A Method for Lamping Atoms into Particles in Particle Dynamic Method

2011 ◽  
Vol 295-297 ◽  
pp. 1029-1037
Author(s):  
Jie Wei ◽  
Yu Feng Nie ◽  
Li Cai
Keyword(s):  
Crystal Structure ◽  
Mass Distribution ◽  
Topological Structure ◽  
Large Scale ◽  
Small Scale ◽  
Particle Dynamic ◽  
Face Centered Cubic ◽  
Cubic Crystal ◽  
Theoretical Support ◽  
Face Centered

Generalized particle dynamics method (GP) is a kind of new multi-scale analysis approach which relates various scales naturally through cohering small scale lattice to large-scale lattice. In this paper, a method named nearby condensation method is proposed to lump small scale lattice to large-scale lattice keeping topology structure and mass distribution. The method provides a theoretical support to the GP method. It is indicated that, after cohesion BCC (Body-Centered Cubic) crystal structure possessed the same topological structure and mass distribution, and FCC (Face-centered cubic) crystal structure possessed the same topological structure, but the mass distribution gradually converges to a steady state.

The Influence of the Synthesis Method on the Formation of Phase Composition and Catalytic Centers Gd2Zr2O7

2020 ◽  
Vol 1009 ◽  
pp. 69-74
Author(s):  
Ekaterina Borisovna Markova ◽  
Alexander Genrihovich Cherednichenko ◽  
V.V. Kurilkin ◽  
J.M. Serov
Keyword(s):  
Crystal Structure ◽  
Synthesis Method ◽  
Nanocrystalline Powders ◽  
Face Centered Cubic ◽  
Cubic Crystal ◽  
Wide Range ◽  
Physicochemical Methods ◽  
Degradation Reaction ◽  
Cubic Structure ◽  
Face Centered

The influence of the type of crystal structure of complex gadolinium oxides on their catalytic activity was studied using a wide range of physicochemical methods. It was shown that the synthesized nanocrystalline powders Gd2Zr2O7 form highly symmetric face-centered cubic crystal structures. In the course of catalytic experiments, it was found that the formation of a cubic structure increases the degree of conversion of propane and the shift of cracking temperatures to a lower area. The formation of various defects contributes to the course of the dehydrogenation or degradation reaction due to the different number of catalytic centers.

Electronic theory of binary alloys with face-centered-cubic crystal structure

1982 ◽  
Vol 26 (10) ◽  
pp. 5398-5402 ◽  
Author(s):  
F. Mejía-Lira ◽  
K. H. Bennemann ◽  
J. L. Morán-López
Keyword(s):  
Crystal Structure ◽  
Binary Alloys ◽  
Face Centered Cubic ◽  
Cubic Crystal ◽  
Electronic Theory ◽  
Face Centered

scholarly journals Synthesis and crystal structure of La21Cr8−2aAlbGe7−bC12[a= 0.22 (2) andb= 0.758 (19)]

2016 ◽  
Vol 72 (11) ◽  
pp. 1565-1568
Author(s):  
Jaskarun Pabla ◽  
Yuri Janssen ◽  
Jack W. Simonson
Keyword(s):  
Crystal Structure ◽  
Three Dimensional ◽  
Structure Type ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
Cubic Crystal ◽  
Synthesis And Crystal Structure ◽  
Geometrically Frustrated ◽  
The Face ◽  
Face Centered

Single crystals of a new multinary chromium carbide, La21Cr8−2aAlbGe7−bC12(henicosalanthanum octachromium aluminium hexagermanium dodecacarbide), were grown from an La-rich self flux and were characterized by single-crystal X-ray diffraction. The face-centered cubic crystal structure is composed of isolated and geometrically frustrated regular Cr tetrahedra that are co-centered within regular C octahedra. These mutually separated Cr4−aC6clusters are distributed throughout a three-dimensional framework of Al, Ge, and La. The title compound is isotypic with La21−δMn8X7C12andR21Fe8X7C12(R= La, Ce, Pr;X= Al, Bi, Ge, Sn, Sb, Te) and represents the first example of a Cr-based compound with this structure-type.

Study on Corrosion Resistance of High-Entropy Alloys NiCoCrFeMnCuC in Medium Acid Liquid

2011 ◽  
Vol 117-119 ◽  
pp. 1816-1819 ◽  
Author(s):  
Ze Liu ◽  
Jian Min Zeng ◽  
Hai Hong Zhan
Keyword(s):  
Crystal Structure ◽  
Corrosion Resistance ◽  
High Entropy Alloy ◽  
Face Centered Cubic ◽  
Arc Furnace ◽  
Cubic Crystal ◽  
High Entropy ◽  
Excellent Corrosion Resistance ◽  
Face Centered ◽  
Loss Experiment

High-entropy alloy of NiCoCrFeMnCuC were made by vacuum non-consumable arc furnace in the present work. The crystal structure of NiCoCrFeMnCuC was analyzed by XRD. The corrosion resistance of NiCoCrFeMnCuC in 10%HNO3-3%HF, 10%H2SO4, 5%HCl and 10%HF was investigated, respectively with weight loss experiment. The results show that main intermetallics of the alloy are CoCx, FeNi3 and Fe3Mn7. The NiCoCrFeMnCuC has simple crystal structures with face-centered cubic crystal structure FCC and Quartet and has excellent corrosion resistance in some medium acid liquids.

Microstructure Characterization of Ag Nanoparticles Prepared by Hydrothermal Method

2012 ◽  
Vol 476-478 ◽  
pp. 1138-1141
Author(s):  
Zhi Qiang Wei ◽  
Qiang Wei ◽  
Li Gang Liu ◽  
Hua Yang ◽  
Xiao Juan Wu
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Hydrothermal Method ◽  
Ag Nanoparticles ◽  
Average Particle Size ◽  
Average Particle ◽  
Face Centered Cubic ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Face Centered

Ag nanoparticles were successfully synthesized by hydrothermal method under the polyol system combined with traces of sodium chloride, Silver nitrate(AgNO3) and polyvinylpyrrolidone (PVP) acted as the silver source and dispersant respectively. The samples by this process were characterized via X-ray powder diffraction (XRD), Brunauer–Emmett–Teller (BET) adsorption equation, transmission electron microscopy (TEM) and the corresponding selected area electron diffraction (SAED) to determine the chemical composition, particle size, crystal structure and morphology. The experiment results indicate that the crystal structure of the samples is face centered cubic (FCC) structure as same as the bulk materials, The specific surface area is 24 m2/g, the particle size distribution ranging from10 to 50 nm, with an average particle size about 26 nm obtained by TEM and confirmed by XRD and BET results.

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