A Novel Route For The Synthesis of LiAlxCo1−xO2 Battery Materials And Their Structural Properties

2000 ◽  
Vol 658 ◽  
Author(s):  
M. S. Tomar ◽  
A. Hidalgo ◽  
P. S. Dobal ◽  
R. S. Katiyar ◽  
A. Dixit ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Raman Spectroscopy ◽  
Rechargeable Batteries ◽  
X Ray Diffraction ◽  
Battery Materials ◽  
X Ray ◽  
Micro Raman Spectroscopy ◽  
Al Substitution ◽  
Constituent Elements

ABSTRACTLiCoO2 is an important cathode material for rechargeable batteries. Al substitution on Co sites was recently found to enhance its intercalation voltage. We have developed a reliable and less expensive method for the synthesis of such LiAlxCo1−xO2 compositions using simple salts of the constituent elements and organic solvents. X-ray diffraction and Raman spectroscopy were used for structural characterization of these materials at various annealing temperatures. The phase evolutions in LiAlxCo1−xO2 compositions were studied using micro-Raman spectroscopy and a phase diagram is proposed based on the observations. The phase diagram suggests that thin films of these materials can be deposited at substrate temperature at about 650°C

scholarly journals Mineral characterization of soil type ranker formed on serpentines occurring in southern Belgrade environs Bubanj Potok

2012 ◽  
Vol 27 (2) ◽  
pp. 131-136
Author(s):  
Bozidar Cekic ◽  
Valentin Ivanovski ◽  
Aleksandar Djordjevic ◽  
Velimir Aleksic ◽  
Zorica Tomic ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Raman Spectroscopy ◽  
Soil Type ◽  
X Ray Diffraction ◽  
X Ray ◽  
Micro Raman Spectroscopy ◽  
Detrital Mineral ◽  
Scanning Electron

The paper addresses the issue of health risk associated with the presence of chrysotile in the soil type ranker formed on massive serpentines occurring in the area of Bubanj Potok, a settlement located in the southern Belgrade environs, Serbia. Characterization of the ranker soil was conducted by scanning electron microscopy, X-ray diffraction, micro-Raman spectroscopy and transmission 57Fe M?ssbauer spectroscopy. Scanning electron microscopy figures showed regular shaped smectite (montmorillonite) particles, aggregates of chlorite, and elongated sheets of serpentines minerals antigorite. X-ray diffraction analysis confirmed the presence of detrital mineral quartz polymorph as well as minor amounts of other mineral species. Micro-Raman spectroscopy identified the presence of dominant minerals, such as montmorillonite, kaolinite, muscovite, gypsum, calcite, albite, amphiboles (hornblende/kaersutite) and orthoclase. Important polymorph silica modifications of quartz, olivine (forsterite), pyroxene (enstatite/ferrosilite, diopside/hedenbergite), and serpentine (antigorite/lizardite/chrysotile) were identified.

scholarly journals Characterization of the distribution, polymorphism, and stability of nimodipine in its solid dispersions in polyethylene glycol by micro-Raman spectroscopy and powder x-ray diffraction

2007 ◽  
Vol 9 (3) ◽  
pp. E361-E370 ◽  
Author(s):  
Aristides Docoslis ◽  
Krista L. Huszarik ◽  
George Z. Papageorgiou ◽  
Dimitrios Bikiaris ◽  
Anagnostis Stergiou ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Polyethylene Glycol ◽  
Solid Dispersions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Micro Raman Spectroscopy

Deposition of TRISO Particles With Superhard SiC Coatings and the Characterization of Anisotropy by Raman Spectroscopy

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
E. López-Honorato ◽  
P. J. Meadows ◽  
J. Tan ◽  
Y. Xiang ◽  
P. Xiao
Keyword(s):  
Solid Solution ◽  
Raman Spectroscopy ◽  
Pyrolytic Carbon ◽  
X Ray Diffraction ◽  
X Ray ◽  
Flat Substrate ◽  
High Concentrations ◽  
Triso Particles ◽  
Sic Coatings

In this work we have deposited silicon carbide (SiC) at 1300°C with the addition of small amounts of propylene. The use of propylene and high concentrations of methyltrichlorosilane (9 vol %) allowed the deposition of superhard SiC coatings (42 GPa). The superhard SiC could result from the presence of a SiC–C solid solution, undetectable by X-ray diffraction but visible by Raman spectroscopy. Another sample obtained by the use of 50 vol % Argon, also showed the formation of SiC with good properties. The use of a flat substrate together with the particles showed the importance of carrying out the analysis on actual particles rather than in flat substrates. We show that it is possible to characterize the anisotropy of pyrolytic carbon by Raman spectroscopy.

Combined synchrotron x-ray diffraction and micro-Raman for following in situ the growth of solution-deposited YBa2Cu3O7 thin films

2005 ◽  
Vol 20 (12) ◽  
pp. 3270-3273 ◽  
Author(s):  
F. Berberich ◽  
H. Graafsma ◽  
B. Rousseau ◽  
A. Canizares ◽  
R. Ramy Ratiarison ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Additional Information ◽  
Micro Raman Spectroscopy ◽  
High Temperature Process ◽  
Structural Growth ◽  
Metal Organic ◽  
Insight Into

A unique combination of in situ synchrotron x-ray diffraction and in situ micro-Raman spectroscopy was used to study the growth process of YBa2Cu3O6+x films obtained by metal organic decomposition using trifluoroacetate precursor on LaAlO3 substrates. The techniques give complementary information: x-ray diffraction gives insight into the structural growth, whereas micro-Raman spectroscopy gives information of the chemical composition with additional information on the texture. To perform both experiments in situ, a special high-temperature process chamber was designed.

Thermal Silicidation of Ni/SiGe and Characterization of Resulting Silicide Films Using Raman Spectroscopy and X-ray Diffraction

2020 ◽  
Vol 98 (5) ◽  
pp. 457-464
Author(s):  
Woo Sik Yoo ◽  
Kitaek Kang ◽  
Toshikazu Ishigaki ◽  
Jung Gon Kim ◽  
Noriyuki Hasuike ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals New insights on the crystalline forms in binary systems of n-alkanes: Characterization of the solid ordered phases in the phase diagram tricosane + pentacosane

1999 ◽  
Vol 14 (6) ◽  
pp. 2644-2654 ◽  
Author(s):  
F. Rajabalee ◽  
V. Métivaud ◽  
D. Mondieig ◽  
Y. Haget ◽  
M. A. Cuevas-Diarte
Keyword(s):  
Phase Diagram ◽  
Binary Systems ◽  
The Other ◽  
Structural Behavior ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ordered Phases ◽  
Crystalline Forms ◽  
Mixed Samples

X-ray diffraction analyses of the pure components n-tricosane and n-pentacosane and of their binary mixed samples have enabled us to characterize the crystalline phases observed at “low temperature.” Contrary to what was announced in literature on the structural behavior of mixed samples in odd-odd binary systems with Δn = 2, the three domains are not all orthorhombic. This work has enabled us to show that two of the domains are, in fact, monoclinic (Aa, Z = 4), and the other one is orthorhombic (Pca21, Z = 4). The conclusions drawn in this work can easily be transposed to other binary systems of n-alkanes.

Blue halite colour centre aggregates studied by micro-Raman spectroscopy and X-ray diffraction

2012 ◽  
Vol 60 ◽  
pp. 124-128 ◽  
Author(s):  
Aleksandra Wesełucha-Birczyńska ◽  
Sylwia Zelek ◽  
Katarzyna Stadnicka
Keyword(s):  
Raman Spectroscopy ◽  
X Ray Diffraction ◽  
Colour Centre ◽  
X Ray ◽  
Micro Raman Spectroscopy
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