Abstract
Temperature and frequency dependence dielectric permittivity of Ba0.925Dy0.075TiO3 ceramic has been studied in the temperature range of 100 K to 350 K at the frequencies, 1 Khz, 10 KHz, 100 KHz and 1 MHz for the first time. Diffuse phase transition and frequency dispersion is observed in the permittivity-vs-temperature plots. This has been attributed to the occurrence of relaxor ferroelectric behavior. The observed relaxor behavior has been quantitatively characterized based on phenomenological parameters. A comparison with the Zr doped BaTiO3 has also been presented. The microstructure of as sintered samples shows a dense and almost uniform micrograph with some impurity phases, and the grains are almost spherical.
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