The Synthesis and Characterization of SrTiO3 Film Fabricated by Micro Arcoxidation

2011 ◽  
Vol 311-313 ◽  
pp. 1262-1266 ◽  
Author(s):  
Hui Yong Guo ◽  
Wen Bo Huang ◽  
Wen Fang Li ◽  
Guo Ge Zhang ◽  
En Fu Wang
Keyword(s):  
Surface Morphology ◽  
High Dielectric Constant ◽  
Electrolyte Concentration ◽  
Pure Titanium ◽  
Xrd Analysis ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Dielectric

Pure titanium plates as anode and mixture of solutions containing 0.2M Sr(OH)2and 0.2M NaOH as electrolyte, titanium plates were microarc-oxidated for 10 minutes. X-Ray Diffraction (XRD) analysis indicated that SrTiO3film was successfully deposited. The MAO film is composed mainly of tetragonal SrTiO3phases and found to possess high dielectric constant of 371.0 at the frequency of 1 kHz. Scanning Electron Microscopy (SEM) and portable roughness tester were used to characterize the surface morphology and roughness values(Ra), The influences of electrolyte concentration, current density and frequency on the surface morphology of SrTiO3film were investigated in detail . several rules were drawn from the results. A kinetics expression was established for the growth of film thickness and agreed well with the experimental results.

The Synthesis and Characterization of Ba0.5Sr0.5TiO3 Film Fabricated by Micro Arc Oxidation

2012 ◽  
Vol 151 ◽  
pp. 266-270
Author(s):  
Ming Wang ◽  
Hui Yong Guo ◽  
Wen Bo Huang ◽  
Wen Fang Li
Keyword(s):  
Surface Morphology ◽  
High Dielectric Constant ◽  
Energy Dispersive Spectrometer ◽  
X Ray Diffraction ◽  
Titanium Plate ◽  
X Ray ◽  
Low Dielectric ◽  
Micro Arc Oxidation ◽  
High Dielectric

Ba0.5Sr0.5TiO3film was successfully fabricated by micro arc oxidation of titanium plate in aqueous solution containing Sr(OH)2and Ba(OH)2for 25 minutes. X-ray diffraction , energy dispersive spectrometer and scanning electron microscopy were used to characterize the crystalline structure, elements composition and surface morphology and HP4284 capacitance prober was used to analyze the dielectric properties of the film. The micro arc oxidation film is mainly composed of tetragonal Ba0.5Sr0.5TiO3 phases and possesses both high dielectric constant of 454.2 and low dielectric loss of 0.052 at the frequency of 100Hz.The surface morphology appeares smooth and homogeneous except that some holes are uniformly distributed outwardly.

Fabrication and Characterization of Metal-Ferroelectric-Gan Structures

1999 ◽  
Vol 595 ◽  
Author(s):  
W.P. Li ◽  
R. Zhang ◽  
J. Yin ◽  
X.H. Liu ◽  
Y.G. Zhou ◽  
...  
Keyword(s):  
High Frequency ◽  
High Dielectric Constant ◽  
Oxide Thickness ◽  
X Ray Diffraction ◽  
X Ray ◽  
Active Layers ◽  
Pzt Films ◽  
High Dielectric ◽  
Mos Structures

AbstractGaN-based metal-ferroelectric-semiconductor (MFS) structure has been fabricated by using ferroelectric Pb(Zr0.53Ti0.47)O3 (PZT) instead of conventional oxides as gate insulators. The GaN and PZT films in the MFS structures have been characterized by various methods such as photoluminescence (PL), wide-angle X-ray diffraction (XRD) and high-resolution X-ray diffraction (HRXRD). The Electric properties of GaN MFS structure with different oxide thickness have been characterized by high-frequency C-V measurement. When the PZT films are as thick as 1 µm, the GaN active layers can approach inversion under the bias of 15V, which can not be observed in the traditional GaN MOS structures. When the PZT films are about 100 nm, the MFS structures can approach inversion just under 5V. All the marked improvements of C-V behaviors in GaN MFS structures are mainly attributed to the high dielectric constant and large polarization of the ferroelectric gate oxide.

Synthesis and Characterization of Ag/TiO2 Thin Film via Sol-Gel Method

2018 ◽  
Vol 273 ◽  
pp. 140-145 ◽  
Author(s):  
Dewi Suriyani Che Halin ◽  
Norsuria Mahmed ◽  
Mohd Arif Anuar Mohd Salleh ◽  
A.N. Mohd Sakeri ◽  
Kamrosni Abdul Razak
Keyword(s):  
Surface Morphology ◽  
Spin Coating ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Drying Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Coating Method ◽  
Structural Surface

Ag/TiO2thin films were prepared via sol-gel spin coating method. Structural, surface morphology and optical properties were investigated with the addition of two different amount of silver (Ag). X-ray diffraction pattern shows the sample with pure TiO2, the only phase presence was brookite TiO2. When the Ag content added into the solution, the phase existed for the samples with TiO2doped 0.5g Ag and TiO2doped 1.0g Ag were anatase TiO2with no peak corresponds to Ag phase. The surface morphology of film was characterized by scanning electron microscopy (SEM). The films were annealed at 450 °C and it shows non-uniform films. The films have a large flaky and cracks film which was attributed to surface tension between the film and the air during the drying process. When the solution of sol was added with Ag content, it shows the porous structure with flaky-crack films. With the increasing of the Ag content from 0.5g to 1.0g, the structure is more porous and it is good for the photocatalytic activity. The UV-Vis spectra shows that the film exhibits a low absorbance which was due to the substrate is inhomogeneously covered by the flaky-crack films.

Synthesis and Characterization of Nano Hydroxylapatite by Reaction Precipitation in Impinging Streams

2010 ◽  
Vol 160-162 ◽  
pp. 1301-1308 ◽  
Author(s):  
Jun Yuan ◽  
Yuan Wu ◽  
Qi Xin Zheng ◽  
Xiao Lin Xie
Keyword(s):  
Electron Microscopy ◽  
Xrd Analysis ◽  
Synthesis And Characterization ◽  
Preparation Process ◽  
X Ray Diffraction ◽  
Excellent Performance ◽  
X Ray ◽  
Operation Conditions ◽  
Transmission Electron

Hydroxylapatite(HAP) nano-whiskers are prepared by reaction-precipitation in the submerged circulative impinging stream reactor(SCISR), with (NH4)2HPO4 and Ca(NO3)2 as the reagents; and the products are characterized by X-ray diffraction (XRD) analysis, Fourier transform infrared (FTIR) spectroscopy, Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM). The results TEM measured indicate that the product prepared under typical operation conditions is average-sized 15nm and 50-70nm long. Multiply repeated experiments illustrates that, because of the excellent performance of the reactor, the preparation process can be easily controlled to yield nano rod/whisker hydroxylapatite with very narrow size distribution.

Bioglasses in the SiO2-CaO-P2O5 System

2008 ◽  
Vol 47-50 ◽  
pp. 1063-1066 ◽  
Author(s):  
Costel Birsan ◽  
Cristina Ghitulica ◽  
Ecaterina Andronescu ◽  
Cristina Ionita ◽  
Mihaela Birsan
Keyword(s):  
Body Fluid ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Silica Content ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Physiological Serum ◽  
P2o5 System

The aim of the study was the synthesis and characterization of bioactive osteoinductive glasses, in the SiO2 – CaO – P2O5 system. In order to maintain the bioactive character of bioglasses, for SiO2 contents higher than 60%, the sol – gel method was used for preparation. On the obtained powders, thermal, grain size and X - ray diffraction analysis were performed. The X - ray diffraction emphasized the formation of phosphate phases, whose proportion decreases as the silica content is increased. Later, the powders were thermally treated at temperatures between 1000 and 14000C, the phase composition evolution being monitored through XRD analysis. On the powder suspensions in physiological serum, the evolution of pH was investigated, in order to establish the chemical stability. The behavior of the obtained powders in physiological medium was studied, by immersing samples in simulated body fluid and excerpted after different periods of time.

scholarly journals Fabrication and Characterization of Metalferroelectric-GAN Structures

2000 ◽  
Vol 5 (S1) ◽  
pp. 598-604
Author(s):  
W.P. Li ◽  
R. Zhang ◽  
J. Yin ◽  
X.H. Liu ◽  
Y.G. Zhou ◽  
...  
Keyword(s):  
High Frequency ◽  
High Dielectric Constant ◽  
Oxide Thickness ◽  
X Ray Diffraction ◽  
X Ray ◽  
Active Layers ◽  
Pzt Films ◽  
High Dielectric ◽  
Mos Structures

GaN-based metal-ferroelectric-semiconductor (MFS) structure has been fabricated by using ferroelectric Pb(Zr0.53Ti0.47)O3 (PZT) instead of conventional oxides as gate insulators. The GaN and PZT films in the MFS structures have been characterized by various methods such as photoluminescence (PL), wide-angle X-ray diffraction (XRD) and high-resolution X-ray diffraction (HRXRD). The Electric properties of GaN MFS structure with different oxide thickness have been characterized by high-frequency C-V measurement. When the PZT films are as thick as 1 μm, the GaN active layers can approach inversion under the bias of 15V, which can not be observed in the traditional GaN MOS structures. When the PZT films are about 100 nm, the MFS structures can approach inversion just under 5V. All the marked improvements of C-V behaviors in GaN MFS structures are mainly attributed to the high dielectric constant and large polarization of the ferroelectric gate oxide.

Structural and dielectric properties of Ca1-x MgxCu3Ti4O12 thin films

2003 ◽  
Vol 785 ◽  
Author(s):  
L. A. Bermúdez ◽  
R. P. Guzman ◽  
M.S. Tomar ◽  
R.E. Melgarejo
Keyword(s):  
Thin Films ◽  
Single Phase ◽  
High Dielectric Constant ◽  
Film Material ◽  
X Ray Diffraction ◽  
Detailed Characterization ◽  
Chemical Route ◽  
X Ray ◽  
High Dielectric

ABSTRACTCa1-xMgxCu3Ti4O12 material has been synthesized by chemical route for different compositions and thin films have been deposited by spin coating. X-ray diffraction and Raman spectroscopy were used for detailed characterization of this material for both powder and thin films. X-ray diffraction shows single phase film material for different compositions x < 0.80. The initial measurements on dielectric response indicates high dielectric constant > 10, 000 for the composition x = 0.1.

scholarly journals On the Synthesis and Characterization of Lanthanide Metal-Organic Frameworks

Ceramics ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 54-64 ◽  
Author(s):  
Andrius Laurikenas ◽  
Aldona Beganskiene ◽  
Aivaras Kareiva
Keyword(s):  
Metal Organic Frameworks ◽  
Xrd Analysis ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Nitrates ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Benzenetricarboxylic Acid

In this study, lanthanide metal-organic frameworks Ln(BTC)(DMF)2(H2O) (LnMOFs) are synthesized using the metal nitrates as lanthanide (Ln = La, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb and Lu) source and 1,3,5-benzenetricarboxylic acid (BTC) as a coordination ligand. X-ray diffraction (XRD) analysis, Fourier-transform infrared spectroscopy (FTIR), thermogravimetric (TG/DTG) analysis fluorescence spectroscopy (FLS), and scanning electron microscopy (SEM) are employed to characterize the newly synthesized LnMOFs.

Synthesis and characterization of TiN / Ti / AISI 410 coatings

2018 ◽  
Vol 2 (1) ◽  
pp. 7
Author(s):  
S Chirino ◽  
Jaime Diaz ◽  
N Monteblanco ◽  
E Valderrama
Keyword(s):  
Synthesis And Characterization ◽  
Photoemission Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Columnar Grains ◽  
Tin Thin Films ◽  
Steel Aisi ◽  
Interacting Surfaces ◽  
Stainless Steel Aisi

The synthesis and characterization of Ti and TiN thin films of different thicknesses was carried out on a martensitic stainless steel AISI 410 substrate used for tool manufacturing. The mechanical parameters between the interacting surfaces such as thickness, adhesion and hardness were measured. By means of the scanning electron microscope (SEM) the superficial morphology of the Ti/TiN interface was observed, finding that the growth was of columnar grains and by means of EDAX the existence of titanium was verified.  Using X-ray diffraction (XRD) it was possible to observe the presence of residual stresses (~ -3.1 GPa) due to the different crystalline phases in the coating. Under X-ray photoemission spectroscopy (XPS) it was possible to observe the molecular chemical composition of the coating surface, being Ti-N, Ti-N-O and Ti-O the predominant ones.

scholarly journals Synthesis and Characterization of Clay Polymer Nanocomposites of P(4VP-co-AAm) and Their Application for the Removal of Atrazine

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 721 ◽  
Author(s):  
Jorge A. Ramírez-Gómez ◽  
Javier Illescas ◽  
María del Carmen Díaz-Nava ◽  
Claudia Muro-Urista ◽  
Sonia Martínez-Gallegos ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Nanocomposite Materials ◽  
Synthesis And Characterization ◽  
Cross Linking ◽  
X Ray Diffraction ◽  
Numerous Species ◽  
X Ray ◽  
Different Types ◽  
Synthesized Materials

Atrazine (ATZ) is an herbicide which is applied to the soil, and its mechanism of action involves the inhibition of photosynthesis. One of its main functions is to control the appearance of weeds in crops, primarily in corn, sorghum, sugar cane, and wheat; however, it is very toxic for numerous species, including humans. Therefore, this work deals with the adsorption of ATZ from aqueous solutions using nanocomposite materials, synthesized with two different types of organo-modified clays. Those were obtained by the free radical polymerization of 4-vinylpyridine (4VP) and acrylamide (AAm) in different stoichiometric ratios, using tetrabutylphosphonium persulfate (TBPPS) as a radical initiator and N,N′-methylenebisacrylamide (BIS) as cross-linking agent. The structural, morphological, and textural characteristics of clays, copolymers, and nanocomposites were determined through different analytical and instrumental techniques, i.e., X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). Adsorption kinetics experiments of ATZ were determined with the modified and synthesized materials, and the effect of the ratio between 4VP and AAm moieties on the removal capacities of the obtained nanocomposites was evaluated. Finally, from these sets of experiments, it was demonstrated that the synthesized nanocomposites with higher molar fractions of 4VP obtained the highest removal percentages of ATZ.

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