The microstructure and thermo–electrical characterization of the Tb–Gd–Ho co–doped stabilized Bi2O3 based solid electrolyte systems

Balcı, Murat; Cengel, Atakan; Matmon, Ari

doi:10.1016/j.cjph.2022.08.005

Cited by 8 publications

(1 citation statement)

References 34 publications

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“…In addition, the appearance of the tetragonal SeO 2 phases in the structure of MgSe could account for the decrease in the lattice constant values [18]. Moreover, substitutions of excess selenium with lower ionic radius (50 pm [9]) in vacant sites of oxygen (140 pm [9]) could also be a reason for the decrease in the lattice parameter and decrease in the defect density, microstrain and stacking faults as well [9,19]. at.…”

Section: Resultsmentioning

confidence: 99%

ITO/MgSe interfaces designed as gigahertz/terahertz filters

Almotiri

Qasrawi

2023

Phys. Scr.

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Herein a new class of MgSe gigahertz/terahertz band filters operatives in the frequency domain of 1.0 GHz-1.86 THz is fabricated and experimentally tested. MgSe band filters are coated onto glass and indium tin oxide (ITO) substrates by the thermal evaporation technique under a vacuum pressure of 10-5 mbar. Thin films of MgSe are structurally, morphologically, compositionally, optically and electrically characterized. It is observed that ITO substrates induce the growth of monophasic of MgSe, enhances the crystallinity of the films and blueshifts the energy band gaps of MgSe. Practical applications were verified by impedance spectroscopy technique through imposing an ac signal of driving frequency in the domain of 10.0 MHz-1.8 GHz between the terminals of ITO/MgSe/Au (IMA) devices. It is observed that the IMA devices exhibit negative capacitance effect. Analysis of the cutoff frequency spectra has shown that IMA devices can reveal wide range of tunability in the gigahertz frequency domain. In addition, the cutoff frequency spectra show values reaching ~1.86 THz for signals of driving frequencies of ~1.0 GHz. Evaluation of the magnitude of the reflection coefficient spectra and return loss spectra for these devices show that the IMA devices can perform as bandstop filters with return loss values exceeding 20 dB at 1.0 GHz. The features of the ITO/MgSe/Au devices are appropriate for the 5G/6G technology needs indicating that the device can be employed in communication technology and other gigahertz/terahertz applications.

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Section: Resultsmentioning

confidence: 99%

ITO/MgSe interfaces designed as gigahertz/terahertz filters

Almotiri

Qasrawi

2023

Phys. Scr.

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A study of the microstructure and thermo–electrical properties of Bi2O3 ceramics co–doped with rare earth oxides

Balcı

Matmon²

2023

J Mater Sci: Mater Electron

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Structural, thermal, surface, and electrical properties of Bi2O3 ceramics co–doped with Er–Ho–Tb rare earths

Balci

2024

J Aust Ceram Soc

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Face–centered cubic–Bi2O3 (δ–phase) material is a better ion conductor when compared to other types of solid electrolytes that have been declared in the literature due to its anion–defective crystal configuration, and hence it can be a promising solid electrolyte choice for intermediate temperature SOFC applications. In this research, Er–Ho–Tb co–doped Bi2O3 compounds were successfully synthesized by the solid–state reaction method and characterized using the XRD, TG & DTA, FPPT, and FE–SEM techniques. Apart from sample 4Er4Ho4Tb, each sample became stable with a cubic δ–phase at room temperature, according to XRD patterns. The DTA curves revealed no exothermic or endothermic peaks, implying a phase change in the constant heating cycle. The conductivity of Ho–rich compositions was higher than that of others, confirming the impact of cation polarizability on conductivity. In addition, at 700 °C, the sample 4Er8Ho4Tb with 1:2:1 content ratios had the highest conductivity of 0.29 S/cm. The porosity on the grain boundaries increased with doping, leading to higher grain boundary resistance, which could be responsible for the conductivity drop.

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The microstructure and thermo–electrical characterization of the Tb–Gd–Ho co–doped stabilized Bi2O3 based solid electrolyte systems

Cited by 8 publications

References 34 publications

ITO/MgSe interfaces designed as gigahertz/terahertz filters

ITO/MgSe interfaces designed as gigahertz/terahertz filters

A study of the microstructure and thermo–electrical properties of Bi2O3 ceramics co–doped with rare earth oxides

Structural, thermal, surface, and electrical properties of Bi2O3 ceramics co–doped with Er–Ho–Tb rare earths

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