Effects of V Substitution on Dielectric and Polarization Properties for Sr0.5Bi2.25Na1.25(Nb3−xVx)O12 Ceramics
The effects of V substitution for Nb on the dielectric and polarization properties of Sr0.5Bi2.25Na1.25(Nb3−xVx)O12 ceramics were investigated in this study. From the X-ray powder diffraction results, no secondary phase was detected in the composition range of 0–0.075. The remanent polarizations (Pr) of the samples in the composition range of 0–0.03 were improved by the V substitution for Nb and the highest Pr value of approximately 15 C/cm2 was obtained at x=0.03; it was noted that the V substitution for Nb was effective in improving the Pr values in this ceramics. On the other hand, the coercive fields (Ec) of the samples were on the order of approximately 40 kV/cm in such a composition range. Moreover, the anomalous variations in the dielectric constant were observed in the composition range of 0–0.075. Also, it was observed that the dielectric loss increased drastically at the temperature of approximately 500°C.
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Document Type: Research Article
Affiliations: Faculty of Science and Technology, Meijo University, Nagoya 468-8502, Japan
Publication date: January 1, 2008