Modeling of dielectric data of mechanically milled strontium calcium bismuth titanate using modified Lorentz equations

Abstract

Oxides of strontium, bismuth, calcium, and titanium were aggregated by high energy mechanical milling. XRD and SEM analyses revealed characteristic peaks for materials of a similar crystal structure. The temperature response of dielectric constant has been recorded at various frequencies. An increase of dielectric constant until the Curie temperature has a huge impact on the dielectric constant. A transformed version of the Lorentz equation is suggested to match experimental results and find the activation energy. To ensure the reliability of our formula, the value from the non-linear curve fitting is checked for each trial. The activation energy was found to be in the range of 80–90 μeV.

Keywords:

• Ceramic
• transformed Lorentz formula
• activation energy
• ferroelectric