Effect of Mn and Zn doping on natural resonance frequency of strontium U-type hexaferrite and its performance as electromagnetic wave absorbers

Ismail I., Muhammad Zulkimi M. M., Azis R. S., Mustaffa M. S., Hamidon M. N., ERTUĞRUL M., ...Daha Fazla

JOURNAL OF ALLOYS AND COMPOUNDS, cilt.898, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 898
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.jallcom.2021.163246
  • Dergi Adı: JOURNAL OF ALLOYS AND COMPOUNDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Public Affairs Index, Civil Engineering Abstracts
  • Anahtar Kelimeler: Strontium hexaferrite, Complex permeability, Complex permittivity, Reflection loss (RL), COMPLEX PERMITTIVITY, PERMEABILITY, ABSORPTION, FERRITE, COBALT, GEL, CO
  • Atatürk Üniversitesi Adresli: Evet

Özet

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.