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Dielectric Behavior of Pb 0.76 La 0.16 (Zr 0.53 Ti 0.47 )O 3 with Diffuse Phase Transition

PLZT (8/53/47) ceramics were prepared by conventional oxide mixture method. The dielectric properties showed a frequency dependence. The temperature of the maximum dielectric permittivity shifts to higher temperatures and its values decreases with increasing frequency. A fitting of the l vs T curves with a gaussian function gave for the phase transition a diffuseness factor i , (135.6 - 0.3)°C. This result is compared with those of the other PLZT and is discussed in light of a model which try to explain the character of the diffuse phase transition.