Optimized electromagnetic shielding properties using bismuth-doped barium hexaferrite nanoparticles

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Polyhedron Pub Date : 2025-02-15 Epub Date: 2024-12-31 DOI:10.1016/j.poly.2024.117384

Neha Thakur , Indu Sharma , Prashant Thakur , Khalid Mujasam Batoo , Sagar E. Shirsath , Gagan Kumar

{"title":"Optimized electromagnetic shielding properties using bismuth-doped barium hexaferrite nanoparticles","authors":"Neha Thakur , Indu Sharma , Prashant Thakur , Khalid Mujasam Batoo , Sagar E. Shirsath , Gagan Kumar","doi":"10.1016/j.poly.2024.117384","DOIUrl":null,"url":null,"abstract":"<div><div>Bismuth-doped M-type Barium hexagonal ferrite nanoparticles were prepared through the citrate-precursor route to examine their electromagnetic shielding properties. X-ray diffraction and Rietveld refinement confirmed the single-phase nature of the sample with a hexagonal structure having space group P63/mmc. Raman spectroscopy shows the presence of peaks at 172, 218, 285, 320, 405, 514, 604, and 677 cm−1 corresponding to various vibrations, including E1g, A1g, and E2g symmetries, and indicate octahedral and bipyramidal site interactions. UV–visible spectroscopy showed that increasing Bi2+ content decreased the band gap values from 1.5 eV to 1.49 eV. Field Emission Scanning Electron Microscopy and Transmission Electron Microscopy showed increased grain size with increasing Bi2+ doping and lies between 97 to 107 nm. Magnetic studies identified ferromagnetic behaviour with a significant coercivity (Hc) in the doped samples. Composition Bi0.3Ba0.7Fe12O19 with a 3 mm thickness showed a maximum reflection of −15.24 dB with 54.91 dB absorption of 11.05 GHz frequency range. The sample’s remarkable reflection and higher absorbance frequencies make it an appropriate material choice for future radar applications, particularly within the X-band frequency range (8–12 GHz).</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"268 ","pages":"Article 117384"},"PeriodicalIF":2.6000,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polyhedron","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0277538724005606","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/12/31 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}

引用次数: 0

Abstract

Bismuth-doped M-type Barium hexagonal ferrite nanoparticles were prepared through the citrate-precursor route to examine their electromagnetic shielding properties. X-ray diffraction and Rietveld refinement confirmed the single-phase nature of the sample with a hexagonal structure having space group P₆₃/mmc. Raman spectroscopy shows the presence of peaks at 172, 218, 285, 320, 405, 514, 604, and 677 cm⁻¹ corresponding to various vibrations, including E_1g, A_1g, and E_2g symmetries, and indicate octahedral and bipyramidal site interactions. UV–visible spectroscopy showed that increasing Bi²⁺ content decreased the band gap values from 1.5 eV to 1.49 eV. Field Emission Scanning Electron Microscopy and Transmission Electron Microscopy showed increased grain size with increasing Bi²⁺ doping and lies between 97 to 107 nm. Magnetic studies identified ferromagnetic behaviour with a significant coercivity (Hc) in the doped samples. Composition Bi_0.3Ba_0.7Fe₁₂O₁₉ with a 3 mm thickness showed a maximum reflection of −15.24 dB with 54.91 dB absorption of 11.05 GHz frequency range. The sample’s remarkable reflection and higher absorbance frequencies make it an appropriate material choice for future radar applications, particularly within the X-band frequency range (8–12 GHz).

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

利用掺铋六铁钡纳米粒子优化电磁屏蔽性能

采用柠檬酸盐前驱体法制备了掺杂铋的m型钡六方铁氧体纳米粒子，并对其电磁屏蔽性能进行了研究。x射线衍射和Rietveld细化证实了样品的单相性质，具有空间群P63/mmc的六边形结构。拉曼光谱显示，在172、218、285、320、405、514、604和677 cm−1处存在峰，对应于各种振动，包括E1g、A1g和E2g对称，并表明八面体和双锥体的相互作用。紫外可见光谱分析表明，Bi2+含量的增加使带隙值从1.5 eV降低到1.49 eV。场发射扫描电镜和透射电镜显示，随着Bi2+掺杂量的增加，晶粒尺寸逐渐增大，在97 ~ 107 nm之间。磁性研究表明，掺杂样品具有显著的矫顽力（Hc）。厚度为3 mm的Bi0.3Ba0.7Fe12O19在11.05 GHz频率范围内的最大反射为- 15.24 dB，吸收为54.91 dB。样品的显著反射和更高的吸光度频率使其成为未来雷达应用的合适材料选择，特别是在x波段频率范围内（8-12 GHz）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.