Density Characterization of Mixed Oxides of Nitrogen from Freezing Point to 50°C

2020 ◽  
Author(s):  
Alicia Benhidjeb-Carayon ◽  
Yash Pande ◽  
Benjamin E. Whitehead ◽  
Jason R. Gabl ◽  
Timothee L. Pourpoint
Keyword(s):  
Mixed Oxides ◽  
Freezing Point ◽  
Oxides Of Nitrogen

Correction: Small Batch Synthesis of Mixed Oxides of Nitrogen

2020 ◽  
Author(s):  
Philip M. Piper ◽  
Taylor B. Groom ◽  
Jeremy W. Marcum ◽  
Timothee L. Pourpoint
Keyword(s):  
Mixed Oxides ◽  
Oxides Of Nitrogen

Microstructure Characterization of Metal Mixed Oxides

MRS Advances ◽  
2017 ◽  
Vol 2 (64) ◽  
pp. 4025-4030 ◽  
Author(s):  
T. Kryshtab ◽  
H. A. Calderon ◽  
A. Kryvko
Keyword(s):  
Mixed Oxides ◽  
Profile Analysis ◽  
Atomic Resolution ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Reconstruction Procedure ◽  
Transmission Electron ◽  
Xrd Patterns ◽  
Co Precipitation

ABSTRACTThe microstructure of Ni-Mg-Al mixed oxides obtained by thermal decomposition of hydrotalcite-like compounds synthesized by a co-precipitation method has been studied by using X-ray diffraction (XRD) and atomic resolution transmission electron microscopy (TEM). XRD patterns revealed the formation of NixMg1-xO (x=0÷1), α-Al2O3 and traces of MgAl2O4 and NiAl2O4 phases. The peaks profile analysis indicated a small grain size, microdeformations and partial overlapping of peaks due to phases with different, but similar interplanar spacings. The microdeformations point out the presence of dislocations and the peaks shift associated with the presence of excess vacancies. The use of atomic resolution TEM made it possible to identify the phases, directly observe dislocations and demonstrate the vacancies excess. Atomic resolution TEM is achieved by applying an Exit Wave Reconstruction procedure with 40 low dose images taken at different defocus. The current results suggest that vacancies of metals are predominant in MgO (NiO) crystals and that vacancies of Oxygen are predominant in Al2O3 crystals.

scholarly journals Synthesis and Characterization of K-Ta Mixed Oxides for Hydrogen Generation in Photocatalysis

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Beata Zielińska ◽  
Ewa Mijowska ◽  
Ryszard J. Kalenczuk
Keyword(s):  
Diffuse Reflectance ◽  
Hydrogen Generation ◽  
Mixed Oxides ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman Spectroscopic ◽  
Photocatalytic Hydrogen Generation ◽  
Irregular Structure ◽  
Transmission Electron

K-Ta mixed oxides photocatalysts have been prepared by impregnation followed by calcination. The influence of the reaction temperature (450°C–900°C) on the phase formation, crystal morphology, and photocatalytic activity in hydrogen generation of the produced materials was investigated. The detailed analysis has revealed that all products exhibit high crystallinity and irregular structure. Moreover, two different crystal structures of potassium tantalates such as KTaO3and K2Ta4O11were obtained. It was also found that the sample composed of KTaO3and traces of unreacted Ta2O5(annealed at 600°C) exhibits the highest activity in the reaction of photocatalytic hydrogen generation. The crystallographic phases, optical and vibronic properties were examined by X-ray diffraction (XRD) and diffuse reflectance (DR) UV-vis and resonance Raman spectroscopic methods, respectively. Morphology and chemical composition of the produced samples were studied using a high-resolution transmission electron microscope (HR-TEM) and an energy dispersive X-ray spectrometer (EDX) as its mode.

ChemInform Abstract: Synthesis and Characterization of the New Mixed Oxides M(VTe)O6 (M: K, Rb, or Cs).

ChemInform ◽  
1988 ◽  
Vol 19 (45) ◽  
Author(s):  
S. GARCIA-MARTIN ◽  
M. L. VEIGA ◽  
A. JEREZ ◽  
M. GAITAN ◽  
C. PICO
Keyword(s):  
Mixed Oxides ◽  
Synthesis And Characterization

Synthesis and characterization of anthill-eggshell-Ni-Co mixed oxides composite catalyst for biodiesel production from waste frying oil

2018 ◽  
Vol 13 (1) ◽  
pp. 37-47 ◽  
Author(s):  
Adeyinka S. Yusuff ◽  
Olalekan D. Adeniyi ◽  
Sarafa O. Azeez ◽  
Moses A. Olutoye ◽  
Uduak G. Akpan
Keyword(s):  
Mixed Oxides ◽  
Frying Oil ◽  
Biodiesel Production ◽  
Synthesis And Characterization ◽  
Composite Catalyst ◽  
Waste Frying Oil

Latest developments for microstructural and chemical characterization of diffusion bonding in superplastic 8090 Al–Li alloys

1996 ◽  
Vol 11 (1) ◽  
pp. 63-71 ◽  
Author(s):  
A. Ureña ◽  
J. M. Gómez de Salazar ◽  
J. J. Martín ◽  
J. Quiñones
Keyword(s):  
Surface Characterization ◽  
Secondary Ion Mass Spectrometry ◽  
Mixed Oxides ◽  
Chemical Characterization ◽  
Bond Line ◽  
Force Microscopy ◽  
Atomic Force ◽  
Bond Interface ◽  
Secondary Ion

This paper describes a new application of two complementary surface characterization techniques to study solid-state bonding in an Al–Li alloy. Through the two mentioned techniques, Atomic Force Microscopy (AFM) and Secondary Ion Mass Spectrometry (SIMS), important findings about what takes place in the bond interface have been determined. These findings enclose both the formation of discontinuous mixed oxides and the evolution of Li through the bond line and into theadjacent diffusion affected zones. Homogenization of Li and Cu alloyelements has been detected even in those cases where a metallic interlayer was used to favor the union.

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