Thanatep Phatungthane, Ratabongkot Sanjoom, Suriya Prasomthong, Gobwute Rujijanagul
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Enhanced dielectric properties of BaFe0.5Ta0.5O3 ceramics synthesized via molten salt technique
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.
期刊介绍：
While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including:
-insulating to metallic and fast ion conductivity
-piezo-, ferro-, and pyro-electricity
-electro- and nonlinear optical properties
-feromagnetism.
When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice.
The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.
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