K. Fukuda et al., INFLUENCE OF RARE-EARTH IONS ON BAO-TIO2-RARE EARTH OXIDE CERAMICS FOR MICROWAVE APPLICATIONS, JPN J A P 1, 32(4), 1993, pp. 1712-1715
The dielectric ceramic materials, 0.143BaO-0.714TiO2-0.143 rare earth
oxides (REO(x)), have unique dielectric properties at microwave freque
ncies, which depend on the rare earth element (RE=Pr, Nd, Sm). In orde
r to study the effect of the rare earth ions on dielectric properties,
infrared reflection spectra of these ceramics were measured from 50 t
o 4000 cm-1 at room temperature. These data were analyzed according to
the model proposed by Gervais and Piriou. Also, the fourth-order diel
ectric constants of these materials were estimated for the purpose of
investigating the relationship between the dielectric loss and the anh
armonic terms in the potential energy.