Non-debye type conduction mechanism in Gd doped SrBi2Nb2O9 ceramic prepared through single-step microwave sintering method

Pritam, Anurag

doi:10.1016/j.mseb.2024.117297

Materials Science and Engineering: B

2024

DOI: 10.1016/j.mseb.2024.117297

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Non-debye type conduction mechanism in Gd doped SrBi2Nb2O9 ceramic prepared through single-step microwave sintering method

Anurag Pritam

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2025

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Cited by 3 publications

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Multiple relaxation mechanisms in SrBi2Nb2O9 ceramic tweaked by tin and samarium incorporation in assistance with single-step microwave sintering

Pritam,

Bhattacharya,

Sain

et al. 2024

Appl. Phys. A

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Non-stoichiometric lead free polycrystalline Sr0.8Sn0.2Bi1.75Sm0.25Nb2O9 (SSBSN) ferroelectric ceramics were synthesized through conventional solid step route method by incorporating ball milling and microwave sintering method. X-ray diffraction along with the Rietveld refinement technique confirms the single-phase orthorhombic structure with A21 crystal symmetry. Additionally, the short-range ordering was confirmed by Raman spectroscopy. Doping induced crystallite size and strain were further calculated from the Williamson-Hall plot, which comes around 150 nm and 1.48 × 10–3 respectively. A plate like morphology with an average grain size of 0.41 μm was confirmed by scanning electron microscopy (SEM). A diffuse type ferroelectric to paraelectric phase transition was recorded at 395 °C, mostly arising due to structural heterogeneity at the inter-ferroelectric phase boundary. The temperature and frequency-dependent dielectric measurement of SSBSN ceramic reveal a Maxwell–Wagner relaxation, with prominent dielectric loss in a low frequency regime perhaps due to the generation of leakage current in the SSBSN system. Frequency dependent ac conductivity indicates the polaron assisted hopping mechanism in SSBSN, which further obeys Jonscher’s formulation. The intra and intergranular contributions to impedance in SSBSN ceramics were probed by the complex impedance spectroscopy (CIS) technique. A non-Debye type relaxation mechanism in SSBSN ceramics was indicated by the Cole–Cole plot, whereas the conduction mechanism and transport properties were briefly studied using modulus spectroscopy.

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Multiple relaxation mechanisms in SrBi2Nb2O9 ceramic tweaked by tin and samarium incorporation in assistance with single-step microwave sintering

Pritam,

Bhattacharya,

Sain

et al. 2024

Appl. Phys. A

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Polaron assisted hopping mechanism in microwave processed Nd doped second layered aurivillius SrBi2Nb2O9 ceramics

Pritam

2024

Ceramics International

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Structural and ferroelectric modifications in SrBi2Nb2O9 Aurivillius phase compounds by Nd3+ ion doping

Zulhadjri,

Rizki,

Wendari

et al. 2025

Materials Chemistry and Physics

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Non-debye type conduction mechanism in Gd doped SrBi2Nb2O9 ceramic prepared through single-step microwave sintering method

Cited by 3 publications

References 43 publications

Multiple relaxation mechanisms in SrBi2Nb2O9 ceramic tweaked by tin and samarium incorporation in assistance with single-step microwave sintering

Multiple relaxation mechanisms in SrBi2Nb2O9 ceramic tweaked by tin and samarium incorporation in assistance with single-step microwave sintering

Polaron assisted hopping mechanism in microwave processed Nd doped second layered aurivillius SrBi2Nb2O9 ceramics

Structural and ferroelectric modifications in SrBi2Nb2O9 Aurivillius phase compounds by Nd3+ ion doping

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