|Cite this article as:|
|Qiang Su, Hanqun Wang, Yunfei He, Dongdong Liu, Xiaoxiao Huang, and Bo Zhong, Preparation of CIP@TiO2 composite with broadband electromagnetic wave absorption properties, Int. J. Miner. Metall. Mater.,(2023). https://doi.org/10.1007/s12613-023-2707-5|
It is meaningful to improve the impedance matching of the material while maintaining its excellent wave absorption properties. In this paper, according to the hydrolysis characteristics of isopropyl titanate (TTIP), a simple preparation process of carbonyl iron powder (CIP) coated with TiO2 was designed. Due to the coated TiO2, the impedance matching of the CIP@TiO2 composite was well adjusted by decreasing the dielectric constant. Moreover, the interfacial polarization of CIP@TiO2 has also been enhanced. Ultimately, the electromagnetic wave (EMW) absorption property of CIP@TiO2 composite was significantly improved, the minimum reflection loss (RLmin) reach -46.07 dB, and the effective absorption bandwidth (EAB) can reach 8 GHz when the thickness is only 1.5 mm. Moreover, compared the CIP, the oxidation resistance of CIP@TiO2 was significantly improved. The results shown that the oxidation starting temperature of CIP@TiO2 is 400oC, whereas uncoated CIP has an oxidation starting temperature of about 250oC. Moreover, the largest oxidation rate temperature of CIP@TiO2 was increased to about 550oC. This work opens up a novel strategy for producing high-performance EMW absorbers with the help of structure design.