray diffraction patterns revealed the formation of M-phase solid solutions with hexagonal symmetry. Superstructure formation was observed for composition y ≥ 0.07. The closely packed and plate-like grains were formed with high density (relative density > 92%) as a result of moderate sintering at 1150 °C. The average particle size 22.63 nm was obtained using Transmission electron microscopy. Dielectric permittivity decreased from 41 to 32 and temperature co-efficient of resonant frequency changed from − 106 to 43 ppm/°C with variation in y = 0.00 to 0.17 at 1 MHz frequency. The maximum value of photo-luminous intensity (287.21) was obtained for the composition Li1.11Ta0.89Ti0.11O3 that exhibits the yellow photo-luminous emission peak at 580.2 nm.