Sr hexaferrite/Ni ferrite nanocomposites: Magnetic behavior and microwave absorbing properties in the X-band

Increasing microwave absorption efficiency in ferrite based materials by doping with lead and forming composites

“…The absorbing property is usually characterized by reflection loss [25,26] which is just the s 11 parameter measured by a network analyzer. The definition of s 11 [27] can be simply put as the ratio of reflected voltage V r and the incident voltage V i of the microwave signal at two ports of the analyzer.…”

Quantifying structural and electromagnetic interference (EMI) shielding properties of thermoplastic polyurethane–carbon nanofiber/magnetite nanocomposites

“…The mixture was cooled to room temperature and filtered. The filtrate was washed several times with excess of deionized water until no residual acid was present (pH [6). The filtrate, oxidized CNF, was then dried in a vacuum oven at 70°C for 6 h.…”

“…It is simply known that the conducting materials such as metal particles, sheets, and various forms of carbons and conductive polymers can be used to reflect the electromagnetic waves while different types of magnetic materials could be employed to absorb the electromagnetic waves. Soft and hard ferrites are the most extensively studied magnetic materials for the electromagnetic interference (EMI) shielding, specifically microwave or radar absorbing, applications [1][2][3][4][5][6][7][8]. The unique structural and physical features of single or mixed-structure ferrites make them proper materials for absorbing of electromagnetic waves in the relatively high-frequency region (8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) which is an important range for radar absorbing and military applications.…”

Characterization of magnetic and microwave absorption properties of multi-walled carbon nanotubes/Mn-Cu-Zr substituted strontium hexaferrite nanocomposites

“…The excellent properties of strontium hexaferrite with the chemical composition of SrFe 12 O 19 (SrM) such as high Curie temperature, low cost and high chemical stability lead many researchers to consider it as an electromagnetic absorbing material [4,5].…”