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<p>In this investigation, we report the synthesis of barium iron tantalate (BaFe<sub>0.5</sub>Ta<sub>0.5</sub>O<sub>3</sub>; BFT) utilizing the molten salt method. The process yielded pure-phase perovskite powders at the relatively low calcination temperature of 700&#xa0;°C. Subsequent fabrication of BFT ceramics from these calcined powders revealed notable properties. X-ray diffraction (XRD) analysis confirmed the cubic symmetry of the ceramics. All samples exhibited pronounced frequency-dependent dielectric behavior, with those sintered at 1,250&#xa0;°C demonstrating particularly remarkable properties. Specifically, these ceramics achieved exceptionally high dielectric constants (ε<sub>r</sub> ~ 5.30 × 10<sup>5</sup> at 1&#xa0;kHz and 230&#xa0;°C). Impedance spectroscopic analysis revealed that the dielectric behavior of the ceramics can be attributed to the Maxwell–Wagner polarization mechanism, as the ceramics demonstrated heterogeneous conduction.</p>

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Enhanced dielectric properties of BaFe0.5Ta0.5O3 ceramics synthesized via molten salt technique

  • 期刊论文

  • 发表日期：

    2025年3月24日

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  • Thanatep Phatungthane,
  • Ratabongkot Sanjoom,
  • Suriya Prasomthong,
  • Gobwute Rujijanagul

摘要

In this investigation, we report the synthesis of barium iron tantalate (BaFe0.5Ta0.5O3; BFT) utilizing the molten salt method. The process yielded pure-phase perovskite powders at the relatively low calcination temperature of 700 °C. Subsequent fabrication of BFT ceramics from these calcined powders revealed notable properties. X-ray diffraction (XRD) analysis confirmed the cubic symmetry of the ceramics. All samples exhibited pronounced frequency-dependent dielectric behavior, with those sintered at 1,250 °C demonstrating particularly remarkable properties. Specifically, these ceramics achieved exceptionally high dielectric constants (εr ~ 5.30 × 105 at 1 kHz and 230 °C). Impedance spectroscopic analysis revealed that the dielectric behavior of the ceramics can be attributed to the Maxwell–Wagner polarization mechanism, as the ceramics demonstrated heterogeneous conduction.