Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 13, Issue 4, Pages 3115-3120Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2013.7371
Keywords
Nanocomposite; Sol-Gel Process; Hollow Microfiber; Ferrite; Exchange-Coupling Interaction
Categories
Funding
- National Natural Science Foundation of China [51274106, 51202091]
- Science and Technology Support Program of Jiangsu Province [BE2012143]
- Natural Science Research Program of Jiangsu Province Higher Education [12KJA430001]
- Doctoral Program of Higher Education of China [20103227110006]
- Jiangsu Province's Postgraduate Cultivation and Innovation Project [CX10B-257Z]
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The binary Ba0.5Sr0.5Fe12O19 (BSFO)/Ni0.5Zn0.5Fe2O4 (NZFO) nanocomposite ferrites hollow microfibers with high aspect ratios have been prepared by the gel precursor transformation process. These microfibers possess a high specific surface area about 45.2 m(2) g(-1), and a ratio of the hollow diameter to the fiber diameter estimated about 5/7. The binary nanocomposite ferrites are formed after the precursor calcined at 750 C for 3 h. Their minimum reflection loss (RL) is -38.1 dB at 10.4 GHz. The microwave absorption bandwidth with RL value exceeding -20 dB covers the whole X-band (8.2-12.4 GHz) and Ku-band (12.4-18 GHz). This enhancement in microwave absorption can be attributed to the exchange-coupling interaction, interfacial polarization and small size effect in nanocomposite hollow microfibers.
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