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- Title
Surface morphology modulation and wave-absorbing properties of C@TiO<sub>2</sub> composite microspheres.
- Authors
Zhang, Ziyi; Yin, Xiaoqing; Zhang, Fan; Chen, Yang
- Abstract
In this paper, we synthesized phenolic resin microspheres through the condensation reaction of resorcinol and formaldehyde. Subsequently, lychee-like C@TiO2 microspheres were prepared using a process of hydrolytic coating and high-temperature calcination. Under alkaline hydrolysis conditions, the hydroxyl group of phenolic resin can exist stably and react readily with tetrabutyl titanate to form complexes, and then tetrabutyl titanate can be dispersed uniformly. We evaluated the microwave absorption performance of C@TiO2 composites generated by calcination at different temperatures. The result showed that morphology control can be achieved through temperature regulation, and effective electromagnetic wave absorption in the X, C, and Ku bands can be achieved by adjusting the thickness. The lowest reflection loss (RLmin) is − 34.3dB to − 38.46dB, and the effective absorption bandwidth (EAB) is 2.33 to 4.29 GHz. As a typical semiconductor, TiO2 can effectively adjust the overall dielectric properties of carbon material, which optimizes impedance matching and generates new heterogeneous interfaces, thus improving the wave absorption performance of the composites. In addition, this method has the advantages of easy preparation, low cost, controllable structure, uniform dispersion of coating particles, and environmental friendliness. This makes it a potential microwave absorbing material.
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 5, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-024-12115-4