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

348864

Sigma-Aldrich

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

348805

Sigma-Aldrich

Titanium, foil, thickness 0.5 mm, 99.99% 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

IRMM531A

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

460397

Sigma-Aldrich

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

267503

Sigma-Aldrich

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

366994

Sigma-Aldrich

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

267481

Sigma-Aldrich

Titanium, foil, thickness 0.25 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

GF76735963

Titanium, wire reel, 10m, diameter 0.75mm, as drawn, 99.6+%

GF83312209

Titanium, wire reel, 50m, diameter 1.5mm, as drawn, 99.6+%

GF77529639

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

GF75345565

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

GF79315027

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

GF69168662

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

GF86399106

Titanium, tube, 500mm, outside diameter 1.6mm, inside diameter 1.2mm, wall thickness 0.2mm, hard, 99.6+%

GF96944923

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

GF71724124

Titanium, tube, 500mm, outside diameter 12.7mm, inside diameter 10.9mm, wall thickness 0.9mm, annealed, 99.6+%

GF70333376

Titanium, wire reel, 10m, diameter 0.05mm, hard, 99.8%

GF80932822

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

GF66682288

Titanium, wire reel, 100m, diameter 0.5mm, as drawn, 99.6+%

GF69773181

Titanium, wire reel, 100m, diameter 1.0mm, as drawn, 99.6+%

GF77115506

Titanium, wire reel, 100m, diameter 0.05mm, hard, 99.8%

GF92756852

Titanium, tube, 500mm, outside diameter 4.25mm, inside diameter 3.75mm, wall thickness 0.25mm, annealed, 99.6+%

GF74389988

Titanium, wire reel, 0.5m, diameter 1.0mm, as drawn, 99.99+%

GF78234521

Titanium, wire reel, 1m, diameter 0.25mm, annealed, 99.6+%

GF78268056

Titanium, wire reel, 100m, diameter 0.20mm, annealed, 99.6+%

GF66180034

Titanium, tube, 500mm, outside diameter 1.05mm, inside diameter 0.75mm, wall thickness 0.15mm, annealed, 99.6+%