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• W4280490186 endingPage "165303" @default.
• W4280490186 startingPage "165303" @default.
• W4280490186 abstract "Lead-free 0.7BiFeO 3 -0.3BaTi 1−x Mn x O 3 ceramics, where x ranges from 1% -- 10%, were prepared by conventional solid state reaction method. Effect of addition of MnO 2 on the structural, spectral, electrical, magnetic and piezoelectric properties of 0.7BiFeO 3 -0.3BaTiO 3 material were studied systematically. The previous studies have emphasized on the doping in BiFeO 3 rather than doping in BaTiO 3 in BiFeO 3 -BaTiO 3 system. Our work focuses on the influence of Mn doping in BaTiO 3 in the BiFeO 3 -BaTiO 3 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 R 3 c and P 4 mm respectively with a small amount of Bi 25 FeO 40 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 MnO 2 significantly enhanced the electrical and piezoelectric properties of the 0.7BiFeO 3 -0.3BaTiO 3 material. The improved electrical properties at high temperature and low frequencies ε r = 1.8 × 10 9 , σ = 4.1 × 10 −3 S cm −1 and piezoelectric property d 33 = 128 pC/N was obtained for x = 0.10. • XRD revealed that all the synthesized ceramics exhibit a perovskite R and T phases confirming the formation of a stable solid solution. • High dielectric constant which increases with increasing temperatures with high Curie temperature (above 500 °C). • Both grain and grain boundary contributed to electrical conductivity. • The high electrical resistivity was achieved at lower temperature which varies with the dopant concentration. • The maximum phase angle of 89.82° was achieved at 100 °C for a ceramic with highest dopant concentration. • The high d 33 value of 128 pC/ N was obtained for almost all the ceramics." @default.
• W4280490186 created "2022-05-22" @default.
• W4280490186 creator A5004299820 @default.
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• W4280490186 date "2022-10-01" @default.
• W4280490186 modified "2023-09-29" @default.
• W4280490186 title "Effect of Mn doping on the structural, spectral, electrical, ferromagnetic and piezoelectric properties of 0.7BFO-0.3BTO lead-free ceramics" @default.
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• W4280490186 doi "https://doi.org/10.1016/j.jallcom.2022.165303" @default.
• W4280490186 hasPublicationYear "2022" @default.
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