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

366994

Sigma-Aldrich

Titanium, powder, <45 μm avg. part. size, 99.98% trace metals basis

268496

Sigma-Aldrich

Titanium, powder, −100 mesh, 99.7% trace metals basis

268526

Sigma-Aldrich

Titanium, sponge, 1-20 mm, 99.5% trace metals basis

433667

Sigma-Aldrich

Titanium, evaporation slug, diam. × L 6.3 mm × 6.3 mm, ≥99.99% trace metals basis

267481

Sigma-Aldrich

Titanium, foil, thickness 0.25 mm, 99.99% trace metals basis

267503

Sigma-Aldrich

Titanium, foil, thickness 0.25 mm, 99.7% trace metals basis

460397

Sigma-Aldrich

Titanium, foil, thickness 0.127 mm, ≥99.99% trace metals basis

348864

Sigma-Aldrich

Titanium, wire, diam. 0.5 mm, 99.99% trace metals basis

IRMM531A

Titanium, IRMM^®, certified reference material, 0.1 mm foil

348805

Sigma-Aldrich

Titanium, foil, thickness 0.5 mm, 99.99% trace metals basis

767506

Sigma-Aldrich

Titanium, sputtering target, diam. × thickness 2.00 in. × 0.25 in., 99.995% trace metals basis

GF01312490

Titanium, rod, 500mm, diameter 16mm, annealed, 99.6+%

GF34739837

Titanium, sphere, 200pcs, diameter 3mm, 99.6+%

GF73915128

Titanium, tube, 100mm, outside diameter 6.35mm, inside diameter 4.57mm, wall thickness 0.89mm, annealed, 99.6+%

GF38954076

Titanium, rod, 200mm, diameter 6mm, annealed, 99.6+%

GF73866998

Titanium, tube, 100mm, outside diameter 12.7mm, inside diameter 10.9mm, wall thickness 0.9mm, annealed, 99.6+%

GF51058784

Titanium, wire reel, 500m, diameter 0.25mm, as drawn, 99.6+%

GF75345565

Titanium, wire reel, 2m, diameter 0.5mm, as drawn, 99.99+%

GF18195857

Titanium, wire reel, 5m, diameter 0.5mm, as drawn, 99.99+%

GF26976853

Titanium, wire reel, 1m, diameter 0.75mm, as drawn, 99.6+%

GF04455299

Titanium, wire reel, 200m, diameter 0.05mm, hard, 99.8%

GF33302832

Titanium, wire reel, 1m, diameter 1.0mm, annealed, 99.6+%

GF28054504

Titanium, wire reel, 500m, diameter 0.25mm, annealed, 99.6+%

GF96944923

Titanium, wire reel, 5m, diameter 0.25mm, as drawn, 99.6+%

GF69168662

Titanium, wire reel, 20m, diameter 0.75mm, as drawn, 99.6+%

GF98748152

Titanium, wire reel, 1m, diameter 1.0mm, as drawn, 99.99+%

GF50643479

Titanium, wire reel, 5m, diameter 1.5mm, as drawn, 99.6+%

GF33373795

Titanium, tube, 200mm, outside diameter 12.7mm, inside diameter 10.9mm, wall thickness 0.9mm, annealed, 99.6+%

GF08432726

Titanium, tube, 200mm, outside diameter 0.81mm, inside diameter 0.61mm, wall thickness 0.1mm, as drawn, 99.6+%

GF64001214

Titanium, tube, 500mm, outside diameter 10mm, inside diameter 8mm, wall thickness 1.0mm, annealed, 99.6+%