Abstract:
Bismuth ferrite (BiFeO3) is one of multiferroic material group, but it is difficult to produce
BiFeO3 in single phase as multiferroic material because it occurs leakage of current arising
from non stoichiometric. So, to minimize it, it has already been engineering processed to
synthesis BiFeO3 doped by Mg to produce Bi0.9Mg0.1FeO3 and Bi0.93Mg0.07FeO3. It used sol-gel
method to produce the ceramics. The result of TGA/DTA(Thermo Gravimetric
Analysis/Differential Thermal Analysis) test shows that the temperature of calcination is about
of 150 and 175oC and temperature of sintering is about of 650oC. Characterization of the powder
has already been done by using X-Ray Diffraction (XRD) test and electrical properties test. The
results of XRD test show that the powder of Bi0.9Mg0.1FeO3has minimum impurities with total
oxide of 6.9% (bismite 3.5% and silenite 3.4%) at calcination temperature of 175oC for 4 hours
and sintering at 650oC for 6 hours. Meanwhile at same parameter, Bi0.93Mg0.07FeO3 has more
oxide phases with total oxide of 14.5% which consists of silenite (2.5%) and Bi2O4 (12%).
Presence of oxide phases could cause leakage of current decreasing electrical properties. The
values of electrical saturation polarization for ceramic having minimum total oxide
(Bi0.9Mg0.1FeO3) is higher than ceramic having more oxide (Bi0.93Mg0.07FeO3). The value of
electric saturation polarization for Bi0.9Mg0.1FeO3 is of 0.26 kv/cm and for Bi0.93Mg0.07FeO3 is
of 0.11 kV/cm.
