Study on preparation of BaTiO₃ ceramics doped with Nd ₂O₃ by Sol-Gel

The technological condition for the preparation of BaTiO₃ ceramics doped with Nd₂O₃ by Sol-Gel was determined through orthogonal experiment. When n_Ba(Ac)2: n_Ti(OC4H9)2, : n_Nd2O3: n_{CH2(CH2)2CH2OH}: n_H2O = 1.00: 1.00: 0.003: 7.30: 37.04, pH = 3.5, T = 25°C, the light-yellow-transparent-stable solution and thorough transparent gel was generated, the transforming time of solution to gel was 25h. The crystal structure and particle size of BaTiO ₃ ceramics doped with Nd₂O₃ were studied by SEM and X-ray respectively, the type of the crystal was tetragonal, the particle size was about 24.7nm. The dielectric constant (ε) and dielectric loss (tanδ) of BaTiO₃ ceramics doped with Nd₂O ₃ were determined between 10⁴-10⁶Hz, and the results showed that the dielectric constant was increased obviously, the dielectric loss was decreased clear and the resistivity (ρ_v) was also decreased noticeably.