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

338842

Sigma-Aldrich

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

208108

Sigma-Aldrich

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

467634

Sigma-Aldrich

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

GF52005596

Titanium, tube, 500mm, outside diameter 9.5mm, inside diameter 8.2mm, wall thickness 0.65mm, annealed, 99.6+%

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GF58567067

Titanium, rod, 100mm, diameter 5mm, annealed, 99.6+%

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

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Titanium, rod, 100mm, diameter 9.5mm, annealed, 99.99+%

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Titanium, rod, 200mm, diameter 8.0mm, as drawn, 99.99+%

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Titanium, wire reel, 10m, diameter 1.5mm, as drawn, 99.6+%

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Titanium, wire reel, 25m, diameter 0.20mm, annealed, 99.6+%

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Titanium, wire reel, 0.5m, diameter 1.0mm, annealed, 99.6+%

266035

Sigma-Aldrich

Titanium, wire, diam. 1.0 mm, 99.99% trace metals basis