Scholarlink

<p>Electromagnetic pollution is a big challenge in today’s wireless technological environment. Microwave absorbers are designed to mitigate this problem. These are the materials that absorb electromagnetic radiation and mitigate its harmful effects on humans and electronic devices. Magnatoplumbite (M-type) hexaferrites with the molecular formula SrCo<sub>y</sub>Zr<sub>y</sub>Fe<sub>12-2y</sub>O<sub>19</sub> were developed utilizing the sol–gel synthesis technique for microwave absorber applications. X-ray diffraction (XRD) was performed to investigate the structural purity of these synthesized hexaferrites. For the investigation on morphology, scanning electron microscopy (SEM) was done. An investigation on the magnetic characteristics was performed using different parameters like saturation magnetization (<i>M</i><sub><i>s</i></sub>), coercivity (<i>H</i><sub><i>c</i></sub>), remanence (<i>M</i><sub><i>r</i></sub>), and anisotropy field (<i>H</i><sub><i>a</i></sub>). There is a reduction in coercivity from 5011 to 2688 Oe, with a decrease in <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({M}_{s}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>M</mi> <mi>s</mi> </msub> </math></EquationSource> </InlineEquation> from 151.84 to 87.72&#xa0;emu/g. From the absorption analysis, it was evident that the doping of Zr<sup>4+</sup> and Co<sup>2+</sup> has improved the absorption. A reflection loss (RL) of -41.70&#xa0;dB for an 8.3&#xa0;mm thickness and an input impedance (Z<sub>in</sub>) of 383.25 Ω was achieved for composition SrCoZr 5 with a -10&#xa0;dB absorption bandwidth of 504&#xa0;MHz. With high absorption and low thickness, the prepared hexaferrites may be a promising candidate for defence and industrial applications as a microwave absorber.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Structural, magnetic, and microwave absorption capabilities of Co2+ and Zr4+ doped Sr Ferrites for light-weight absorber applications

  • 期刊论文

  • 发表日期：

    2026年1月13日

查看全文
  • Sayed Tathir Abbas Naqvi,
  • Ankit Jain,
  • Shyamsundar,
  • Saddam Hussain,
  • Subodh Kumar Tripathi

摘要

Electromagnetic pollution is a big challenge in today’s wireless technological environment. Microwave absorbers are designed to mitigate this problem. These are the materials that absorb electromagnetic radiation and mitigate its harmful effects on humans and electronic devices. Magnatoplumbite (M-type) hexaferrites with the molecular formula SrCoyZryFe12-2yO19 were developed utilizing the sol–gel synthesis technique for microwave absorber applications. X-ray diffraction (XRD) was performed to investigate the structural purity of these synthesized hexaferrites. For the investigation on morphology, scanning electron microscopy (SEM) was done. An investigation on the magnetic characteristics was performed using different parameters like saturation magnetization (Ms), coercivity (Hc), remanence (Mr), and anisotropy field (Ha). There is a reduction in coercivity from 5011 to 2688 Oe, with a decrease in \({M}_{s}\) M s from 151.84 to 87.72 emu/g. From the absorption analysis, it was evident that the doping of Zr4+ and Co2+ has improved the absorption. A reflection loss (RL) of -41.70 dB for an 8.3 mm thickness and an input impedance (Zin) of 383.25 Ω was achieved for composition SrCoZr 5 with a -10 dB absorption bandwidth of 504 MHz. With high absorption and low thickness, the prepared hexaferrites may be a promising candidate for defence and industrial applications as a microwave absorber.