Aluminum and chromium substituted Z-type hexaferrites for antenna and microwave absorber applications

作者：Basandrai D; Bedi R K; Dhami A; Sharma J; Narang S B; Pubby K; Gupta A; Srivastava A K^*

来源：Journal of Sol-Gel Science and Technology, 2018, 85(1): 59-65.

DOI：10.1007/s10971-017-4532-7

• Z-type hexaferrite
• Vector network analyzer
• Vibrating sample magnetometer

Nanoparticles of Z-type hexaferrites, (x = 0.0, 0.5, 1.0), have been prepared using sol-gel auto combustion method. The XRD patterns for these compositions show the formation of Z-type hexaferrite. The bands near 415-480 and 550-590 cm(-1) in FTIR attribute to the bending and stretching of Fe-O bond vibration at octahedral and tetrahedral site of hexaferrite. VSM study shows the highest values of coercivity (911.11 Oe), retentivity (41.5 emu/g), and saturation magnetization (17.5 emu/g) for x = 1. Radiation absorbance investigation in the microwave X-band (8-12.5 GHz) region shows the maximum radiation loss of -31.19 dB (99.99% loss) at frequency 11.14 GHz for x = 0.5 and hence can be used commercially for microwave as well as antenna applications.
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• 出版日期2018-1