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

IRMM531B

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

208108

Sigma-Aldrich

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

369489

Sigma-Aldrich

Titanium, foil, thickness 2.0 mm, 99.7% trace metals basis

305812

Sigma-Aldrich

Titanium, 5-10 mm, ≥99.99% trace metals basis (purity exclusive of Na and K content)

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

460400

Sigma-Aldrich

Titanium, wire, diam. 0.25 mm, 99.7% trace metals basis

266035

Sigma-Aldrich

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

348791

Sigma-Aldrich

Titanium, foil, thickness 0.127 mm, 99.7% trace metals basis

348848

Sigma-Aldrich

Titanium, foil, thickness 0.025 mm, 99.98% trace metals basis

GF91859967

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

GF13959939

Titanium, microfoil, disks, 10mm, thinness 0.5μm, specific density 225.4μg/cm², permanent mylar 3.5μm support, 99.6+%

GF87716997

Titanium, rod, 100mm, diameter 16mm, as drawn, 99.99+%

GF06082286

Titanium, microfoil, disks, 10mm, thinness 1.0μm, specific density 429μg/cm², permanent mylar 3.5μm support, 99.6+%

GF58567067

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

GF62676759

Titanium, rod, 200mm, diameter 2mm, as drawn, 99.99+%

GF26694771

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

GF06813525

Titanium, wire reel, 1m, diameter 0.5mm, as drawn, 99.6+%

GF29584187

Titanium, tube, 500mm, outside diameter 2.03mm, inside diameter 1.55mm, wall thickness 0.24mm, annealed, 99.6+%

GF16213553

Titanium, wire reel, 10m, diameter 0.125mm, annealed, 99.6+%

GF16602768

Titanium, wire reel, 1m, diameter 0.5mm, as drawn, 99.99+%

GF26602321

Titanium, tube, 500mm, outside diameter 25.4mm, inside diameter 23.62mm, wall thickness 0.89mm, annealed, 99.6+%

GF90731505

Titanium, tube, 500mm, outside diameter 0.51mm, inside diameter 0.35mm, wall thickness 0.08mm, annealed, 99.6+%

GF95731960

Titanium, tube, 500mm, outside diameter 3.0mm, inside diameter 1.5mm, wall thickness 0.75mm, annealed, 99.6+%

GF13900205

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

GF66991179

Titanium, rod, 100mm, diameter 2mm, as drawn, 99.99+%

GF65515024

Titanium, tube, 1000mm, outside diameter 12.7mm, inside diameter 10.9mm, wall thickness 0.9mm, annealed, 99.6+%

GF31127712

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