Preparation of CIP@TiO2 composite with broadband electromagnetic wave absorption properties
Source abstract
Abstract
Scholars aim for the improved impedance matching (Z) of materials while maintaining their excellent wave absorption properties. Based on the hydrolysis characteristics of isopropyl titanate, a simple preparation process for the coating of carbonyl iron powder (CIP) with TiO2 was designed. Given the TiO2 coating, the Z of the CIP@TiO2 composite was adjusted well by decreasing the dielectric constant. Moreover, the interfacial polarization of CIP@TiO2 was enhanced. Ultimately, the electromagnetic-wave (EMW) absorption property of the CIP@TiO2 composite was improved substantially, the minimum reflection loss reached −46.07 dB, and the effective absorption bandwidth can reach 8 GHz at the composite thickness of 1.5 mm. Moreover, compared with CIP, the oxidation resistance of CIP@TiO2 showed remarkable improvement. The results revealed that the oxidation starting temperature of CIP@TiO2 was about 400°C, whereas the uncoated CIP had an oxidation starting temperature of approximately 250°C. Moreover, the largest oxidation rate temperature of CIP@TiO2 increased to around 550°C. This work opens up a novel strategy for the production of high-performance EMW absorbers via structural design.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies · Flame retardant materials and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (48)
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