Structure and Microwave Absorption Properties of Polyaniline/Zn Ferrite Composites

Abstract

Polyaniline (PANI)/Zn ferrite composites were fabricated by simple two-step method. The crystal phase, particle size, morphology, thermal stability and conductivity were characterized. Electromagnetic parameters of PANI/Zn ferrite composites were measured at room temperature in the frequency of 2–18[Formula: see text]GHz. The prepared composite had an amorphous fluffy structure, Zn ferrite nanoparticles with diameters ranging from 20[Formula: see text]nm to 30[Formula: see text]nm are encapsulated in PANI or on PANI surface, and the thermal stability of the composite is poor. But Zn ferrite content plays a key role in influencing this structure and regulating microwave attenuation capability. The PANI/Zn ferrite composites showed an enhanced microwave absorption performance in Ku band at thin coating thickness which corresponds to RL value below [Formula: see text][Formula: see text]dB and the minimum reflection loss (RL) is [Formula: see text][Formula: see text]dB at 17.6[Formula: see text]GHz with the coating thickness of 1.4[Formula: see text]mm.

Silica-Modified Ordered Mesoporous Carbon for Optimized Impedance-Matching Characteristic Enabling Lightweight and Effective Microwave Absorbers

“…With the swift expansion of electronic equipment and radio communications, it brings not only high efficiency and convenience to industrial production but also electromagnetic interference. Consequently, research studies on high-efficiency microwave absorption (MA) materials have attracted great attention. , It is generally accepted that the ideal MA material ought to possess the following characteristics: thin thickness, light weight, strong absorption, and wide band. − Until now, many MA materials, including conductive polymers, , ceramics, , ferrites, , and so forth, have been studied and applied in real life. Among these candidates, carbon-based materials are thought of as the most promising materials for MA because of their salient features (relatively light weight, good corrosion resistance, and rich active sites). , …”

“…1,2 It is generally accepted that the ideal MA material ought to possess the following characteristics: thin thickness, light weight, strong absorption, and wide band. 3−6 Until now, many MA materials, including conductive polymers, 7,8 ceramics, 9,10 ferrites, 11,12 and so forth, have been studied and applied in real life. Among these candidates, carbon-based materials are thought of as the most promising materials for MA because of their salient features (relatively light weight, good corrosion resistance, and rich active sites).…”

Dynamic Response of Polyindole Coated Zinc Ferrite Particle Suspension under an Electric Field

“…In addition, indole monomer present around the ZnFe 2 O 4 particles forms PIn shell by nucleating and growing on the surface of magnetic particles through an oxidative polymerization process. Through this mechanism, ZnFe 2 O 4 /PIn particles with a core-shell structure are formed [ 24 , 25 ].…”

Recent advancements in the electromagnetic interference shielding performance of nanostructured materials and their nanocomposites: a review

“…Studies were conducted on several nanomaterials, such as ferromagnetic element nanoalloys, metal oxides, ferrites and their polymers and ICP-based nanocomposites in EMI shielding applications. 276–405 The choice of magnetic materials-filled ICP nanocomposites in EMI shielding applications is mainly guided by the dielectric loss, magnetic loss and impedance matching of the component(s) of the material(s) under investigation. It provides a combination of magnetic nanoparticles and ICPs that account for its additionally reduced weight, cost, enhanced flexibility and corrosion resistance, tuneability conductivity and tailorable permeability.…”