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

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Titanium, rod, 200mm, diameter 25mm, annealed, 99.6+%

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Titanium, rod, 50mm, diameter 20mm, as drawn, 99.99+%

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Titanium, tube, 200mm, outside diameter 1.6mm, inside diameter 1.2mm, wall thickness 0.2mm, hard, 99.6+%

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Titanium, tube, 1000mm, outside diameter 1.05mm, inside diameter 0.75mm, wall thickness 0.15mm, annealed, 99.6+%

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Titanium, tube, 1220mm, outside diameter 2.03mm, inside diameter 1.55mm, wall thickness 0.24mm, annealed, 99.6+%

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Titanium, wire reel, 200m, diameter 0.20mm, annealed, 99.6+%