Effect of Pr6O11 Substitution on Structural and Dielectric Properties of BaZrTiO5 Ceramic Materials

In the present work, we studied the effect of the substitution of BaO by Pr 6 O 11 , on the structure, dielectric and electrical properties of BaTiZrO 5 ceramics.Samples of general formula (99.2-x)Bao-xPr 6 O 11 -0.5TiO 2 -0.3ZrO 2 (x =0.1, 0.2, 0.5 and 0.6) named P 1 , P 2 , P 3 and P 4 respectively were prepared by conventional ceramic method.The structure of the prepared samples was studied using X-ray diffraction, water absorption % and SEM.Addition of Pr 6 O 11 minimized the presence of closed pores and thus led to improved densification.The crystallize size of the prepared samples was calculated and found in the range 22-26 nm.The effect of the substitution by Pr 6 O 11 on breakdown field, dielectric constant, ac resistivity was investigated.Finally, it was found that, the substitution BaO by Pr 6 O 11 improves the physical properties of BaTiZrO 5 ceramics by increasing their break down field, ac resistivity and dielectric constant that makes these ceramics useful in the technological applications.