SYNTHESIS AND PROPERTY STUDY OF NANOPARTICLE QUATERNARY SEMICONDUCTOR SiCAlN FILMS WITH CO-SPUTTERING UNDER LOWER TEMPERATURE

2005 ◽  
Vol 12 (03) ◽  
pp. 397-400
Author(s):  
SHIYONG HUANG ◽  
S. XU ◽  
JIDONG LONG ◽  
ZHENHONG DAI ◽  
YUANPING SUN
Keyword(s):  
Low Temperature ◽  
Surface Morphology ◽  
Crystalline Structure ◽  
Element Content ◽  
Energy Dispersive ◽  
X Ray ◽  
Nanoparticle Films ◽  
Structure Surface ◽  
Chemical States ◽  
Lower Temperature

Quaternary SiCAlN nanoparticle films were produced by reactive rf magnetron co-sputtering technique with a chemically pure SiC and an Al target under low temperature. The crystalline structure, surface morphology, and element content of the films were studied in terms of sputtering parameters. The element content and chemical states of SiCAlN films were measured by means of energy dispersive X-ray fluorescence (EDX) and X-ray photoelectronic spectroscopy (XPS). Surface morphology of SiCAlN films was investigated by FE-SEM.

Crystalline structure and dielectric behavior of (Ce,Ba)TiO3 ceramics

2002 ◽  
Vol 17 (11) ◽  
pp. 2787-2793 ◽  
Author(s):  
Zhi Jing ◽  
Zhi Yu ◽  
Chen Ang
Keyword(s):  
Crystalline Structure ◽  
Dielectric Behavior ◽  
X Ray Diffraction ◽  
Molar Percentage ◽  
X Ray ◽  
Three Phase ◽  
Phase Transition Temperatures ◽  
Ce Substitution ◽  
Lower Temperature ◽  
Ce Content

In this work, (Ba1−xCex)Ti1−x/4(VTi)x/4O3 ceramics with x = 0.02, 0.04, 0.06, and 0.08 (VTi denotes titanium vacancies) were synthesized by the mixed-oxide method. The results of x-ray diffraction analysis and scanning electron microscopy show that all the samples are monophasic. The crystalline structure can be indexed as tetragonal for the samples with x ≤ 0.06, but as cubic for x = 0.08. Three phase transitions were observed in the temperature dependence of the dielectric permittivity, similar to those observed in pure BaTiO3, and the three phase transition temperatures (Tc, T1, and T2) shifted to lower temperatures with the rates of −18, −12, and −7 K per molar percentage of Ce3+, respectively. This is quite different from that observed in BaTiO3 with Ce substitution at the Ti-site, in which Tc shifted to a lower temperature, and T1 and T2 to higher temperatures. The permittivity maximum increased with increasing Ce content, which is mainly attributed to an increase in the grain size.

scholarly journals Possibility of the Discrimination of Different Chemical States by Energy-Dispersive X-Ray Spectroscopy.

1998 ◽  
Vol 14 (6) ◽  
pp. 1139-1144 ◽  
Author(s):  
Yanan XIAO ◽  
Shinjiro HAYAKAWA ◽  
Yohichi GOHSHI ◽  
Masaharu OSHIMA
Keyword(s):  
Energy Dispersive ◽  
X Ray ◽  
Chemical States

Structure of TlSr2PrCu207−x by Rietveld analysis

1994 ◽  
Vol 9 (3) ◽  
pp. 194-199
Author(s):  
Hoong-Kun Fun ◽  
Ping Yang ◽  
Rusli Othman ◽  
Tsong-Jen Lee ◽  
Chiou-Chu Lai ◽  
...  
Keyword(s):  
Low Temperature ◽  
Crystalline Structure ◽  
Powder Diffraction ◽  
Room Temperature ◽  
Goodness Of Fit ◽  
Rietveld Analysis ◽  
Crystal Data ◽  
X Ray ◽  
Tetragonal System

The crystalline structure of new TlSr2PrCu207−x was obtained at room temperature (300 K) and low temperature (100 K) from X-ray powder diffraction with CuKα radiation using Rietveld analysis. TlSr2PrCu207−x has an isotypical structure with TlBa2CaCu207 (1212). At 300 K, crystal data: Tl0.864Sr2PrCu2O6.75, Mr=727.811, the tetragonal system, P4/mmm, a =3.85404(5) Å, c = 12.1046(2) Å, V=179.80 Å3, Z=1, Dx =6.7218 g cm−3, μ =1143.922 cm−1 (λ = 1.54051 Å), F(000)=317.0, the structure was refined with 28 parameters to Rwp=5.29%, Rp = 3.65% for 3551 step intensities and Rb=7.40%, Rf=639% for 155 peaks, “goodness of fit” 5=3.05. At 100 K, crystal data: Tl0.858Sr2PrCu2O6.61, Mr=724.345, the tetragonal system, P4/mmm, a =3.84872(6) Å, c = 12.0771(3) Å, V=178.89 Å3, Z=1, Dx=6.7235 g cm−3, μ=1146.939 cm−1 (λ= 1.54051 Å), F(000) = 315.4, the structure was refined with 26 parameters to Rwp=6.70%, Rp=5.11% for 2926 step intensities and Rb=7.83%, Rf=6.70% for 131 peaks, “goodness of fit” S = 1.75.

Composition and Microstructure of a Furnace Ash Deposit from a Coal-Fired Utility Boiler

1980 ◽  
Vol 102 (3) ◽  
pp. 692-697
Author(s):  
R. R. Fessler ◽  
A. J. Skidmore ◽  
H. R. Hazard ◽  
J. P. Dimmer
Keyword(s):  
Iron Oxide ◽  
Low Temperature ◽  
Energy Dispersive ◽  
Spherical Particles ◽  
Tube Surface ◽  
X Ray ◽  
Melting Temperatures ◽  
Coal Particles ◽  
Wide Range ◽  
Ash Deposit

An exploratory study of the structure and composition of furnace-ash deposits was carried out using optical metallography, electron microprobe analysis, scanning electron microscopy, and energy-dispersive X-ray analysis. The results of these analyses were supplemented by studies of particulate melting temperatures using hot-stage microscopy to measure melting temperatures, and energy-dispersive X-ray analyses to measure composition of melted particles. It was found that the general structure of the ash deposit was a matrix of glassy, spherical particles having a wide range of compositions in which unfused particles containing iron oxide and calcium oxide were dispersed. At the imprint of the tube surface a considerable concentration of calcium, sulfur, and iron was found. Near the fused outer surface of the deposit, the glassy materials had melted into a porous, glassy slag containing spherical globules of iron oxide combined with other materials. There were no systematic compositional gradients from the tube surface to the fused outer layer except for the sulfur layer found only at the tube surface. However, there were significant differences in composition from particle to particle, and these differences were similar to those found in the coal mineral matter as isolated by low-temperature ashing. Single particles of low-temperature ash were found having low fusion temperatures, in the range of fusion temperatures for particles in furnace ash. Thus, the glassy spheres found in furnace deposits could originate from single coal particles, without the need for interactions among coal particles or ash particles.

Crystalline Structure and the Role of Low-Temperature-Deposited AlN and GaN on Sapphire Revealed by X-Ray CTR Scattering and X-Ray Reflectivity Measurements

2003 ◽  
Vol 10 (02n03) ◽  
pp. 537-541 ◽  
Author(s):  
Y. Takeda ◽  
M. Tabuchi ◽  
H. Amano ◽  
I. Akasaki
Keyword(s):  
Low Temperature ◽  
Crystalline Structure ◽  
Thin Layers ◽  
X Ray ◽  
Atomic Force ◽  
Crystal Truncation Rod ◽  
Before And After ◽  
Afm Observation

Crystalline and morphological quality of low-temperature (LT)-deposited and annealed AlN and GaN thin layers were investigated by X-ray crystal truncation rod (CTR) scattering and X-ray reflectivity measurements and atomic force microscope (AFM) observation. It was revealed that the LT-AlN layer was more uniform in terms of the crystalline structure and the layer thickness than the LT-GaN layer, before and after annealing. It suggests that LT-AlN is more suitable as a buffer layer between sapphire substrate and GaN.

Annealing effect on in-plane alignment and surface morphology of epitaxial Bi4Ti3O12 thin films prepared by the chemical solution deposition

2001 ◽  
Vol 16 (9) ◽  
pp. 2519-2525 ◽  
Author(s):  
K. Hwang ◽  
Y. Park
Keyword(s):  
Thin Films ◽  
Surface Morphology ◽  
Chemical Solution Deposition ◽  
Three Dimensional ◽  
Annealing Effect ◽  
Chemical Solution ◽  
Epitaxial Relationship ◽  
Solution Deposition ◽  
X Ray ◽  
Lower Temperature

Bi4Ti3O12 thin films were grown epitaxially on SrTiO3(100) substrates by chemical solution deposition using metal naphthenates as starting materials. Homogeneous Bi–Ti solution with toluene was spin-coated onto the substrates and pyrolyzed at 500 °C for 10 min in air. Highly c-axis-oriented Bi4Ti3O12 thin films were crystallized by annealing pyrolyzed films at ≥650 °C. The x-ray pole-figure analysis indicated that the Bi4Ti3O12 thin films have an epitaxial relationship with the SrTiO3(100) substrates. The surface morphology of the films annealed at lower temperature, i.e., 650 °C, exhibited flat and smooth surfaces, while films annealed at higher temperatures, i.e., 750 and 800 °C, were characterized by three-dimensional outgrowth.

Synthesis of TiO2 Nanostructure by DC Reactive Magnetron Sputtering and Hydrothermal Technique

2013 ◽  
Vol 634-638 ◽  
pp. 2311-2313
Author(s):  
Vipa Khiannok ◽  
Vatcharinkorn Mekla ◽  
Supanit Porntheerapat
Keyword(s):  
Electron Microscope ◽  
Hydrothermal Synthesis ◽  
Scanning Electron Microscope ◽  
Magnetron Sputtering ◽  
Crystalline Structure ◽  
Rutile Phase ◽  
Energy Dispersive ◽  
Reactive Magnetron ◽  
X Ray ◽  
Scanning Electron

Anatase and rutile TiO2 nanostructure have been successfully synthesized via CD reactive magnetron sputtering and hydrothermal synthesis followed by post-treatment from titanium powder. The morphology and crystalline structure of the nanostructure are characterized in detail with X-ray diffraction (XRD), Field Emissiom Scanning Electron Microscope (FE-SEM), Scanning Electron Microscope (SEM), energy dispersive X- ray and energy dispersive x-ray analyzer (EDX). The pattern showed anatase and rutile phase crystalline structure. The thin films showed the surface as viewed uniform tiny spots distribution. TiO2 nanostructures were successfully synthesized using a simple hydrothermal synthesis method from TiO2 nanSubscript textoparticles. The samples were synthesized by means of the hydrothermal reaction of TiO2 nanoparticle of anatase and rutile phase. In a typical procedure, The time were varied, and cooled to room temperature, naturally. The samples showed structures of crystalline, anatase and rutile phases. They were morphology TiO2 nanorods, TiO2 nanowires and TiO2 nano shape with the diameters of about 30-300 nm. The EDX analysis of an area containing a large amount of TiO2 nanostructure reveals the existence of Na, Ti and O elements.

scholarly journals Crystalline Structure, Surface Morphology and Optical Properties of Nanolamellar Composites Obtained by Intercalation of InSe with Cd

2015 ◽  
Vol 84 ◽  
pp. 149-155 ◽  
Author(s):  
D. Untila ◽  
I. Caraman ◽  
I. Evtodiev ◽  
V. Cantser ◽  
N. Spalatu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Morphology ◽  
Crystalline Structure ◽  
Structure Surface

scholarly journals Coal combustion residues characterization using scanning electron microscopy & energy dispersive x-ray (sem-edxa) analysis

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Charu Arora 1 ◽  
Ritesh Kumar 2 ◽  
Sadanand Sharma 2 ◽  
Ajit Kumar 2
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Coal Combustion ◽  
Thermal Power ◽  
Energy Dispersive ◽  
X Ray ◽  
Power Stations ◽  
Thermal Power Stations ◽  
Scanning Electron

The objective of the present study is to observe the surface morphology, structure and elemental composition of the ash particles produced from some thermal power stations of India using scanning electron microscopy (SEM) and energy dispersive x-ray analysis (EDXA). This information is useful to better understand the ash particles before deciding its utility in varied areas.

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