Hydrothermal synthesis of tetragonal BaTiO3 nanotube arrays with high dielectric performance.

Hydrothermal synthesis of tetragonal BaTiO3 nanotube arrays with high dielectric performance.

Journal of nanoscience and nanotechnology (2014-04-18)

Liming Wang, Xiangyun Deng, Jianbao Li, Xinxing Liao, Guoqing Zhang, Chunpeng Wang, Kuifan Su

ABSTRACT

Tetragonal Barium titanate (BaTiO3) nanotube arrays have been prepared using the template-assisted hydrothermal method combined with an annealing process. The in-situ chemical conversion of TiO2 nanotube array templates ensured that BaTiO3 maintained the morphology of the nanotube architectures. Moreover, X-ray diffraction and Raman spectrum characterization were used to confirm that the BaTiO3 nanotube arrays had a tetragonal phase after the use of a simple annealing technique. Typical hysteresis loops showed their ferroelectricity, with the remanent polarization and coercive fields being 2.57 microC/cm2 and 2.52 kV/cm, respectively. The relative dielectric constant of the tetragonal BaTiO3 nanotube arrays reached up to 1000 and the dielectric loss was as low as 0.02 at 1 kHz at room temperature.

MATERIALS

Product Number

Brand

Product Description

IRMM531C

Titanium, IRMM^®, certified reference material, 0.5 mm wire

467634

Sigma-Aldrich

Barium titanate(IV), nanopowder (cubic crystalline phase), <100 nm particle size (BET), ≥99% trace metals basis

267902

Sigma-Aldrich

Titanium, wire, diam. 0.81 mm, 99.7% trace metals basis

338842

Sigma-Aldrich

Barium titanate(IV), powder, <2 μm, 99.5% trace metals basis

348848

Sigma-Aldrich

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208108

Sigma-Aldrich

Barium titanate(IV), powder, <3 μm, 99%

266035

Sigma-Aldrich

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Titanium, rod, 1000mm, diameter 3.0mm, annealed, 99.6+%

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