In-situ construction of Cr2O3@ATO hybrid pigment towards synergetic enhancement of visible light-infrared-radar compatible stealth

Xia Chai; Dongmei Zhu; Yin Liu; Yuchang Qing; Fa Luo; Zhibin Huang; Peng Li; Qiang Chen

doi:10.1016/j.jcis.2023.04.175

In-situ construction of Cr₂O₃@ATO hybrid pigment towards synergetic enhancement of visible light-infrared-radar compatible stealth

J Colloid Interface Sci. 2023 Sep:645:570-579. doi: 10.1016/j.jcis.2023.04.175. Epub 2023 May 6.

Authors

Xia Chai¹, Dongmei Zhu¹, Yin Liu¹, Yuchang Qing¹, Fa Luo¹, Zhibin Huang², Peng Li², Qiang Chen³

Affiliations

¹ State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China.
² Shaanxi Huaqin Technology Industry Co., Ltd., Xi'an 710119, China.
³ State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: chenqiang0213@126.com.

PMID: 37167907
DOI: 10.1016/j.jcis.2023.04.175

Abstract

Multiband compatible stealth engineering with controllable visible light-infrared (VIS-IR) features and radar wave absorption is urgently needed to improve the survivability of advanced military equipment. Cr₂O₃ has good visible light stealth performance under green background, but it is lack of IR and radar multi-band stealth properties. Herein, a core-shelled Cr₂O₃@stannic antimony oxide (ATO) structure was developed to enhance the IR-radar compatible stealth properties of Cr₂O₃ by in-situ precipitation method, concurrently maintaining its visible light stealth property. The morphology, conductivity, and infrared stealth properties of the Cr₂O₃@ATO hybrids were influenced by the calcination temperature, and the IR and radar stealth performance were tunable by ATO content. The lowest emissivity of Cr₂O₃@ATO pigments is 0.852, reduced by 10% than pure Cr₂O₃. The Cr₂O₃@ATO filled silicone resin coatings possessed good thermal stability and IR stealth stability. Benefiting from the enhanced interfacial polarization and conductive loss, the Cr₂O₃@ATO exhibited an effective absorption bandwidth of 2 GHz in the X band, with respect to pure Cr₂O₃ without radar absorption property. The Cr₂O₃@ATO structure opens an avenue for advanced VIS-IR-Radar compatible stealth materials.

Keywords: Compatible stealth coatings; Cr(2)O(3)@ATO hybrid pigments; Low emissivity; Microwave absorption; Pigment@semiconductor core-shelled structure.