Enhanced electromagnetic interference shielding effectiveness of h-BN decorated micro cube-like CaTiO3/Cu nanocomposite

Heterostructured Ni3B/Ni nanosheets for excellent microwave absorption and supercapacitive application

The development of electronic information technology has placed higher demands on microwave absorption materials (MAMs), especially the exploration of novel MAMs to broaden their application. At present, little attention has been given the wave absorption properties of transition metal borides (TMBs). In this work, a simple and economical method is developed to prepare Ni₃B/Ni heterostructure nanosheets and their possible applications for microwave absorption (MA) and supercapacitor are evaluated. It is worth noting that Ni₃B/Ni nanosheets exhibit excellent MA properties due to the aggregated nanosheet-like morphology of Ni₃B/Ni with enhancing interfacial polarization, as well as the synergistic effect of dielectric and magnetic losses. It is observed in experiments that the minimum reflection loss value of Ni₃B/Ni is -41.60 dB at 16.8 GHz. Moreover, the maximum effective absorption bandwidth can reach 3.28 GHz. Furthermore, Ni₃B/Ni has good energy storage characteristics and is able to provide a specific capacity of 1150.6F g^-1 at a current density of 1 A g^-1. Meanwhile, it has the ability to maintain an initial capacity of 74.4 % after 1000 cycles at a current density of 10 A g^-1. Therefore, this study provides an idea to explore TMBs as high-performance MA and supercapacitor materials.

Shielding effectiveness of multilayer laminate of aluminum metal matrix and micro absorbing materials

Shielding blocks are widely used to protect sensitive electronic components in defense and medical equipment. In many circumstances, acquiring shielding effectiveness is insufficient, with shielding effectiveness having higher priority if the material possesses mechanical characteristics. To achieve the required electromagnetic shielding effectiveness and mechanical properties such as tensile strength and hardness, a laminate sheet with Al6061 material and micro absorbing materials such as MNZC ferrite rubber composite, Ca-NiTi hexaferrite composites, and Carbonyl iron is preferred in the current work. The total work organized as•Selection of the aluminum metal matrix and micro absorbing material.•Finding the electrical parameters using the vector network analyzer (VNA) using Transmission/Reflection method.•The shielding performance was evaluated for different laminate thicknesses at the X-band.•The material mentioned above can be used as a shielding building block in aeronautical applications and near sensitive medical equipment.