Abstract
Dielectric relaxation studies have been made in pyrochlore (Bi1.5Zn0.5)(Zn0.5−x/3SnxNb1.5−2x/3)O7 ceramics where 0 ≤ x ≤ 1.5. The measurements of dielectric constant (ɛ) and dielectric loss (tanδ) are made in the frequency range from 1 to 1,000 kHz at low temperatures from 100 to 450K. Frequency dispersion associated with dielectric relaxation phenomena in polycrystalline cubic pyrochlore is analyzed. The effect of Sn on the dielectric relaxation behavior and the physical mechanism giving polarization is briefly discussed.
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