Abstract
Composite quartz ceramics (SiO2f/SiO2) are extensively utilized in radar radomes, but their high water and vapor absorption (WA & VA) rates have a severe impact on the radar’s dielectric properties. To address this issue, we first modified the ceramics with functional groups (-CH3 or -CF3) and then developed a series of coatings with exceptional water and moisture resistance by compounding fluorosubstituted silicone resin (RU) with organic montmorillonite (OMMT) or glass scale (GF). The results show that the coating, which being formed by a three-time coating using the dip-coating method, successfully seal the voids in SiO2f/SiO2 and preventing liquid water from seeping in. Also, the inorganic filler dispersing in the coating impedes the transmission of water vapor. The coated material exhibited a WA rate of 0.17%, VA rate of 0.13%, adhesion grade of 1, and surface hardness of HB. Therefore, the material meets the requirements for use as a radome.
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Funding
We gratefully acknowledge the financial support from the Natural Science Basic Research Plan of Shaanxi Province of China (Nos. 2020JM-087). We would like to thank the Analytical & Testing Center of Northwestern Polytechnical University as well.
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ZL: Conceptualization, Original writing, Review & editing, Investigation. QL: Methodology, Validation. SZ: Supervision, Investigation. Kai Yuan: Supervision, Formal analysis. JT: Supervision, Investigation. ZL: Investigation. JJ: Project administration, Funding acquisition.
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Li, Z., Liu, Q., Zhang, S. et al. Silicone composite coating for composite quartz ceramics with excellent water and moisture resistance. Journal of Materials Research 39, 283–296 (2024). https://doi.org/10.1557/s43578-023-01222-3
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DOI: https://doi.org/10.1557/s43578-023-01222-3