Non Linear Dielectric Phenomenon in BaTiO3 - Bi (Ti1-xMgx)O3 . Ceramic Material
DOI:
https://doi.org/10.24203/ajas.v10i4.7036Keywords:
non linear dielectric, tunability, permittivityAbstract
The distinguishing characteristic of an insulator is its resistivity. An insulator has a higher resistivity than a semiconductor or conductor and has high dielectric properties. The adjustable dielectric property is characterized by a change in the permittivity of the dielectric under an applied electric field, this phenomenon is called "dielectric nonlinearity" (dielectric tunability properties). With these properties, a new phenomenon will arise adjustable dielectric properties in dielectric ceramic materials. The aim of this research is to observe the non-linear dielectric phenomenon in BaTiO3-Bi(Ti1-xMgx)O3 ceramic material with x= 0.5, 0.6, 0.7, 0.8 and 0.9. Ceramic materials were synthesized using the sol-gel method which produced nano-sized powders. Impedance data was measured using an impedance analyzer (Solartron SI 1260, Solartron Metrology, West Sussex, UK) in a frequency range of 100 Hz to 500 Hz with an ac measuring voltage of 0.1 V. Dielectric tunability properties were measured from 0oC to 250oC using an automatic component analyzer. at 10 kHz. All samples show the phenomenon of dielectric tunability with different maximum permittivity. The highest permittivity was obtained at x= 0.6 but the highest transition temperature where non-linear phenomena occurred was found in the sample with x= 0.5.
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