The relaxor type of ferroelectric material Ba(FeNb)1∕2O3, which has a partially disordered perovskite structure, has been characterized and shown a maximum plateau of the dielectric permittivity depending upon the temperature. The dielectric constant at a low frequency is up to 30 000 at room temperature. While the single-phase La-doped Ba(FeNb)1∕2O3, Ba1−xLax(Fe1∕2Nb1∕2)1−x∕4O3(0⩽x⩽0.2) has a monoclinic structure solid solutions up to x⩽0.2, the lattice parameters decrease with an increasing La concentration. The temperature dependence of the dielectric constant of the La-doped Ba(FeNb)1∕2O3 was measured with different La contents, showing that the dielectric permittivity is higher than 105 at an 8mol% La concentration. The present dielectric dispersion was interpreted on the basis of the interfacial polarization at the grain-boundary region.
No takes yet. Share an insight, caveat, or question.
Chung et al. (2004) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: