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The frequency study of the dielectric properties of bt

Author:

Elbasset, A., Sayouri, S., Lamcharfi, T. and Abdi, F.

Subject Area:

Physical Sciences and Engineering

Abstract:

This work is interested in the frequency study of the dielectric properties of BT ceramics. In this regard, we used two methods for measuring capacitance. In the first method the frequency was varied in the interval 100Hz – 1000 kHz and the measuring temperature was varied with a rise rate of 1°C/min, whereas in the second method the measurement temperature was first fixed and after its stabilization the capacitance measurement was started in a frequency range which varies between 1 kHz and 2 MHz by a step of 1 kHz. In particular, the results found show, that the values of the dielectric constant are higher and the transition temperature Tc lowered by 12 °C in the second method.

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