Boosted multi-polarization from silicate-glass@rGO doped with modifier cations for superior microwave absorption

Yuming Feng; Long Xia; Chuheng Ding; Hua Yang; Guirong Xu; Tao Zhang; Li Xiong; Chulin Qin; Guangwu Wen

doi:10.1016/j.jcis.2021.03.007

Boosted multi-polarization from silicate-glass@rGO doped with modifier cations for superior microwave absorption

J Colloid Interface Sci. 2021 Jul:593:96-104. doi: 10.1016/j.jcis.2021.03.007. Epub 2021 Mar 10.

Authors

Yuming Feng¹, Long Xia², Chuheng Ding¹, Hua Yang³, Guirong Xu⁴, Tao Zhang¹, Li Xiong¹, Chulin Qin¹, Guangwu Wen⁵

Affiliations

¹ School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China.
² School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China. Electronic address: xialonghit@gmail.com.
³ School of Science, Lanzhou University of Technology, Lanzhou 730050, China.
⁴ Avic Harbin Aircraft Industry Group Co.,LTD, Harbin 150066, China.
⁵ School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, China.

PMID: 33744556
DOI: 10.1016/j.jcis.2021.03.007

Abstract

Multi-polarization structural design was proved to be a resultful strategy to achieve superior microwave absorbers but limited by the low dielectric properties. In this work, silicate-glasses (SG) nanoparticles doped with different modifier cations (M) have been synthesized by the sol-gel method. Modified silicate-glasses (M-SG) nanoparticles were loaded on reduce graphene oxide (rGO) nanosheets through hydrothermal possess and high-temperature calcination with adding a silane coupling agent (KH-550). The dielectric loss and impedance matching were improved through the synergistic effect of rGO and M-SG. The microwave absorption (MA) performance of M-SG@rGO has been highly boosted, and the minimum reflection loss (RL) is -69.2 dB with a thickness of 2.8 mm. Meanwhile, the X-band and Ku-band absorption can also be obtained with specific M-SG loading at a particular thickness. The results demonstrate that the effects of dipole polarization and interface polarization all play a vital role in improving the microwave absorption performance of M-SG@rGO absorbers.

Keywords: Graphene; Impedance matching; Microwave absorption; Polarization; Silicate-glass.