Enhancement in the dielectric properties of Sm doped BaTiO3 bulk ceramics

Kumari, Anju; Vij, Ankush; Hashim, Mohd.; Dubey, A.; Kumar, Shalendra

doi:10.1063/1.5051268

Cited by 4 publications

(3 citation statements)

References 11 publications

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Section: Resultsmentioning

confidence: 95%

“…Sm 3+ doping led to significant changes in the E b of the NBST ceramic system. The observed changes were found to have a strong correlation with the size of the grains, as evidenced by E b and grain size (G) ( ) 38 During Sm 3+ doping, Sm 3+ enters the material and replaces the Ti 4+ position. This doping process may cause lattice distortion and charge redistribution of the material, which changes the structure and polarization behavior of the NBT ceramics.…”

Section: Ferroelectric Properties Of Nbsts X Ceramicsmentioning

confidence: 95%

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Energy Storage and Charge/Discharge Performance of Sm-Doped NBT-Based Lead-Free Ceramics

Zhao,

Zhang,

et al. 2023

ACS Appl. Electron. Mater.

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(Na0.5Bi0.5)0.75Sr0.25TiO3–x Sm2O3 ceramics (denoted as NBSTS x ) were obtained by the solid-state reaction method, and their crystal structure and morphological characteristics were characterized by X-ray diffractometer mapping (XRD) and scanning electron microscopy (SEM). The NBSTS x ceramics, when doped with a concentration of x = 0.03, demonstrated outstanding performance in terms of maximum recoverable energy storage density (W rec ∼ 3.35 J/cm3) and energy storage efficiency (η ∼ 84.8%). This ceramic exhibited the highest potential at an electric field strength of 210 kV/cm. Additionally, the thermal stability of NBSTS0.03 ceramic remained constant within the temperature range of 30–90 °C, while their frequency stability covered the range of 10–1000 Hz. By analyzing the dielectric spectra of the material, we investigated the variation of the relative permittivity (εr ) and the dielectric loss angle tangent (tan δ), and we probed the relaxation behavior by means of a modified Curie–Weiss law. The NBSTS x ceramic with a density of x = 0.03 exhibited a fast charge/discharge rate of 128 ns and a discharge energy density of 1.06 J/cm3. From the impedance spectra, the relaxation phenomena observed in the system could potentially be attributed to the migration of oxygen vacancies.

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Section: Resultsmentioning

confidence: 95%

Section: Ferroelectric Properties Of Nbsts X Ceramicsmentioning

confidence: 95%

Energy Storage and Charge/Discharge Performance of Sm-Doped NBT-Based Lead-Free Ceramics

Zhao,

Zhang,

et al. 2023

ACS Appl. Electron. Mater.

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“…Neem (Azadirachta indica) is a popular medicinal plant famous for its therapeutic uses [33]. Neem have showed good in vitro antibacterial activity [34].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of antimicrobial and synergistic effects of some medicinal plant extracts on antimicrobial resistant organisms

Ghandour

Abdelrahim

Bayoumi

et al. 2021

Microbes and Infectious Diseases

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Background: To evaluate antimicrobial activity of ten plant extracts on antimicrobial resistant organisms and investigate interactions of these extracts with antimicrobials against resistant organisms. Methods: The antimicrobial potential of ethanolic leaf extract of Aberia caffra Hook. f. & Harv., Azadirachta indica L., Dodonaea viscosa L., Ficus nitida L., Lanatana camara L., Myrtus communis L., Olea europaea L., Ruta graveolens, Schinus terebinthifolius Raddi and Vitex agnus-castus L. was investigated against eleven drug resistant organisms by agar well diffusion method. The interaction of these extracts with antimicrobials was assessed. Results: Ethanolic extracts of Dodonaea viscosa leaves had antibacterial activity against ESBL-producing Escherichia coli (E. coli) quinolone resistant Salmonella typhi (S. typhi) and ESBL and carbapenemase-producing Klebsiella pneumonia (K. pneumonia). Schinus terebinthifolius Raddi leaves showed antibacterial activity against ESBL and carbapenemase-producing K. pneumoniae and fluconazole resistant C. albicans. Myrtus communis leave extracts demonstrated activity against ESBLproducing E. coli and fluconazole resistant A. fumigatus. Ruta graveolens L. revealed activity against quinolone resistant S. typhi and fluconazole resistant A. fumigatus. Vitex agnus-castus, Aberia caffra Hook. f. & Harv. and Azadirachta indica L. leaf extracts had activity against ESBL-producing E. coli. Olea europaea L. had activity against quinolone resistant A. baumannii. Ruta graveolens L. and Myrtus communis L. were the only extracts showing synergistic effect in association with voriconazole against fluconazole resistant A. fumigatus. Conclusion: Tested plant leaf extracts had great potential as antimicrobial agents against at least one drug resistant microorganism. Isolation of active components and further studies are needed to evaluate the efficacy and toxicity of these products.

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Improved dielectric and ferroelectric properties near Morphotropic phase boundary in Sm3+ modified BZT-BCT ceramics

Neha,

Mehta,

Bhatnagar

et al. 2024

Journal of Physics and Chemistry of Solids

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Enhancement in the dielectric properties of Sm doped BaTiO3 bulk ceramics

Cited by 4 publications

References 11 publications

Energy Storage and Charge/Discharge Performance of Sm-Doped NBT-Based Lead-Free Ceramics

Energy Storage and Charge/Discharge Performance of Sm-Doped NBT-Based Lead-Free Ceramics

Evaluation of antimicrobial and synergistic effects of some medicinal plant extracts on antimicrobial resistant organisms

Improved dielectric and ferroelectric properties near Morphotropic phase boundary in Sm3+ modified BZT-BCT ceramics

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