Influence of synergistic effect of Mn valence state and oxygen vacancy concentration on microwave absorbing properties of CaMnO3

Liu, Yin; Zhu, Dongmei; Chai, Xia; Qing, Yuchang

doi:10.1016/j.ceramint.2021.12.191

Cited by 27 publications

(2 citation statements)

References 39 publications

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“…RL was used to evaluate the EMW absorption performance. First, according to the transmission line theory, the RL can be calculated based on the tested ε r and µ r values [27,28]:…”

Section: Characterizationmentioning

confidence: 99%

Suppressed conductive loss of flower-like NiCo₂O₄-wrapped flaky FeSiAl for excellent low-frequency microwave absorption

Fu,

He,

Yan

et al. 2024

J. Phys. D: Appl. Phys.

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Flaky FeSiAl is a high potential absorbent for low-frequency microwave applications. However, impedance mismatching due to its excessively high complex permittivity presents a challenge. Herein, inspired by the surface modification strategy, flaky FeSiAl wrapped with flower-like NiCo2O4 (NiCo2O4@flaky FeSiAl) was developed via a hydrothermal method. The introduction of a surface NiCo2O4 insulating layer was expected to reduce the complex permittivity and increase the high complex permeability in the NiCo2O4@flaky FeSiAl composite. Subsequently, an excellent low-frequency microwave absorption performance was achieved. The designed NiCo2O4@flaky FeSiAl displayed a robust minimum refection loss (RLmin) of −33.41 dB at 6.32 GHz and increased the effective absorption bandwidth (EAB, RL＜−10 dB) to 4.08 GHz when the matching thickness was 1.6 mm. The enhanced low-frequency microwave absorption performance was mainly attributed to the improvement in impedance matching, which originated from the collaborative regulation of electromagnetic parameters. This study provides a promising approach for designing flaky FeSiAl-based composites and high-performance low-frequency microwave absorbents.

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“…RL was used to evaluate the EMW absorption performance. First, according to the transmission line theory, the RL can be calculated based on the tested ε r and µ r values [27,28]:…”

Section: Characterizationmentioning

confidence: 99%

Suppressed conductive loss of flower-like NiCo₂O₄-wrapped flaky FeSiAl for excellent low-frequency microwave absorption

Fu,

He,

Yan

et al. 2024

J. Phys. D: Appl. Phys.

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show abstract

“…These results of CMO and SMO are in good agreement with other theoretical predictions and experimental measurements. 56,62,[67][68][69]…”

Section: Electronic Propertiesmentioning

confidence: 99%

The effect of Sr substitution on the structural and physical properties of manganite perovskites Ca_1−xSr_xMnO_3−δ (0 ≤ x ≤ 1)

Lamhani

Chchiyai

Elomrani

et al. 2022

Phys. Chem. Chem. Phys.

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Phase transition kinetics and strengthening mechanism of rutile TiO2 prepared by microwave-enhanced calcination of TiC-doped metatitanic acid

et al. 2023

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Influence of synergistic effect of Mn valence state and oxygen vacancy concentration on microwave absorbing properties of CaMnO3

Cited by 27 publications

References 39 publications

Suppressed conductive loss of flower-like NiCo₂O₄-wrapped flaky FeSiAl for excellent low-frequency microwave absorption

Suppressed conductive loss of flower-like NiCo₂O₄-wrapped flaky FeSiAl for excellent low-frequency microwave absorption

The effect of Sr substitution on the structural and physical properties of manganite perovskites Ca_1−xSr_xMnO_3−δ (0 ≤ x ≤ 1)

Phase transition kinetics and strengthening mechanism of rutile TiO2 prepared by microwave-enhanced calcination of TiC-doped metatitanic acid

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Influence of synergistic effect of Mn valence state and oxygen vacancy concentration on microwave absorbing properties of CaMnO3

Cited by 27 publications

References 39 publications

Suppressed conductive loss of flower-like NiCo2O4-wrapped flaky FeSiAl for excellent low-frequency microwave absorption

Suppressed conductive loss of flower-like NiCo2O4-wrapped flaky FeSiAl for excellent low-frequency microwave absorption

The effect of Sr substitution on the structural and physical properties of manganite perovskites Ca1−xSrxMnO3−δ (0 ≤ x ≤ 1)

Phase transition kinetics and strengthening mechanism of rutile TiO2 prepared by microwave-enhanced calcination of TiC-doped metatitanic acid

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Product

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Suppressed conductive loss of flower-like NiCo₂O₄-wrapped flaky FeSiAl for excellent low-frequency microwave absorption

Suppressed conductive loss of flower-like NiCo₂O₄-wrapped flaky FeSiAl for excellent low-frequency microwave absorption

The effect of Sr substitution on the structural and physical properties of manganite perovskites Ca_1−xSr_xMnO_3−δ (0 ≤ x ≤ 1)