Several pellets of general formula Ba1-xMx(Ti1-xLix)O3-3xF3x were prepared from BaTiO3, MF2 (M = Ca, Sr, Ba or Pb) and LiF powders then sintered by the conventional solid state route at 900 or 1000 degrees C for 1, 2 or 4 hours. X-Ray powder diffraction patterns were collected at room temperature and SEM observations were carried out. Dielectric measurements were performed between 150 and 450K in the frequency range 50Hz - 40MHz. All the ceramics exhibit a very broad ferroelectric displacive phase transition in the temperature range 255K <= T-C <= 328 K. The epsilon(r)(') - T curves and the values of tan delta are compatible with the Z5U class of capacitors. Furthermore, a Debye dielectric relaxation occurs in these oxifluorids in the frequency range 4MHz not less than or equal to(r) 8.5MHz.