TITLE:
Microstructure and Microwave Absorption Properties of Y-Substituted Ni-Zn Ferrites
AUTHORS:
Na Chen, Mingyuan Gu
KEYWORDS:
Nick-Zinc Ferrite; Sol-Gel Preparation; Magnetic Properties; Microwave Absorption
JOURNAL NAME:
Open Journal of Metal,
Vol.2 No.2,
June
26,
2012
ABSTRACT: The Yttrium ions substituted Ni-Zn ferrites powders were prepared using a sol-gel technique. The crystal structure, magnetic properties and microwave absorption properties of the Ni-Zn ferrites powders were studied by X-ray diffraction, vibrating sample magnetometer and vector network analyzer. The results show that the microwave absorption properties of the Ni-Zn ferrites can be improved effectively with the substitution of Y ions. The minimum reflection loss of the Yttrium ions substituted Ni-Zn powder reaches –34.8 dB, with the –20 dB bandwidth over 2 GHz. The Yttrium substitution can improve microwave absorption properties of Ni-Zn ferrite due to smaller grain dimension and the higher specific magnetization