Effect of Fe doping on the lattice structure, microscopic morphology and microwave absorption properties of LaCo1-Fe O3

Yuan, Wei; Cheng, Lichun; Xia, Tianrui; Chen, Yu‐Cheng; Long, Qianxing; Yao, Qing; Pan, Shunkang; Hu, Chaohao

doi:10.1016/j.jallcom.2022.166839

Cited by 16 publications

(14 citation statements)

References 63 publications

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“…123 Currently, some transition metal oxides or binary metal oxides are also applied in the absorbing materials, such as Co 3 O 4 , NiO 2 , LaCoO 3 , etc. For example, Yuan et al 124 prepared typically LaCoO 3 (LCO) and LaFe x Co 1−x CO 3 (Fe-LCO) MAMs, and then compared their absorption performance (Figure 8d). The main way for LCO to attenuate microwaves was dielectric loss.…”

Section: Magnetic Oxides-based Mamsmentioning

confidence: 99%

“…Cole–Cole circle of (f) LCO and (g) Fe-LCO . (h) C 0 value of LCO and Fe-LCO . Reprinted with permission from ref .…”

Section: Research Progresses Of Mamsmentioning

confidence: 99%

mentioning

confidence: 99%

“…(d) The preparation process of LCO and Fe-LCO 124. (e) RL values of LaCo 0.9 Fe 0.1 O 3 124. Cole−Cole circle of (f) LCO and (g) Fe-LCO 124.…”

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confidence: 99%

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High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

Zuo,

Jia,

et al. 2023

Ind. Eng. Chem. Res.

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The rapid development of 5G communication technology has led to serious electromagnetic wave pollution, and as a result, it is urgent to develop high-performance microwave absorption materials (MAMs) conducive to reducing electromagnetic pollution, which has great use in both the military and civilian fields. In this review article, we first introduce the absorption theory of microwave absorption materials. Then, the recent research progress in microwave absorption materials categorized as dielectric loss MAMs, magnetic loss MAMs, and electromagnetic synergistic loss MAMs are profoundly reviewed according to absorption mechanism. Subsequently, we proceed to review recent achievements in combining wave absorption with other functions including hydrophobicity, infrared stealth, and selfhealing, aiming at developing advanced multifunctional MAMs adapted to various extreme environments during practical applications. Finally, the challenges are presented, and prospects for potential opportunities in this rapidly blossoming field are discussed accordingly. We hope this critical review is timely, which could provide guidance for those who are committed to designing absorbers with better fundamental understanding and practical application.

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Section: Magnetic Oxides-based Mamsmentioning

confidence: 99%

“…Cole–Cole circle of (f) LCO and (g) Fe-LCO . (h) C 0 value of LCO and Fe-LCO . Reprinted with permission from ref .…”

Section: Research Progresses Of Mamsmentioning

confidence: 99%

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High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

Zuo,

Jia,

et al. 2023

Ind. Eng. Chem. Res.

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“…It makes our daily life more convenient while also triggers a serious issue electromagnetic interference (EMI). Moreover, the demands of antiradar coating for military equipment such as aircraft become more severe due to the improvement of radar systems. − Recently, to relieve the ever-increasing pressure on environment and improve the stealth capability of military equipment, more and more research on improvement of microwave absorption properties of the materials has been undertaken. − …”

Section: Introductionmentioning

confidence: 99%

Determining the Actual Composition of Nb⁵⁺–Ni²⁺ Codoped Barium Ferrites to Controllably Regulate the Microwave Absorbing Properties

et al. 2022

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The substitution amount of foreign ions for Fe3+ ions significantly influences the electromagnetic and microwave absorption performance of barium ferrite. To establish the correlation between composition and property, Nb5+–Ni2+ codoped M-type barium ferrite powders with molar ratio of the added Ba2+, Fe3+, Nb5+, and Ni2+ ions being 1:(12–2x):x:x (x = 0–0.8) were prepared by the sol–gel method. The actual substitution amount of Nb5+ and Ni2+ ions for Fe3+ ions are theoretically determined based on the measured concentrations of Fe2+ ions, surface absorbed oxygen, and the lattice parameters of the doped barium ferrite. The calculation results demonstrate that the substitution amount of Ni2+ ions is obviously lower than that of Nb5+ ions in the doped barium ferrites, while the total substitution amount of Nb5+–Ni2+ is still higher than the only Nb5+ ions doping case. As a result, the multiresonant permeability is obviously achieved and dual reflection loss peaks with broad bandwidth ∼12 GHz are apparently observed in the BFNNO with x = 0.4–0.6 over 18–40 GHz. Moreover, the frequency of reflection loss peaks can be adjusted to cover wider frequency range −18 GHz to +40 GHz with variation of x from 0 to 0.8. The developed theoretical calculation approach provides powerful guidance for the controllable design of material composition and regulation of microwave absorption.

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Origin of Spin‐State Precise Modulation for Enhanced Oxygen Evolution Activity: Effect of Secondary Coordination Sphere

Fang,

Chai,

et al. 2024

Adv Funct Materials

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The process of oxygen evolution reaction (OER) is crucial for energy storage and conversion, and the spin electronic structure of catalyst significantly influences its catalytic activity. Precisely regulating the spin electronic structures of metal active centers with intermediate spin (IS) states is challenging but important. This study presents a general method for achieving spin‐state precise modulation by altering the secondary coordination sphere (SCS) in Fe‐substituted LaCo1‐xFexO3 perovskites, denoted as Co6‐y−[Co]−Fey (y = 0–6). The concentration‐dependent SCSs can precisely regulate the spin state of Co3+ from high‐spin (HS) to IS and low‐spin (LS) state by tuning the Co─O binding energy of primary coordination sphere (PCS) to ≈567 KJ mol−1. The binding energy demonstrates a strong negative correlation with the spin state of Co3+, serving as a quantitative descriptor for precise spin‐state modulation. Furthermore, a universal optimal doping concentration is proposed for generating IS‐state Co3+ with the best OER activity, ranging from 1/(m+1) to 2/(m+1) in M‐doped ACo1‐xMxOy system with the coordination number of m. As a proof‐of‐concept, the LaCo7/9Fe2/9O3 with IS Co3+ exhibits significantly enhanced OER activity, almost six times higher than the control samples (without IS Co3+). These findings provide new insights into spin‐state modulation for effective OER catalysts.

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Effect of Fe doping on the lattice structure, microscopic morphology and microwave absorption properties of LaCo1-Fe O3

Cited by 16 publications

References 63 publications

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

Determining the Actual Composition of Nb⁵⁺–Ni²⁺ Codoped Barium Ferrites to Controllably Regulate the Microwave Absorbing Properties

Origin of Spin‐State Precise Modulation for Enhanced Oxygen Evolution Activity: Effect of Secondary Coordination Sphere

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Effect of Fe doping on the lattice structure, microscopic morphology and microwave absorption properties of LaCo1-Fe O3

Cited by 16 publications

References 63 publications

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

Determining the Actual Composition of Nb5+–Ni2+ Codoped Barium Ferrites to Controllably Regulate the Microwave Absorbing Properties

Origin of Spin‐State Precise Modulation for Enhanced Oxygen Evolution Activity: Effect of Secondary Coordination Sphere

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Determining the Actual Composition of Nb⁵⁺–Ni²⁺ Codoped Barium Ferrites to Controllably Regulate the Microwave Absorbing Properties