Scholarlink

<p>The unique structure of porous ceramics can effectively absorb and scatter electromagnetic waves, especially in the microwave frequency band. In this study, porous Na<sub>3</sub>Zr<sub>2</sub>Si<sub>2</sub>PO<sub>12</sub> (NZSP) ceramics were synthesized using an efficient, easy and scalable solid-state method. The properties of the porous NZSP were evaluated by XRD, SEM, and a vector network analyzer. The structures prepared by 25% pore-forming agents had small, uniformly distributed pore structures. The <i>ε′</i>, <i>ε″</i>, and tan<i>δ</i><sub><i>E</i></sub> increased with increasing pore-forming agent content for NZSP-25. The NZSP-25 showed more than two semicircles in the Cole-Cole semicircle, which was beneficial for improving electromagnetic wave absorption performance. With 25 wt.% content of the pore-forming agent and a forming pressure of 40 MPa, the minimum reflection loss (RL<sub>min</sub>) of the porous NZSP ceramic with a thickness of only 2 mm reached − 32.6 dB at 10.3 GHz. Furthermore, this ceramic displayed a broader bandwidth (RL &lt; − 5 dB) of 4.2 GHz, meeting the requirements of being light, thin, wide, and strong at the same time. The results provide valuable insights into the development of high-temperature materials suitable for stealth applications.</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

Preparation, Dielectric and Microwave Absorption Properties of Ultra-Thin and Porous Na3Zr2Si2PO12 Ceramics

  • 期刊论文

  • 发表日期：

    2025年9月19日

查看全文
  • Hui Gao,
  • Hongyu Chen,
  • Weiwei Bai,
  • Jie Dong,
  • Guangqun Cao,
  • Kai Yuan,
  • Rui Zhou,
  • Yongping Qu

摘要

The unique structure of porous ceramics can effectively absorb and scatter electromagnetic waves, especially in the microwave frequency band. In this study, porous Na3Zr2Si2PO12 (NZSP) ceramics were synthesized using an efficient, easy and scalable solid-state method. The properties of the porous NZSP were evaluated by XRD, SEM, and a vector network analyzer. The structures prepared by 25% pore-forming agents had small, uniformly distributed pore structures. The ε′, ε″, and tanδE increased with increasing pore-forming agent content for NZSP-25. The NZSP-25 showed more than two semicircles in the Cole-Cole semicircle, which was beneficial for improving electromagnetic wave absorption performance. With 25 wt.% content of the pore-forming agent and a forming pressure of 40 MPa, the minimum reflection loss (RLmin) of the porous NZSP ceramic with a thickness of only 2 mm reached − 32.6 dB at 10.3 GHz. Furthermore, this ceramic displayed a broader bandwidth (RL < − 5 dB) of 4.2 GHz, meeting the requirements of being light, thin, wide, and strong at the same time. The results provide valuable insights into the development of high-temperature materials suitable for stealth applications.