Excellent thermal stability and low dielectric loss of (1-x)BaTiO3-xBi(Li0.5Nb0.5)O3 solid solutions in a broad temperature range applied in X8R

(1 - x)BaTiO3-xBi(Li0.5Nb0.5)O-3 [(1 - x)BT-xBLN, 0 <= x <= 0.1] lead-free ceramics were prepared via a conventional solid state reaction method. Raman spectra and X-ray diffraction results confirmed the phase transformation from tetragonal to pseudo cubic symmetry at 0 <= x <= 0.02. With adding Bi(Li0.5Nb0.5)O-3, the thermal stability of permittivity and dielectric loss of ceramics were improved. Especially, 0.9BT-0.1BLN ceramics exhibited good dielectric properties with small Delta epsilon/epsilon(25 degrees C) values (<= +/- 15%) in a wide temperature range of -61-160 degrees C, high relative permittivity (-1500-1750) and low dielectric loss (tan delta <= 0.02) from -60 to 200 degrees C, which indicates that BT-BLN is candidate for X8R devices.