Ceramics-Silikáty 57 (2) 146-150 (2013)

EFFECTS OF NEODYMIUM DOPING ON DIELECTRIC AND OPTICAL PROPERTIES OF Ba_(1-x)Nd_xTi_1.005O₃ CERAMICS

This paper investigated the optical properties and dielectric properties of neodymium doped BaTiO₃ ceramics prepared by Ba_(1-x)Nd_xTi_1.005O₃ powders synthesized via a hydrothermal method. The effects of Nd³⁺ ions content on the structure, dielectric properties and optical properties of the ceramics were studied. The structural analysis performed on the X-ray diffractometer shows that the phase compositions of all ceramics are tetragonal phase structure. The red shift of the absorption edge indicates the presence of defect energy levels which was proved by the UV-Vis-NIR diffuse reflection spectra. Dielectric property measurements show that Nd-doped BaTiO₃ ceramics possess improved dielectric properties at low Nd³⁺ contents (x = 0.001 and 0.002), as demonstrated by decreased dependence to frequency for both the dielectric constant and dielectric loss.

Keywords: Barium titanate ceramics, Nd³⁺ content, Dielectric and optical properties