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Development of SrFe12O19/Ti3SiC2 Composites for Enhanced Microwave Absorption

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Abstract

Microwave absorbing composites containing strontium hexaferrite and titanium silicon carbide, SrFe12O19/Ti3SiC2 powder, were synthesized by mixing in different weight ratios. The strontium hexaferrite (SrFe12O19) particles were synthesized using low-temperature combustion. The ‘as synthesized’ strontium hexaferrite powder is observed to have low coercivity (255.09 G) and high saturation magnetization (45.1 emu/g). The titanium silicon carbide (Ti3SiC2) powder was synthesized by heat treatment of the precursors (Ti/Si/TiC) at 1100°C under argon atmosphere. A microwave absorbing composite is fabricated by mixing in a high-energy ball mill followed by heating of SrFe12O19 and Ti3SiC2 powders at 200°C. The maximum reflection loss of − 39.67 dB is observed at 9.46 GHz for the composite casted into pellets containing 20% Ti3SiC2 and 80% SrFe12O19 with 2-mm thickness. The bandwidth for less than − 10 dB loss is observed to be 2.77 GHz (66% of the total band). The developed magneto-dielectric composition confirmed its candidacy as a potential microwave absorbing material.

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Acknowledgments

The authors would like to acknowledge the director, Directorate of Extramural Research & Intellectual Property Rights, DRDO, New Delhi, for the financial support for carrying out this research work. The authors are thankful to the Director, CSIR-CSIO for the support and the encouragement provided. The authors are also thankful to UGC, New Delhi for providing the fellowship to the first author of this study.

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Correspondence to Sachin Tyagi.

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Garg, A., Goel, S., Kumari, N. et al. Development of SrFe12O19/Ti3SiC2 Composites for Enhanced Microwave Absorption. Journal of Elec Materi 49, 2233–2241 (2020). https://doi.org/10.1007/s11664-019-07922-z

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Keywords

  • Composite materials
  • sol–gel processes
  • magnetization
  • magnetic measurements