Fabrication and physical characteristics of K/W double doped BiFeO3 complex electro-ceramic; (Bi1/2K1/2)(Fe1/2W1/2)O3

The main objective of this research work is to investigate the effect of the inclusion of potassium/tungsten (K/W) (at the Bi/Fe site) on the structural, dielectric, electrical, and optical characteristics of eco-friendly BiFeO3 to assess its potential use for multifunctional applications including energy storage. The standard solid-state re -action method was used to synthesize the desired (Bi1/2K1/2)(Fe1/2W1/2)O3 complex compound. Examination of X-ray diffraction data demonstrates the structural transformation of bismuth ferrite from rhombohedral to monoclinic on the addition of K/W. The estimated crystallite size is 52 nm. The standard cell parameters include a =12.1967 angstrom, b = 9.0468 angstrom, c = 6.4971 angstrom, and beta = 105.02 degrees, resulting in a cell volume of 692.40 angstrom 3. Analysis of Raman spectra reveals a slight alteration in intensity and displacement of Raman mode positions, attributed to the doping effect, which confirms the incorporation of K and W ions into the BiFeO3 lattice. Scanning electron microscopy provides an image indicating the dense surface structure of the sample. Elemental analysis through energy-dispersive X-ray spectroscopy verifies the presence and purity of the constituent elements. The material doped with potassium and tungsten exhibits a high dielectric constant (epsilon r -3 x 103) and low tangent loss (tan delta-1). The extensive dielectric studies conducted across various frequencies and temperatures suggest that the sample possesses capacitive properties. The depression angle of 8.51 degrees reflects the extent of deviation from Debye's behavior. The presence of hysteresis loops indicates the presence of ferroelectric behavior.

Automated summary

The main objective of this research is to investigate the effect of adding potassium/tungsten on the characteristics of eco-friendly BiFeO3 and assess its potential applications. The results show that the addition of K/W transforms the structure of bismuth ferrite and the material exhibits high dielectric constant and low tangent loss. This indicates potential capacitive and ferroelectric properties.