Effect of Mn and Zn doping on natural resonance frequency of strontium U-type hexaferrite and its performance as electromagnetic wave absorbers
Ismail, Ismayadi, Zulkimi, Muhammad Misbah Muhammad, Azis, Raba'ah Syahidah, Mustaffa, Muhammad Syazwan, Hamidon, Mohd Nizar, Ertugrul, Mehmet, Yesilbag, Yasar Ozkan, Tuzluca, Fatma Nur, Hasan, Intan Helina, Ozturk, Gokhan, Hasar, Ugur Cem
In the present work, substitution of strontium U-type hexaferrite with the composition of Sr4Mn2-xZnxFe36O60, (x = 0.5,0.6,0.8, and 1.0) was prepared via high energy ball milling (HEBM) and sintered at 1100 degrees C. The phase, microstructure, magnetic, dielectric and electromagnetic wave absorbing properties of U-type strontium hexaferrite composites were measured using XRD, FESEM, and Vector Network Analyzer in the frequency range of 8-18 GHz (X-band and Ku-band). MnZn doping was found to shift the natural resonance of the materials by affecting its magnetocrystalline anisotropy. The reflection loss (RL) indicated that the composite possessed good microwave-absorbing properties with U-type strontium hexaferrite (Sr4Mn2-xZnxFe36O60) of x = 0.8 resulted in high minimum RL value for all thickness of 1 mm and two peaks at approximately - 32.50 and - 41.50 dB at 14.00 and 15.60 GHz, with bandwidth of 0.60 and 0.80 GHz for losses less than - 10 dB. (C) 2021 Elsevier B.V. All rights reserved.
- Dergi
- JOURNAL OF ALLOYS AND COMPOUNDS
- Yıl
- 2022
- Cilt
- 898
- ISSN
- 0925-8388
- eISSN
- 1873-4669
- DOI
- 10.1016/j.jallcom.2021.163246
- WoS UID
- WOS:000749536700006