Length-Scale-Dependent Phase Transformation of LiFePO4: An In situ and Operando Study Using Micro-Raman Spectroscopy and XRD

ChemPhysChem ◽  
2015 ◽  
Vol 16 (11) ◽  
pp. 2383-2388 ◽  
Author(s):  
N. A. Siddique ◽  
Amir Salehi ◽  
Zi Wei ◽  
Dong Liu ◽  
Syed D. Sajjad ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Phase Transformation ◽  
Length Scale ◽  
Micro Raman Spectroscopy

Phase Transformation Related Conductivity Degradation of NiO Doped YSZ: An In-situ Micro-Raman Analysis

2012 ◽  
Vol 1385 ◽  
Author(s):  
Haruo Kishimoto ◽  
Keiji Yashiro ◽  
Taro Shimonosono ◽  
Manuel E. Brito ◽  
Katsuhiko Yamaji ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Phase Transformation ◽  
Analytical Techniques ◽  
Cubic Phase ◽  
Study Phase ◽  
Raman Analysis ◽  
Controlled Atmospheres ◽  
Micro Raman Spectroscopy ◽  
Reducing Atmosphere

ABSTRACTIn-situ micro Raman spectroscopy has been adopted as one of the most powerful analytical techniques with high spacial resolution under controlled atmospheres. In the present study, phase transformation of NiO doped yttria stabilized zirconia (YSZ) was monitored by in-situ micro-Raman spectroscopy. Raman spectra change caused by the phase transformation from the cubic phase to the tetragonal phase was observed for the NiO doped YSZ during annealing at a high temperature of 1173 K under reducing atmosphere.

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.

Enhanced yield strength in iron nanocomposite with in situ grown single-wall carbon nanotubes

2006 ◽  
Vol 21 (2) ◽  
pp. 522-528 ◽  
Author(s):  
A. Goyal ◽  
D.A. Wiegand ◽  
F.J. Owens ◽  
Z. Iqbal
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Yield Strength ◽  
Vapor Deposition ◽  
Single Wall Carbon Nanotubes ◽  
Iron Matrix ◽  
Single Wall Carbon ◽  
X Ray ◽  
Micro Raman Spectroscopy

The yield strength of iron-carbon nanotube composites fabricated by in situ chemical vapor deposition of 2.2 vol% single-wall carbon nanotubes (SWNTs) inside an iron matrix showed substantial enhancement up to 45%, relative to that of similarly treated pure iron samples without carbon nanotubes of the same piece density. The work hardening coefficient and the Vickers hardness coefficient also significantly increased in these composites relative to the reference samples. X-ray diffraction together with energy dispersive x-ray measurements and micro-Raman spectroscopy indicated no concomitant formation of carbides and very little amorphous carbon during the vapor deposition process. Micro-Raman spectroscopy and scanning and transmission electron microscopy showed spectral signatures and images, respectively, indicating the formation and dispersion of SWNTs within the cavities of the iron matrix. It is suggested that the increased strength of the nanocomposites was due to the mechanical support provided to these cavities by the extremely strong SWNTs.

Analysis of in situ water transport in Nafion® by confocal micro-Raman spectroscopy

2011 ◽  
Vol 196 (2) ◽  
pp. 652-658 ◽  
Author(s):  
Yuichiro Tabuchi ◽  
Rei Ito ◽  
Shohji Tsushima ◽  
Shuichiro Hirai
Keyword(s):  
Raman Spectroscopy ◽  
Water Transport ◽  
Micro Raman Spectroscopy
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