STRUCTURAL AND ELECTRICAL INVESTIGATION OF IRON SUBMITTED BARIUM TITANATE

Abstract

Ferroelectric ceramics have been found to be useful for various practical applications, such as high dielectric constant capacitors, piezoelectric sonar and ultrasonic transducers etc. Barium Titanate was the first ferroelectric ceramic material, which as discovered in mid 1940s. Barium Titanate is of perovskite type structured material. The ferroelectric properties of Barium Titanate may be efficiently controlled by substituting with different transition elements. It is possible to change the parameters such as maximum dielectric constant, transition temperature by suitable substitution. Doping at either Barium-site or Titanium-site modifies the properties of the material. In the present study, the Iron has been substituted at Titanium site and the change in the properties of material has been observed. The dielectric property of ferroelectric material is greatly influenced by their particle size. Hence, in the present work, the samples of different sizes have been prepared by mechanical activation method and characterized. Also, the effect of sintering temperature has been studied.