Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 4, Issue 4, Pages 2101-2106Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am300069x
Keywords
BaTiO3 nanotubes; crystal structure; morphology; microwave absorption
Funding
- Global COE Program
- CLUSTER, Ministry of Education, Culture, Sports, Science and Technology, Japan
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Uniform BaTiO3 nanotubes were synthesized via a simple wet chemical route at low temperature (50 degrees C). The assynthesized BaTiO3 nanotubes were characterized using powder X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The results show that the BaTiO3 nanotubes formed a cubic phase with an average diameter of similar to 10 nm and wall thickness of 3 nm at room temperature. The composition of the mixed solvent (ethanol and deionized water) was a key factor in the formation of these nanotubes; we discuss possible synthetic mechanisms. The microwave absorption properties of the BaTiO3 nanotubes were studied at microwave frequencies between 0.5 and 15 GHz. The minimum reflection loss of the BaTiO3 nanotubes/paraffin wax composite (BaTiO3 nanotubes weight fraction = 70%) reached 21.8 dB (similar to 99.99% absorption) at 15 GHz, and the frequency bandwidth less than -10 dB is from 13.3 to 15 GHz. The excellent absorption property of BaTiO3 nanotubes at high frequency indicates that these nanotubes could be promising microwave-absorbing materials.
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