Impedance behaviors of Nd-doped BiFeO3 ceramics with 0.10 ≤ x ≤ 0.30

Zhou, Yi; Huang, Xiaohua; Jiang, Lei; Hou, Ying; Lin, Hong-Yi; Cheng, Zaijun; Sun, Dong

doi:10.1007/s10854-022-09251-0

Cited by 4 publications

(2 citation statements)

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“…Meanwhile, it can be noted that the resistance of the samples decreases with the increasing temperature, exhibiting a semiconductor-like characteristic. The presence of a single semicircle in the high-frequency region indicates the dominated contribution of grain effects to the resistance in the BNZ-doped samples [19] . Unfortunately, the impedance spectroscopy low sensitivity to small resistances can hamper the study of grain boundary effects.…”

Section: Resultsmentioning

confidence: 99%

“…Combining frequency-dependent normalized Z''/ Z'' max and M''/ M'' max plots can help distinguish the bulk material's localized relaxation and long-range conductivity. Earlier studies have indicated that the coincidence of the peak frequencies of Z''/ Z'' max and M''/ M'' max indicates long-range carrier conduction, while their separation represents short-range conduction where charge carriers can only undergo short-range hopping motions [19] . Figure 4(a)-(d) depicts the normalized curves of Z''/ Z'' max and M''/ M'' max for the BNZ-doped samples with 0.05 ≤ x ≤ 0.2.…”

Section: Resultsmentioning

confidence: 99%

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Study on the dielectric and impedance behavior of (1-x) K0.5Na0.5NbO3-xBi(Ni0.5Zr0.5)O3 ceramics with 0 ≤ x ≤ 0.2

zheng,

Huang,

Xun

2024

Fifth International Conference on Optoelectronic Science and Materials (ICOSM 2023)

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The (1-x)K 0.5 Na 0.5 NbO 3 -xBi(Ni 0.5 Zr 0.5 )O 3 [(1-x)KNN-xBNZ] ceramics with 0 ≤ x ≤0.2 were prepared by the solid-state method. The (1-x)KNN-xBNZ samples with 0.05 ≤ x ≤ 0.2 formed solid solutions with a stable perovskite structure and exhibited a cubic phase at room temperature. The sample with x=0.2 shown outstanding thermal robustness within the range of -35°C to 260°C, suggesting substantial promise for utilization in high-temperature multilayer ceramic capacitors. A systematic study of impedance spectra and modulus spectra plotted in various forms indicates the dominant grain effect in the single non-Debye thermally activated relaxation process for the BNZ-doped samples except the composition with x = 0.1. The grain and grain boundary effects may make the contribution to the relaxation process of the composition with x = 0.1. The frequency-related normalized impedance spectra and the calculated activation energy suggest that the conductive behavior and the relaxation process within the system of (1-x)KNN-xBNZ may be associated with the short-range movement of doubly ionized oxygen vacancies.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%