Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 183, Issue 12, Pages 2797-2804Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2010.09.028
Keywords
Mesoporous nanocomposite; Solvent-evaporation induced self-assembly; Microwave absorption; Infrared emissivity
Funding
- National Natural Science Foundation of China [50871053]
- Aeronautical Science Foundation of China [2007ZF52061]
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Ordered mesoporous C-TiO2 nanocomposites with crystalline framework were prepared by the evaporation-induced triconstituent co-assembly method. The products were characterized by XRD, TEM, N-2 adsorption-desorption and TG. Their microwave absorption properties were investigated by mixing the product and epoxy resin. It is found that the peak with minimum reflection loss value moves to lower frequencies and the ordered mesoporous C-TiO2 nanocomposite possesses an excellent microwave absorbing property with the maximum reflection loss of -25.4 dB and the bandwidth lower than -10 dB is 6.6 GHz. The attenuation of microwave can be attributed to dielectric loss and their absorption mechanism is discussed in detail. The mesoporous C-TiO2 nanocomposites also exhibit a lower infrared emissivity in the wavelength from 8 to 14 mu m than that of TiO2-free powder. (C) 2010 Elsevier Inc. All rights reserved.
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