Synthesis and investigation of physical properties of CNT/Ni_0.5Zn_0.5Fe₂O₄ nanocomposites with low density

Abstract

Ni-Zn ferrites have important applications in the field of soft magnetic materials due to their excellent magnetic properties, but their high bulk density hinders their widespread use. CNT/nickel-zinc ferrite (CNT/Ni_0.5Zn_0.5Fe₂O₄) nanocomposites was prepared by sol-gel method, and sintered at 1000 °C to be used as an electromagnetic wave absorber. The results showed that the morphology, impedance matching, density, electrical conductivity and absorption coefficient of CNT/Ni-Zn ferrite was controlled by the additional CNT content. The NZ3 sample containing 0.06 g of CNT showed high conductivity, and high absorption coefficient. The amount of 0.06 g of CNT was a critical amount for the CNT/Ni-Zn ferrite nanocomposites. Above this value, the increasing trend toward improved nanocomposite properties due to the agglomeration of CNTs was reversed. The absorption performance of the CNT/Ni-Zn ferrite nanocomposites are attributed to the incorporation of dielectric and magnetic loss mechanisms in which the magnetic portion is comparable to the dielectric portion. Possessing excellent magnetic and absorption properties, it has the potential to be an excellent electromagnetic wave absorbing material.

Keywords:

• CNT/Ni_0.5Zn_0.5Fe₂O₄
• sol-gel method
• magnetic property
• electrical property
• density measurement

Acknowledgement

The author would like to thank education office of district 1 of Kermanshah for their assistance with my research, which led to the publication of this article.

Disclosure statement

No potential conflict of interest was reported by the authors.

Table 1. The 2θ angle, d-space, Miller indices and grain size of NZ0, NZ1, NZ2, NZ3, and NZ4 samples.

Additional information

Funding

No related funding.