Grain-Orientation Control of Bi5FeTi3O15 Ceramics Prepared by Magnetic-Field-Assisted Electrophoretic Deposition Method

2008 ◽  
Vol 388 ◽  
pp. 205-208
Author(s):  
Muneyasu Suzuki ◽  
Tetsuo Uchikoshi ◽  
Yuji Noguchi ◽  
Masaru Miyayama
Keyword(s):  
Magnetic Field ◽  
Diffraction Analysis ◽  
Electrophoretic Deposition ◽  
Grain Orientation ◽  
Sintered Density ◽  
Deposition Method ◽  
X Ray Diffraction ◽  
Axis Orientation ◽  
Orientation Degree ◽  
X Ray

Magnetic-field-assisted electrophoretic deposition (B-assisted EPD) method has been applied for synthesizing a(b)-axis-oriented Bi5FeTi3O15 ceramics, and the effects of the B-assisted EPD on grain orientation and microstructures have been investigated. The sintering at 1100oC of the green compact obtained by the B-assisted EPD led to dense ceramics with a high relative sintered density of 98%. X-ray diffraction analysis shows that the a(b)-axis-orientation degree of the grain oriented ceramics evaluated by the Lotgering method was 45 %.

Electrophoretic Deposition of Organic - Inorganic Composites for Biomedical Applications

2012 ◽  
Vol 706-709 ◽  
pp. 617-622
Author(s):  
Rong Ma ◽  
Igor Zhitomirsky
Keyword(s):  
Electrophoretic Deposition ◽  
Biomedical Applications ◽  
Room Temperature ◽  
Deposition Time ◽  
Composite Films ◽  
Deposition Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inorganic Composites ◽  
Deposition Yield

Electrophoretic deposition method has been developed for the fabrication of organic-inorganic composite films, containing bioglass and hydroxyapatite in a hyaluronic acid matrix. The film composition and deposition yield were varied by variation of the electrochemical bath composition and deposition time. The films were studied by scanning electron microscopy, thermogravimetric analysis and X-ray diffraction methods. The deposition method offers the advantages of room temperature processing and allows the fabrication of composite films for biomedical applications.

Textured Ti3SiC2 by EPD in a Strong Magnetic Field

2012 ◽  
Vol 507 ◽  
pp. 15-19 ◽  
Author(s):  
Mrinalini Mishra ◽  
Yoshio Sakka ◽  
Chun Feng Hu ◽  
Tohru Suzuki ◽  
Tetsuo Uchikoshi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Zeta Potential ◽  
Diffraction Analysis ◽  
Strong Magnetic Field ◽  
Side Surface ◽  
Cationic Polyelectrolyte ◽  
Max Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Suspension Parameters

We present a method for fabrication of textured MAX phase ceramics, particularly, Ti3SiC2; by EPD in a strong magnetic field (12T). Ti3SiC2 was dispersed in cationic polyelectrolyte-Polyethylenimine (PEI). Addition of 0.3-1dwb PEI resulted in high zeta potential values and suspension was found to be stable and of good fluidity. The optimized suspension parameters for EPD were determined as 10vol% Ti3SiC2 and 1dwb PEI in 50 % ethanolic water at pH ~ 7. X-ray diffraction analysis of the textured samples revealed that the preferred orientation of Ti3SiC2 grains parallel to the magnetic eld direction was along the a,b-axis. The Lotgering orientation factors on the textured top surface and textured side surface were determined as f (hk0) = 0.35 and f (00l) = 0.75, respectively.

Electrophoretic deposition of α-alumina particles in a strong magnetic field

2003 ◽  
Vol 18 (2) ◽  
pp. 254-256 ◽  
Author(s):  
Tetsuo Uchikoshi ◽  
Tohru S. Suzuki ◽  
Hideo Okuyama ◽  
Yoshio Sakka
Keyword(s):  
Magnetic Field ◽  
Strong Magnetic Field ◽  
Electrophoretic Deposition ◽  
Diamagnetic Susceptibility ◽  
Aqueous Media ◽  
X Ray Diffraction ◽  
Single Crystalline ◽  
X Ray ◽  
Stable Suspension ◽  
Alumina Particles

The electrophoretic deposition of single-crystalline α-alumina particles dispersed in aqueous media was performed in a strong magnetic field of 10 T. The α-alumina particles in the stable suspension were aligned due to their anisotropic diamagnetic susceptibility and then deposited on a cathodic substrate. The orientation of the α-alumina crystallites was confirmed by x-ray diffraction of the sintered specimen.

Texturation of YBa2Cu3O7-δ Thick Films by Electrophoretic Deposition under Magnetic Field

2006 ◽  
Vol 314 ◽  
pp. 153-158 ◽  
Author(s):  
L. Dusoulier ◽  
S. Denis ◽  
N. Nutal ◽  
Catherine Henrist ◽  
B. Vanderheyden ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electrophoretic Deposition ◽  
Substrate Surface ◽  
Thick Films ◽  
X Ray Diffraction ◽  
Surface Scanning ◽  
X Ray ◽  
Axis Alignment ◽  
Polarised Light ◽  
Scanning Electron

YBa2Cu3O7-δ coatings were deposited by electrophoretic deposition (EPD) onto Ni substrates. Particles of different sizes and shapes were used in order to study the influence of the powder microstructure on the film density. Texturation of the thick films was induced by application of a magnetic field during the electrophoretic deposition. X-ray diffraction analysis has clearly shown preferred c-axis alignment of the YBa2Cu3O7-δ films along the direction normal to the substrate surface. Scanning electron microscopy and optical polarised light microscopy were used to characterise the microstructure of the coatings, revealing a nonrandom platelets organisation.

Ten-Vertex Polyhedral Monocarbaborane Chemistry. The Novel High-Yield Formation of the Ten-Vertex closo Compound [6-(PMe2Ph)-closo-1-CB9H9] from the Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11]

1993 ◽  
Vol 58 (12) ◽  
pp. 2924-2935 ◽  
Author(s):  
Jane H. Jones ◽  
Bohumil Štíbr ◽  
John D. Kennedy ◽  
Mark Thornton-Pett
Keyword(s):  
Nmr Spectroscopy ◽  
Diffraction Analysis ◽  
High Yield ◽  
Monoclinic Space Group ◽  
The Novel ◽  
X Ray Diffraction ◽  
Metal Centre ◽  
X Ray ◽  
Yield Formation ◽  
Boiling Toluene

Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11] in boiling toluene solution results in an elimination of the platinum centre and cluster closure to give the ten-vertex closo species [6-(PMe2Ph)-closo-1-CB9H9] in 85% yield as a colourles air stable solid. The product is characterized by NMR spectroscopy and single-crystal X-ray diffraction analysis. Crystals (from hexane-dichloromethane) are monoclinic, space group P21/c, with a = 903.20(9), b = 1 481.86(11), c = 2 320.0(2) pm, β = 97.860(7)° and Z = 8, and the structure has been refined to R(Rw) = 0.045(0.051) for 3 281 observed reflections with Fo > 2.0σ(Fo). The clean high-yield elimination of a metal centre from a polyhedral metallaborane or metallaheteroborane species is very rare.

Bis(μ-carboxylato)dienerhodium(I) Complexes - Synthesis, Characterization and Catalytic Activity

2008 ◽  
Vol 73 (8-9) ◽  
pp. 1205-1221 ◽  
Author(s):  
Jiří Zedník ◽  
Jan Sedláček ◽  
Jan Svoboda ◽  
Jiří Vohlídal ◽  
Dmitrij Bondarev ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Diffraction Analysis ◽  
Spectroscopic Methods ◽  
X Ray Diffraction ◽  
X Ray

Dinuclear rhodium(I) η2:η2-cycloocta-1,5-diene (series a) and η2:η2-norborna-2,5-diene (series b) complexes with μ-RCOO- ligands, where R is linear C21H43 (complexes 1a, 1b), CH2CMe3 (2a, 2b), 1-adamantyl (3a, 3b) and benzyl (4a, 4b), have been prepared and characterized by spectroscopic methods. Structures of complexes 2b, 3a and 4a were determined by X-ray diffraction analysis. Complexes prepared show low to moderate catalytic activity in polymerization of phenylacetylene in THF giving high-cis-transoid polymers, but they show only oligomerization activity in dichloromethane.

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