Synthesis and characterization of structural and electrical properties of Zirconium doped Barium Titanate ceramics

Abstract

Ba Ti _0.90 Zr_0.10O₃ (BZT10), Ba Ti _0.85 Zr_0.15O₃ (BZT15) Ba Ti _0.80 Zr_0.20O₃ (BZT20) ceramics were fabricated by conventional solid-state route with different concentrations. The synthesized samples were subjected to structural, morphological & electrical characterization. The samples were calcined at 850 ⁰C and sintered at 1250 ⁰C. The dominance of the tetragonal phase with space group P4mm was confirmed by the XRD patterns. The lattice parameters and crystalline behavior were investigated. Ba Ti _0.85 Zr_0.15 O₃ showed the highest relative density (~ 85%), crystallinity (~ 96%) with better crystalline nature and tetragonality. A homogeneous grain size of < 1 µm was reported in SEM. The comparison of current density, resistance with applied voltage was denoted by I~V characteristics. The analysis confirmed that all the synthesized samples were pure ferroelectric material with high resistivity. Thus, zirconia doped barium titanate ceramics with suitable current density, resistance could be attractive materials for ceramic capacitors and electronic device applications.