Scholarlink

<p>The solid solution formed by the combination of multiple cations has been extensively investigated due to its distinctive lattice distortion effect, which imparts unique electromagnetic properties. In particular, the regulation of dielectric and magnetic properties can be achieved through element selection. Herein, the stability of Ta<sub><i>x</i></sub>Nb<sub>1-<i>x</i></sub>C was predicted through geometric optimization of crystal structure, and Ta<sub><i>x</i></sub>Nb<sub>1-<i>x</i></sub>C nanowires were successfully synthesized through F-ion-assisted carbothermal reduction method. The introduction of bimetallic ions forms significant carbon defects and lattice distortion, which undoubtedly induces the formation of strong interface polarization and defect polarization, resulting in high dielectric loss. Furthermore, the significant presence of imperfections leads to a decrease in both the dielectric constant and conductivity, thereby achieving impedance balance. The design of a one-dimensional structure also facilitates the formation of conductive pathways, promoting carrier transitions. Benefiting from a variety of loss mechanisms and appropriate impedance matching, solid solution Ta<sub><i>x</i></sub>Nb<sub>1-<i>x</i></sub>C shows excellent electromagnetic wave absorption (EWA) performance. This research presents a promising strategy for developing single-phase materials with excellent EWA performance.</p> Graphical abstract <p></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

Defect engineering boosts microwave absorption in TaxNb1-xC nanowires

  • 期刊论文

  • 发表日期：

    2025年1月21日

查看全文
  • Lan-Chao Wen,
  • Li Guan,
  • Jia-Xin Zhang,
  • Yu-Jie Zhu,
  • Peng Chen,
  • Jia-Lu Suo,
  • Biao Zhao,
  • Rui Zhang

摘要

The solid solution formed by the combination of multiple cations has been extensively investigated due to its distinctive lattice distortion effect, which imparts unique electromagnetic properties. In particular, the regulation of dielectric and magnetic properties can be achieved through element selection. Herein, the stability of TaxNb1-xC was predicted through geometric optimization of crystal structure, and TaxNb1-xC nanowires were successfully synthesized through F-ion-assisted carbothermal reduction method. The introduction of bimetallic ions forms significant carbon defects and lattice distortion, which undoubtedly induces the formation of strong interface polarization and defect polarization, resulting in high dielectric loss. Furthermore, the significant presence of imperfections leads to a decrease in both the dielectric constant and conductivity, thereby achieving impedance balance. The design of a one-dimensional structure also facilitates the formation of conductive pathways, promoting carrier transitions. Benefiting from a variety of loss mechanisms and appropriate impedance matching, solid solution TaxNb1-xC shows excellent electromagnetic wave absorption (EWA) performance. This research presents a promising strategy for developing single-phase materials with excellent EWA performance.

Graphical abstract