A new method for improving the stability of high temperature piezoelectric properties in BiFeO3–BaTiO3 ceramics by regulating the relaxor transition

Tan, Yunchuan; Zhou, Changrong; Wang, Jiang; Su, Di; Yuan, Changlai; Xu, Jiwen; Li, Qingning; Rao, Guanghui

doi:10.1016/j.ssc.2022.114919

Cited by 7 publications

(1 citation statement)

References 35 publications

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“…Figure 5 illustrates the XRD pattern of the co-doped BT powders with different contents of Ho and Mn. The peak positions of the BT co-doped powders slightly shift to the left and the lower angles, especially (200) and (211) [41][42][43]. Furthermore, an increase in the dopants concentration enhances the lattice parameter [18,44].…”

Section: Phase Studymentioning

confidence: 95%

Ho-Mn co-doping in barium titanate piezoceramics via sol-gel process followed by microwave and conventional heating

et al. 2023

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Co-doped barium titanate (BT) piezoceramics are applied in advanced energy harvesting systems. In the present study, Ba1-2xHo2xTi1-xMnxO3 (x=0, 0.02, 0.04, and 0.06) were produced via the sol-gel-assisted solid state co-doping technique followed by microwave and conventional heating. In the current investigation, the synthesizing and phase characterization, allotropic transition, morphological examination, elemental analysis and dielectric-piezoelectric responses were investigated by X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC) and Thermo-Gravimetric Analysis (TGA), Field-Emission Scanning Electron Microscope (FESEM), Energy-Dispersive x-ray Spectroscopy (EDS), Mapping analysis and inductance-Capacitance-Resistance meter (LCR meter) techniques, respectively. The XRD pattern and DSC/ TGA outcomes demonstrated that tetragonal BT phases without minor BaCO3 secondary phases are synthesized properly, and that the negligible unsolicited BaCO3 phases are thoroughly calcined by a microwave at 900℃. Doping resulted in an increase in tetragonality (c/a) of 0.19%, 0.15%, and 0.04%, respectively, compared to the pure calcined BT. Additionally, the crystallite size of BT decreased significantly by 59%, 58%, and 52%, respectively. The results revealed that the microwave-sintered samples have higher purity, drastic delicate and finer grain size distribution, and superior tetragonal-ity with respect to the conventionally sintered furnace samples. Furthermore, the piezoelectric constant for the microwave sintered and the conventionally sintered samples with the same value of x=0.04 were 390 and 370 (pC/N), respectively, which established that the sintering method has satisfactory affection (approximately 6%) on the piezo function of the samples. Eventually, the prepared samples which had 0, 2, 4, and 6 % moles of Ho3+-Mn2+ cations and were sintered by a microwave compared to the similar specimens fabricated by the furnace had superior dielectric constants of 2.6, 1.1, 2.2 and 2.9 times, respectively.

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