Effect of ratios of dopant contents on the electrical conductivity of Bi2O3 ceramics co–doped with some rare earth oxides

Balcı, Murat; Saatci, Buket; Turk, Hasan; Matmon, Ari

doi:10.1016/j.mtcomm.2022.104542

Cited by 5 publications

(1 citation statement)

References 41 publications

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“…Other works with Bi 2 O 3 quaternary systems have reached 0.0275 S‐cm −1 at 700 °C. [ 39 ] Here, the maximum Sc 3+ concentration (0.06) reached 0.102 Scm −1 at 700 °C (see Table 2 ). The ionic conductivity results appear similar at intermediate temperatures for neodymium and rhenium double‐doped δ‐Bi 2 O 3 phase (ternary system), [ 8 ] and superior to (Bi 2 O 3 ) (0.8– x ) (Tb 4 O 7 ) 0.1 (Ho 2 O 3 ) 0.1 (Dy 2 O 3 ) x quaternary systems [ 40 ] and (Bi 2 O 3 ) 1− x − y (CeO 2 ) x (Eu 2 O 3 ) y ternary systems.…”

Section: Resultsmentioning

confidence: 84%

Dielectric and Optical Properties of δ‐Bi₂O₃ Quaternary Semiconducting Solid Solutions

Ramirez-Dela Cruz,

Bocanegra-Bernal,

Márquez-Torres

et al. 2024

Physica Status Solidi (a)

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Quaternary compositions of polycrystalline Bi1.74Dy0.14W0.12−xScxO3 (x = 0.02, 0.03, 0.04, 0.05, 0.06) solid solutions are synthesized by the solid‐state reaction method. The 4a site symmetry of the space group occupied by Sc3+ ion retains the cubic fluorite‐type over a wide temperature range (450–700 °C) for low Sc3+ content without losing the δ‐phase. Dielectric and ionic conductivity by complex impedance in the frequency range from 0.1 to 100 kHz suggests a temperature‐ and Sc3+‐dependent relaxation process. The ionic conductivity increases with the Sc3+ content over the whole tested temperature range. An oxygen ion conductivity of 0.102 Scm−1 at 700 °C and an activation energy of 0.32 eV are achieved for x = 0.06. Optical properties and Rietveld refinement indicate a bandgap reduction due to a bond length reduction (Bi—O). These materials have potential in photocatalysis and water‐splitting technology due to their UV and visible region absorption capabilities.

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Section: Resultsmentioning

confidence: 84%

Dielectric and Optical Properties of δ‐Bi₂O₃ Quaternary Semiconducting Solid Solutions

Ramirez-Dela Cruz,

Bocanegra-Bernal,

Márquez-Torres

et al. 2024

Physica Status Solidi (a)

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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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Structural investigations, enhanced dielectric and electrical characteristics of iron-doped Bi2O3 thin films designed for high-frequency applications

Qasrawi,

Atari

2024

J Aust Ceram Soc

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Effect of ratios of dopant contents on the electrical conductivity of Bi2O3 ceramics co–doped with some rare earth oxides

Cited by 5 publications

References 41 publications

Dielectric and Optical Properties of δ‐Bi₂O₃ Quaternary Semiconducting Solid Solutions

Dielectric and Optical Properties of δ‐Bi₂O₃ Quaternary Semiconducting Solid Solutions

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

Structural investigations, enhanced dielectric and electrical characteristics of iron-doped Bi2O3 thin films designed for high-frequency applications

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Effect of ratios of dopant contents on the electrical conductivity of Bi2O3 ceramics co–doped with some rare earth oxides

Cited by 5 publications

References 41 publications

Dielectric and Optical Properties of δ‐Bi2O3 Quaternary Semiconducting Solid Solutions

Dielectric and Optical Properties of δ‐Bi2O3 Quaternary Semiconducting Solid Solutions

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

Structural investigations, enhanced dielectric and electrical characteristics of iron-doped Bi2O3 thin films designed for high-frequency applications

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Product

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Dielectric and Optical Properties of δ‐Bi₂O₃ Quaternary Semiconducting Solid Solutions

Dielectric and Optical Properties of δ‐Bi₂O₃ Quaternary Semiconducting Solid Solutions