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Optimization of Zn<sub><i>x</i></sub>Fe<sub>3–<i>x</i></sub>O<sub>4</sub> Hollow Spheres for Enhanced Microwave Attenuation
No full textWe report here the composition optimization
of Zn<sub><i>x</i></sub>Fe<sub>3–<i>x</i></sub>O<sub>4</sub> hollow nanospheres for enhancing microwave attenuation.
Zn<sub><i>x</i></sub>Fe<sub>3–<i>x</i></sub>O<sub>4</sub> hollow nanospheres were synthesized through a simple
solvothermal process. The maximum magnetization moment of 91.9 emu/g
can be obtained at <i>x</i> = 0.6. The composite filled
with Zn<sub>0.6</sub>Fe<sub>2.4</sub>O<sub>4</sub> exhibited the bandwidth
of 3.21–8.33 GHz for RL < −10 dB and a maximum relative
bandwidth (<i>W</i><sub>p,max</sub>) of 88.6% at optimized
thickness <i>t</i><sub>0</sub> = 0.34 cm. The enhancement
should be attributed to the enhanced permeability resonance at high
frequency. This optimized hollow material is very promising to be
used as a mass efficient and broadband microwave attenuation material
