首页|Effect of Mn doping on the structural, spectral, electrical, ferromagnetic and piezoelectric properties of 0.7BFO-0.3BTO lead-free ceramics
Effect of Mn doping on the structural, spectral, electrical, ferromagnetic and piezoelectric properties of 0.7BFO-0.3BTO lead-free ceramics
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NSTL
Elsevier
? 2022 Elsevier B.V.Lead-free 0.7BiFeO3-0.3BaTi1?xMnxO3 ceramics, where x ranges from 1% – 10%, were prepared by conventional solid state reaction method. Effect of addition of MnO2 on the structural, spectral, electrical, magnetic and piezoelectric properties of 0.7BiFeO3-0.3BaTiO3 material were studied systematically. The previous studies have emphasized on the doping in BiFeO3 rather than doping in BaTiO3 in BiFeO3-BaTiO3 system. Our work focuses on the influence of Mn doping in BaTiO3 in the BiFeO3-BaTiO3 system. All the ceramics were calcined at the optimum temperature of 800 °C to minimize the impurity phases to a great extent. The synthesized ceramics have a co-existence of R and T phases with a space group of R3c and P4mm respectively with a small amount of Bi25FeO40 impurity. The sample for x = 0.01 has R as the host phase rather than T phase, but as the concentration of Mn increases to 0.10, the R phase and T phase start forming a more stable solid solution. Additionally, the doping effect of Mn on grain and grain boundary was studied at 300 °C and illustrated by their equivalent circuits with the help of ZView 2 software. The grain resistance decreased significantly for the sample with x = 0.10. Hence, the addition of MnO2 significantly enhanced the electrical and piezoelectric properties of the 0.7BiFeO3-0.3BaTiO3 material. The improved electrical properties at high temperature and low frequencies εr =1.8 × 109, σ = 4.1 × 10?3 S cm?1 and piezoelectric property d33 = 128 pC/N was obtained for x = 0.10.
NSTL
Elsevier
