Studying The Dielectric and Structural Properties of Baxsr1-Xtio3 (BST) Ferroelectric System Prepared by Using Oxalic Acid Route

Abstract

BaxSr1-xTiO3 (BST) ferroelectric nano, poly crystalline systems wereprocessed with three concentrations (x = 0.5, 0.7 and 0.9) using a technique knownas oxalic acid route. The XRD spectra were analyzed, and used Scherer formula toestimate the crystallite size of the products, which reached to 15.4 nm at x = 0.5. Itis found that increasing of Sr+2 cations help to decrease the crystallite size ofBaxSr1-xTiO3 system and the tetragonality c/a increases when the crystallite sizeincreases. In physical tests we conclude that the oxalic acid method is a goodmethod to prepare a BST ferroelectric phase with high density (5.05, 5.5 and 5.45)gm/cm3, and small porosity (16, 8, and11) % for (x = 0.5, 0.7 and 0.9)respectively.