Enhancement of microwave absorption bandwidth of polymer blend using ferromagnetic gadolinium silicide nanoparticles
Enhancement of microwave absorption bandwidth of polymer blend using ferromagnetic gadolinium silicide nanoparticles
复制标题
DOI：
10.1016/j.matlet.2019.04.013
复制
发表时间：
2019-10
影响因子：
3
通讯作者：
Pritom J. Bora;Shalabh Gupta;V. Pecharsky;K. Vinoy;Praveen C Ramamurthy;R. Hadimani
中科院分区：
文献类型：
--
作者：
Pritom J. Bora;Shalabh Gupta;V. Pecharsky;K. Vinoy;Praveen C Ramamurthy;R. Hadimani
摘要铁磁硅化钆（Gd 5Si 4）纳米粒子显著提高了聚合物共混物（PVB-PEDOT：PSS）的微波吸收带宽。这些材料对于各种军事和民用应用，如X波段（8.2-12.4 GHz）和Ku波段（12.4-18 GHz）吸收是迫切需要的。单层1.2 mm厚的PVB-PEDOT：PSS-Gd 5 Si 4（PPGS）纳米复合薄膜显示出最有前途的带宽（8.2-18 GHz），最小反射损耗为− 14 dB。从机理上讲，介电损耗（tan δ e = 2.4）和磁损耗（tan δ m = 1.1）的贡献更有效，标准微波模拟证实了PPGS纳米复合材料中储存的能量是主要的，这提高了带宽。
Abstract Ferromagnetic gadolinium silicide (Gd 5 Si 4) nanoparticles significantly enhance the microwave absorption bandwidth of a polymer blend (PVB-PEDOT: PSS). These materials are critically needed for various military and civilian applications such as X-band (8.2–12.4 GHz) and Ku-band (12.4–18 GHz) absorption. A single 1.2 mm thick layer of PVB-PEDOT: PSS-Gd 5 Si 4 (PPGS) nanocomposite film shows the most promising bandwidth (8.2–18 GHz) with a minimum reflection loss of− 14 dB. Mechanistically, dielectric loss (tan δ e≈ 2.4) and magnetic loss (tan δ m≈ 1.1) contributes more efficiently, and standard microwave simulation confirms the stored energy is predominant in PPGS nanocomposite which enhances the bandwidth.