scholarly journals The chromium oxide and the vanadium oxide band spectra

1932 ◽  
Vol 8 (3) ◽  
pp. 381 ◽  
Author(s):  
W.F.C. Ferguson
Keyword(s):  
Vanadium Oxide ◽  
Chromium Oxide ◽  
Band Spectra

Novel SiO2-Supported Chromium Oxide(Cr)/Vanadium Oxide(V) Bimetallic Catalysts for Production of Bimodal Polyethylene

2015 ◽  
Vol 9 (5) ◽  
pp. 462-472 ◽  
Author(s):  
Ruihua Cheng ◽  
Xin Xue ◽  
Weiwei Liu ◽  
Ning Zhao ◽  
Xuelian He ◽  
...  
Keyword(s):  
Vanadium Oxide ◽  
Chromium Oxide ◽  
Bimetallic Catalysts ◽  
Bimodal Polyethylene

Catalytic Reduction of Nitric Oxide with Ammonia on Vanadium Oxide and Iron-Chromium Oxide

Product R&D ◽  
1975 ◽  
Vol 14 (4) ◽  
pp. 268-273 ◽  
Author(s):  
George L. Bauerle ◽  
S. C. Wu ◽  
Ken Nobe
Keyword(s):  
Nitric Oxide ◽  
Vanadium Oxide ◽  
Chromium Oxide ◽  
Catalytic Reduction ◽  
Iron Chromium

Magnetic Properties of Chromium Oxide Modified by Vanadium Oxide

1961 ◽  
Vol 16 (11) ◽  
pp. 2340-2341 ◽  
Author(s):  
Buichi Kubota ◽  
Tomozo Nishikawa ◽  
Akira Yanase
Keyword(s):  
Magnetic Properties ◽  
Vanadium Oxide ◽  
Chromium Oxide

The spalling of chromium oxide on an FeCr alloy

1966 ◽  
Vol 6 (11-12) ◽  
pp. 549-550 ◽  
Author(s):  
V HOWES
Keyword(s):  
Chromium Oxide ◽  
Fecr Alloy

HIGH PRESSURE OXYGEN A-BAND SPECTRA

2015 ◽  
Author(s):  
Brian Drouin ◽  
Jiajun Hoo ◽  
V. Devi ◽  
D. Benner ◽  
David Robichaud ◽  
...  
Keyword(s):  
High Pressure ◽  
Pressure Oxygen ◽  
High Pressure Oxygen ◽  
Band Spectra

Study of the microstructure and particles of vanadium (III) oxide, vanadium (V) oxide and lithium aluminate powders

2020 ◽  
Vol 86 (1) ◽  
pp. 32-37
Author(s):  
Valeria A. Brodskaya ◽  
Oksana A. Molkova ◽  
Kira B. Zhogova ◽  
Inga V. Astakhova
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Vanadium Oxide ◽  
Size Distribution ◽  
Microstructural Analysis ◽  
Coherent Scattering ◽  
Powder Materials ◽  
Lithium Aluminate ◽  
Range Limit ◽  
Oxide Particles

Powder materials are widely used in the manufacture of electrochemical elements of thermal chemical sources of current. Electrochemical behavior of the powders depends on the shape and size of their particles. The results of the study of the microstructure and particles of the powders of vanadium (III), (V) oxides and lithium aluminate obtained by transmission electron and atomic force microscopy, X-ray diffraction and gas adsorption analyses are presented. It is found that the sizes of vanadium (III) and vanadium (V) oxide particles range within 70 – 600 and 40 – 350 nm, respectively. The size of the coherent-scattering regions of the vanadium oxide particles lies in the lower range limit which can be attributed to small size of the structural elements (crystallites). An average volumetric-surface diameter calculated on the basis of the surface specific area is close to the upper range limit which can be explained by the partial agglomeration of the powder particles. Unlike the vanadium oxide particles, the range of the particle size distribution of the lithium aluminate powder is narrower — 50 – 110 nm. The values of crystallite sizes are close to the maximum of the particle size distribution. Microstructural analysis showed that the particles in the samples of vanadium oxides have a rounded (V2O3) or elongated (V2O5) shape; whereas the particles of lithium aluminate powder exhibit lamellar structure. At the same time, for different batches of the same material, the particle size distribution is similar, which indicates the reproducibility of the technologies for their manufacture. The data obtained can be used to control the constancy of the particle size distribution of powder materials.

Chemical deposition of hard composite coatings Ni–Cu–P–Cr2O3

2020 ◽  
pp. 179-181
Author(s):  
A.A. Abrashov A.A. ◽  
E.G. Vinokurov ◽  
M.A. Egupova ◽  
V.D. Skopintsev
Keyword(s):  
Chromium Oxide ◽  
Alkaline Solution ◽  
Composite Coatings ◽  
Chemical Deposition ◽  
Alkaline Solutions ◽  
Functional Surface ◽  
Heat Treated ◽  
Weakly Acid Solution ◽  
Coating Composition ◽  
Weakly Acidic Solution

The technological (deposition rate, coating composition) and functional (surface roughness, microhardness) characteristics of chemical composite coatings Ni—Cu—P—Cr2O3 obtained from weakly acidic and slightly alkaline solutions are compared. It is shown that coatings deposited from slightly alkaline solution contain slightly less phosphorus and chromium oxide than coatings deposited from weakly acid solution (2...3 % wt. phosphorus and up to 3.4 % wt. chromium oxide), formed at higher rate (24...25 microns per 1 hour of deposition at temperature of 80 °C), are characte rized by lower roughness and increased microhardness. The Vickers microhardness at 0.05 N load of composite coatings obtained from slightly alkaline solution and heat-treated at 400 °C for 1 hour is 13.5...15.2 GPa, which is higher than values for coatings deposited made of weakly acidic solution. The maximum microhardness of coatings is achieved at concentration 20 g/l of Cr2O3 particles. The technology of chemical deposition of Ni—Cu—P—Cr2O3 coatings formed in slightly alkaline solution is promising for obtaining of materials with increased hardness and wear resistance.

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