Selective microwave absorption in Nd3+ substituted barium ferrite composites

Widanarto, Wahyu; Khaeriyah, Siti; Ghoshal, Sib Krishna; Kurniawan, Candra; Effendi, Mukhtar; Cahyanto, Wahyu Tri

doi:10.1016/j.jre.2019.01.008

Cited by 21 publications

(12 citation statements)

References 27 publications

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“…Thus, we conclude that there is no solid solution based on BaFe 2 O 4 at 1373 K in air, or its homogeneity range is negligible and, thus, that the enhanced properties come from a composite effect in agreement with the results reported in ref. 6 Goel et al 10 In contrast to related ½Nd 2 O 3 -SrO-½Fe 2 O 3 system, 61 in Ba-containing one we fail to detect other RP-type phases (n = 1 and 3) except Ba 1.1 Nd 1.9 Fe 2 O 7-δ (n = 2). Based on its chemical formula, Ba 6 Nd 2 Fe 4 O 15-δ could have been formally attributed to K 2 NiF 4 -type (RP n = 1), but its crystal structure is completely different.…”

Section: N = 2 Ruddlesden-popper Ba 11 Nd 19 Fe 2 O 7-δ Oxidecontrasting

confidence: 54%

“…Recently partially Ba-substituted neodymium ferrites attracted increased attention due to various potential applications. For instance, Nd 1-x Ba x FeO 3-δ perovskite-type oxides were examined as promising cathode materials for intermediate-temperature solid oxide full cells (SOFCs), [1][2][3][4][5] the Nd-doped BaFe 2 O 4 composite was considered as a new material for use in electronic devices for wireless communication [6][7][8][9] and the permanent magnets of general formula BaFe 12 O 19 were modified by addition of Nd 2 O 3 in order to improve the magnetic properties of this hexaferrite. 10,11 It was shown that the doped compos-ites enriched in Ba 6 Nd 2 Fe 4 O 15 and BaFe 2 O 4 phases could absorb microwaves selectively in the X-band.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, Nd 1‐ x Ba x FeO 3‐ δ perovskite‐type oxides were examined as promising cathode materials for intermediate‐temperature solid oxide full cells (SOFCs), 1–5 the Nd‐doped BaFe 2 O 4 composite was considered as a new material for use in electronic devices for wireless communication 6–9 and the permanent magnets of general formula BaFe 12 O 19 were modified by addition of Nd 2 O 3 in order to improve the magnetic properties of this hexaferrite 10,11 . It was shown that the doped composites enriched in Ba 6 Nd 2 Fe 4 O 15 and BaFe 2 O 4 phases could absorb microwaves selectively in the X‐band 6 . Neodymium ferrite NdFeO 3 was considered as CO 2 sensor, 12 as a new electrocatalytic material for the electrochemical monitoring of dopamine, 13 and as multiferroic material 14 .…”

Section: Introductionmentioning

confidence: 99%

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Phase equilibria in the Nd₂O₃–BaO–Fe₂O₃ system: Crystal structure, oxygen content, and properties of intermediate oxides

et al. 2022

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The phase equilibria in the ½Nd 2 O 3 -BaO-½Fe 2 O 3 system were systematically studied at 1373 K in air and presented in the form of a phase diagram. By X-ray diffraction (XRD) analysis of quenched samples, the homogeneity ranges and crystal structure were determined for the following intermediate oxides: Nd 1-x Ba x FeO 3-δ with 0.0 ≤ x ≤ 0.05 (space group (SG) Pnma) and with 0.6 ≤ x ≤ 0.7 (SG Pm-3m), Ba 6+y Nd 2-y Fe 4 O 15-δ with 0.0 ≤ y ≤ 0.4 (SG P6 3 mc), and Ba 1.1 Nd 1.9 Fe 2 O 7-δ (SG P4 2 /mnm). The structural parameters of single-phase oxides were refined by the Rietveld method. The changes in oxygen content for Nd 1-x Ba x FeO 3-δ (0.6 ≤ x ≤ 0.7), Ba 6 Nd 2 Fe 4 O 15-δ , and Ba 1.1 Nd 1.9 Fe 2 O 7-δ versus temperature in air were determined by thermogravimetric analysis. Gradual substitution of neodymium by barium in the Nd 1-x Ba x FeO 3-δ (0.6 ≤ x ≤ 0.7) oxides leads to a decrease of oxygen content. Partial ordering via formation of separate domains with a p × a p × 5a p superstructure in Nd 0.4 Ba 0.6 FeO 3-δ , which cannot be detected by XRD, noticeably influence its thermal expansion and electrical conductivity.

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Section: N = 2 Ruddlesden-popper Ba 11 Nd 19 Fe 2 O 7-δ Oxidecontrasting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phase equilibria in the Nd₂O₃–BaO–Fe₂O₃ system: Crystal structure, oxygen content, and properties of intermediate oxides

et al. 2022

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“…In recent years, electronic devices and wireless communications which act in the range of microwave frequency or X-band (8-12 GHz) are widely developed [1]. With the development of electronic devices, electromagnetic interference (EMI) has become a serious concern.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the improvements in the technology of radar detection have increased the demand for microwave absorbing layers [2]. The microwave absorbing materials should be able to attenuate and dissipate the microwave energy through dielectric loss and magnetic loss mechanisms [1]. An ideal absorbing material should possess a broad absorption frequency, strong absorption capability, and lightweight [3].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Wave Absorption Properties of Barium Ferrite/Reduced Graphene Oxide Nanocomposites

2021

IJE

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Reduced graphene oxide (rGO) and M-type hexagonal ferrites such as BaFe12O19 have attracted great attention as electromagnetic (EM) wave absorbing materials in recent years. In this research, different weight percents of BaFe12O19/rGO nanocomposites were incorporated into the microwave absorbing layers and their EM wave absorption was investigated. Barium ferrite was synthesized through the coprecipitation method. Graphene oxide (GO) was synthesized through the modified Hummers' method. The synthesized GO was reduced to rGO nanosheets using a reducing agent. The synthesized barium ferrite and rGO were then mechanically milled to form BaFe12O19/rGO nanocomposite. The chemical bondings, phase analysis, magnetic properties, particle morphology, and EM wave absorbing properties were investigated using FTIR, XRD, Vibration Sample Magnetometer (VSM), FESEM, and Vector Network Analyzer (VNA), respectively. The saturation magnetization (Ms) and the coercivity (Hc) of the synthesized BaFe12O19/rGO nanocomposite were 31 emu/g and 1.5 kOe, respectively. The EM absorption properties in the X-band (8.2-12.4 GHz) showed that the maximum reflection loss (RL) of -7.39 dB could be obtained for the nanocomposite containing only 10 wt. % of BaFe12O19/rGO nanocomposite in a resin matrix with a thickness of 2 mm.

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Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

Mohammed

Mohammed²,

Srivastava

2022

Cryst. Res. Technol.

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With the fast growth of wireless communication technology in high‐frequency ranges, electromagnetic (EM) interference has become a growing concern that has drawn international attention. The development of materials that can absorb EM radiation is a crucial solution. This review provides a detailed overview of ferrites, specifically hexagonal ferrites and their composites for microwave (MW) absorption. It examines hexagonal ferrite classifications based on the stacking order of their fundamental blocks and their synthesis methods and strategies for improving their magnetic properties. On the other hand, this review included a detailed examination of hexagonal ferrites–conducting polymer, hexagonal ferrites–2D materials, and hexagonal ferrite–other nanomaterials composites for MW absorption applications. Enhancing MW absorption in hexagonal ferrites‐based microwave absorption materials (MAMs) regulates their EM characteristics, improves impedance matching, and creates a diversity of loss mechanisms. In addition, the limitations, challenges, and opportunities of hexagonal ferrites‐based MAMs are discussed, which will be helpful to those working in related areas. As a general application potential, it is worth mentioning that, as a result of recent promising findings in the synthesis of hexagonal ferrites‐based composites, hexaferrite‐based composites are suitable devices in the area of microwave absorption.

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Selective microwave absorption in Nd3+ substituted barium ferrite composites

Cited by 21 publications

References 27 publications

Phase equilibria in the Nd₂O₃–BaO–Fe₂O₃ system: Crystal structure, oxygen content, and properties of intermediate oxides

Phase equilibria in the Nd₂O₃–BaO–Fe₂O₃ system: Crystal structure, oxygen content, and properties of intermediate oxides

Electromagnetic Wave Absorption Properties of Barium Ferrite/Reduced Graphene Oxide Nanocomposites

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

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Selective microwave absorption in Nd3+ substituted barium ferrite composites

Cited by 21 publications

References 27 publications

Phase equilibria in the Nd2O3–BaO–Fe2O3 system: Crystal structure, oxygen content, and properties of intermediate oxides

Phase equilibria in the Nd2O3–BaO–Fe2O3 system: Crystal structure, oxygen content, and properties of intermediate oxides

Electromagnetic Wave Absorption Properties of Barium Ferrite/Reduced Graphene Oxide Nanocomposites

Recent Progress in Hexagonal Ferrites Based Composites for Microwave Absorption

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Product

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Phase equilibria in the Nd₂O₃–BaO–Fe₂O₃ system: Crystal structure, oxygen content, and properties of intermediate oxides

Phase equilibria in the Nd₂O₃–BaO–Fe₂O₃ system: Crystal structure, oxygen content, and properties of intermediate oxides