title: Facile synthesis of BaTiO3 nanotubes and their microwave absorption properties.
abstract: Uniform BaTiO(3) nanotubes were synthesized via a simple wet chemical route at low temperature (50 °C). The as-synthesized BaTiO(3) 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 BaTiO(3) nanotubes formed a cubic phase with an average diameter of ~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 BaTiO(3) nanotubes were studied at microwave frequencies between 0.5 and 15 GHz. The minimum reflection loss of the BaTiO(3) nanotubes/paraffin wax composite (BaTiO(3) nanotubes weight fraction = 70%) reached 21.8 dB (~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 BaTiO(3) nanotubes at high frequency indicates that these nanotubes could be promising microwave-absorbing materials.
authors.affiliation: Interdisciplinary Graduate School of Science and Technology, Shinshu University, Tokida, Ueda, Japan.
authors.forename: Yao-Feng
authors.initials: YF
authors.lastname: Zhu
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Natsuki
authors.forename: Ya-Qin
authors.initials: YQ
authors.lastname: Fu
authors.forename: Qing-Qing
authors.initials: QQ
authors.lastname: Ni