Preparation of Barium Titanate Grain-Oriented Ceramics by Electrophoresis Deposition Method under High Magnetic Field Using Single-Domain Nanoparticles

Barium titanate (BaTiO3, BT) grain-oriented ceramics were prepared by electrophoresis deposition (EPD) method under high magnetic field (HM-EPD) of 12 T. For this objective, the BT single-domain nanoparticles with highc/aratio of 1.008 and size of 103 nm were prepared by two-step thermal decomposition method. Using the BT nanoparticle slurry, BT nanoparticle accumulations were prepared by EPD or slipcasting (SC) methods with/without high magnetic field. After binder burnout, these accumulations were sintered at 1350 °C and it was revealed that only the BT ceramics prepared by the HM-EPD method was assigned to grain-oriented ceramics with weak preferential crystallographic orientation along [11 direction.

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Preparation of Barium Titanate Nanoperticles with Necking Structure/Polymer Complex and their Dielectric Properties

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.582.23 ◽

2013 ◽

Vol 582 ◽

pp. 23-26

Author(s):

Shuhei Tsukamoto ◽

Ichiro Fujii ◽

Kouichi Nakashima ◽

Takahiro Takei ◽

Nobuhiro Kumada ◽

...

Keyword(s):

Thermal Decomposition ◽

Dielectric Properties ◽

Barium Titanate ◽

Decomposition Method ◽

Solvothermal Method ◽

Polymer Complex ◽

Deposition Method ◽

Film Capacitor ◽

Thermal Decomposition Method ◽

Electrophoresis Deposition

Barium titanate (BaTiO3) nanoparticles were prepared by a 2-step thermal decomposition method using nanooxalate particles. BaTiO3 nanoparticles were characterized using various methods. Accumulations were prepared by electrophoresis deposition method using the obtained BaTiO3 nanoparticles. They were performed necking structure by a solvothermal method. Polymer was infiltrated into the accumulations in vacuum to prepare a polymer film capacitor.

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Preparation and characterization of Grain-Oriented Barium Titanate Ceramics Using Electrophoresis Deposition Method under A High Magnetic Field

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/18/9/092041 ◽

2011 ◽

Vol 18 (9) ◽

pp. 092041

Author(s):

T Kita ◽

S Kondo ◽

T Takei ◽

N Kumada ◽

K Nakashima ◽

...

Keyword(s):

Magnetic Field ◽

Barium Titanate ◽

High Magnetic Field ◽

Deposition Method ◽

Electrophoresis Deposition ◽

Titanate Ceramics

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Preparation and Characterization of Grain-Oriented Barium Titanate Ceramics Using Electrophoresis Deposition Method under a High Magnetic Field

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.485.313 ◽

2011 ◽

Vol 485 ◽

pp. 313-316 ◽

Cited By ~ 4

Author(s):

Tatsuya Kita ◽

Shuhei Kondo ◽

Takahiro Takei ◽

Nobuhiro Kumada ◽

Kouichi Nakashima ◽

...

Keyword(s):

Magnetic Field ◽

Barium Titanate ◽

High Magnetic Field ◽

Grain Orientation ◽

Deposition Method ◽

Lattice Constants ◽

Electrophoresis Deposition ◽

Titanate Ceramics

Grain-oriented Barium titanate (BaTiO3) ceramics were prepared using an electrophoresis deposition (EPD) method under high magnetic field of 12 T and sintering at 1350 °C. It was found that BT03 and BTKK nanoparticles were necessary to synthesize the grain-oriented BT ceramics. The grain orientation was correlated with particles size and c/a ratio of lattice constants. The reason why the grain-oriented BT ceramics using the BT03 and BTKK were prepared was having the large values of the particles size and the c/a ration of lattice constants.

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Self-standing magnetic composite nanosheets prepared in the presence of an external magnetic field: Characterization and potential for medical applications

Journal of Chemical Research ◽

10.1177/1747519820958604 ◽

2020 ◽

pp. 174751982095860

Author(s):

Mina Sakuragi ◽

Yoshikazu Takahashi ◽

Keito Ehara ◽

Katsuki Kusakabe

Keyword(s):

Magnetic Field ◽

Thermal Decomposition ◽

External Magnetic Field ◽

Decomposition Method ◽

Sol Gel ◽

Magnetic Composite ◽

Magnetic Response ◽

Gel Method ◽

Sol Gel Method ◽

Thermal Decomposition Method

The aim of this study is to develop self-standing, ultrathin film, nanosheets with high magnetic response for use in a medical device that can be migrated to a target location in the body by using an external magnetic field. First, iron oxide nanoparticles are synthesized by either the sol-gel method or thermal decomposition. The resulting magnetic properties of the nanoparticles show that the thermal decomposition method provides a greater saturation magnetization value than the sol-gel method. Next, the nanoparticles obtained by the thermal decomposition method are embedded into nanosheets of poly(L-lactide) at varying concentrations. Embedding of the nanoparticles in the composite nanosheets is achieved by the application of an external magnetic field. The composite nanosheets are then characterized. The thickness of the nanosheet increases, and the nanoparticles are well dispersed, with an increase in poly (L-lactide) concentration. The NP-embedded nanosheets are imaged by transmission electron microscopy, which reveals thin, long aggregates aligned in collinear line features. X-ray diffraction results indicate that the magnetic hard axis of the nanoparticles in the nanosheets is aligned in parallel to the plane of the nanosheet by magnetic field application during nanosheet preparation. In addition, the nanosheets at high poly (L-lactide) concentrations that had been subjected to a magnetic field during preparation show a slightly greater magnetic response compared with both nanosheets without magnetic field exposure and nanosheets prepared at low poly (L-lactide) concentrations.

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