Role of charge compensation mechanism and defect dipoles on properties of Mn doped BCT ceramics

摘要: Abstract Single-phase Mn doped Barium Calcium Titanate (BCT) (Ba0.80Ca0.20Ti1-xMnxO3; x = 0.000, 0.005, 0.010, 0.015 and 0.020) lead free ceramics have been prepared by conventional solid-state reaction method. XRD studies Rietveld refinement confirmed the existence of tetragonal phase (P4mm) for all ceramic compositions. The average grain size increased up to x = 0.005 thereafter it decreased with increase in content BCT Analysis temperature-dependent dielectric study revealed transformation from cubic defect dipole induced anomaly paraelectric region constant (eʹ–T) curve. Degree diffusiveness doping as evaluating diffused transition (DPT) parameters (γ δc) Power Law fitting width (Dʹ) obtained derivative eʹ–T Ferroelectric (P-E loops) that composition x = 0.015 showed highest remnant polarization (Pr) maximum (Pmax) 14.10 μC/cm2 24.20 μC/cm2 respectively. Enhancement energy storage properties applied electric fields observed at room temperature. Maximum density Wrec 190.89 mJ/cm3 an efficiency 48.63% has x = 0.015. A large piezoelectric charge coefficient (d33) 460 pC/N x = 0.020. temperature magnetic measurements shows feeble ferromagnetism samples. These suggest application these multilayer capacitors, storage, high power applications.