Concentration dependence of the dielectric constant in mixed oxides MxOyMp' O-q

The dielectric constants in mixed oxides ZrO2+Y2O3, Ta2O5+TiO2, Ta2O5+Y2O3, and ZrO2+SiO2 are examined in the context of the oxide additivity rule for molecular polarizability. The experimentally observed concentration depend ence of the dielectric constant can be satisfactorily explained by taking a ccount of effective molecular polarizability and molecular volume changes. The simple rule thus enables predictive study of the dielectric constant of oxide alloys. (C) 2001 American Institute of Physics.