Abstract
A systematic investigation on dielectric property changes with compositional variation was carried out for binary compound ceramics which were fabricated by the chemical powder preparation method in the identical systems Ln2O3-TiO2 (Ln=La, Nd and Sm). The temperature coefficient of permittivity (TCεr) for those dielectrics was found to show a considerable deviation from a simple relation of TCεr=-εr·αL. It also found that the solubility limits of Sm3+ into the Nd3+ lattice were greatly extended in the binary compounds up to ∼80 or 90 mol%. Different dielectric property changes in the solid solutions with lanthanide substitution (La→Nd→Sm) were discussed on the basis of the different contributions of substituted ions to the polarization.
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