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

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

338842

Sigma-Aldrich

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

GF25290581

Titanium, tube, 1000mm, outside diameter 25.4mm, inside diameter 23.62mm, wall thickness 0.89mm, annealed, 99.6+%

GF10374678

Titanium, rod, 500mm, diameter 5mm, annealed, 99.6+%

GF55775975

Titanium, wire reel, 25m, diameter 0.25mm, as drawn, 99.6+%

GF56868766

Titanium, wire reel, 25m, diameter 1.0mm, annealed, 99.6+%

GF90688449

Titanium, wire reel, 5m, diameter 0.75mm, as drawn, 99.6+%

GF00558187

Titanium, wire reel, 25m, diameter 1.0mm, as drawn, 99.6+%

GF36425707

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

GF26694771

Titanium, wire reel, 20m, diameter 0.125mm, annealed, 99.6+%

GF61228403

Titanium, wire reel, 50m, diameter 0.75mm, as drawn, 99.6+%

GF91672139

Titanium, wire reel, 20m, diameter 0.05mm, hard, 99.8%

GF43519945

Titanium, wire reel, 2m, diameter 1.0mm, as drawn, 99.99+%

GF91204466

Titanium, wire reel, 5m, diameter 1.0mm, as drawn, 99.6+%

GF31127712

Titanium, rod, 10mm, diameter 50mm, 99.99+%

GF05925281

Titanium, microfoil, disks, 10mm, thinness 0.1μm, specific density 42.8μg/cm², permanent mylar 3.5μm support, 99.6+%

GF29391329

Titanium, tube, 1000mm, outside diameter 6.35mm, inside diameter 5.53mm, wall thickness 0.41mm, annealed, 99.6+%

GF72503827

Titanium, tube, 100mm, outside diameter 2.03mm, inside diameter 1.63mm, wall thickness 0.2mm, annealed, 99.6+%

GF64061760

Titanium, rod, 1000mm, diameter 16mm, annealed, 99.6+%

GF76772391

Titanium, rod, 100mm, diameter 10mm, annealed, 99.6+%

GF85496664

Titanium, tube, 1000mm, outside diameter 9.5mm, inside diameter 8.2mm, wall thickness 0.65mm, annealed, 99.6+%

GF90963928

Titanium, rod, 25mm, diameter 50mm, 99.99+%

GF42959661

Titanium, tube, 1000mm, outside diameter 10mm, inside diameter 8mm, wall thickness 1.0mm, annealed, 99.6+%

GF89377701

Titanium, tube, 100mm, outside diameter 25.4mm, inside diameter 23.62mm, wall thickness 0.89mm, annealed, 99.6+%

GF28411703

Titanium, tube, 100mm, outside diameter 10.3mm, inside diameter 8.7mm, wall thickness 0.8mm, annealed, 99.6+%

GF72212813

Titanium, tube, 200mm, outside diameter 25.4mm, inside diameter 23.62mm, wall thickness 0.89mm, annealed, 99.6+%

GF13900205

Titanium, tube, 100mm, outside diameter 0.51mm, inside diameter 0.35mm, wall thickness 0.08mm, annealed, 99.6+%

GF32270015

Titanium, tube, 200mm, outside diameter 2.03mm, inside diameter 1.55mm, wall thickness 0.24mm, annealed, 99.6+%

GF49264713

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