The influence of basic composition and microstructures on the properties of Ni–Zn ferrite radio-absorbing materials

• Increasing Fe2O3 up to 51.0 mol% leads to increasing permeability of a ferrite.
• It also leads to a shift in frequency interval in the direction of low frequencies.
• It is more effective to introduce Fe2O3 at the second stage of the crushing.

This work deals with the research into the electromagnetic properties of Ni–Zn ferrite radio-absorbing materials obtained by the ceramic method under different technological conditions. There has been ascertained the influence of basic composition and microstructures on the level of absorption of electromagnetic radiation by Ni–Zn ferrite radio-absorbing materials. The results indicate that increasing the surplus Fe2O3 up to 51.0 mol% leads to a shift in frequency interval in the direction of low frequencies. It can be explained by increase of the permeability and permittivity of a ferrite.