Plutonium Pyrochemical Salts Oxidation Using Vanadium Oxide

1998 ◽  
Vol 547 ◽  
Author(s):  
Donna M. Smith ◽  
Mary P. Neu ◽  
Eduardo Garcia ◽  
Vonda R. Dole
Keyword(s):  
Vanadium Oxide ◽  
Xrd Analysis ◽  
Powder Xrd ◽  
Powder Xrd Analysis ◽  
Salt Matrix

AbstractThis paper presents results from the oxidation of PuCl3 with two-thirds, one, and two equivalents of V2O5 and the oxidation of Pu° with two and three equivalents of V2O5. All of the PuCl3 reactions were successful in that little or no starting materials remained and the major plutonium reaction product was PuO2. There is no evidence that V is reduced to V(II) or V°. According to powder XRD analysis, the bottom layers of all three reactions are identical, the middle layers contain different phases, and phases in the top layer of the oxidation with one equivalent of V2O5 is contained in the top layer from the oxidation with two-thirds equivalent of V2O5. The Pu° oxidations are more complex than the PuCl3 oxidations. More unreacted Pu° remains in the reaction using three equivalents of V2O5 than the reaction using two equivalents of V2O5. The lack of predictability of these reactions may be a result of the source of Pu° used in our experiments. The presence of soluble Pu(III) and the relative absence of PuO2 in all the Pu° reactions suggests V2O5 does not oxidize Pu° to Pu(IV) under these conditions. Chlorine is detected in the off-gas of the Pu° oxidations, indicating the salt matrix participates in the reaction.

scholarly journals Complex of Tris(Phenanthroline)Cobalt(II)Trifluoroacetate: Characterisation and Powder XRD Analysis

2019 ◽  
Vol 35 (5) ◽  
pp. 1500-1507
Author(s):  
Isana Supiah Yosephine Louise ◽  
Savetsilla Nabila ◽  
Kristian Handoyo Sugiyarto
Keyword(s):  
Aqueous Solution ◽  
Xrd Analysis ◽  
Electronic Configuration ◽  
Powder Xrd ◽  
Main Mode ◽  
Orbital Contribution ◽  
Triclinic Crystal System ◽  
Infrared Spectral ◽  
Powder Xrd Analysis ◽  
Sodium Trifluoroacetate

The powder complex of tris(phenanthroline)cobalt(II) trifluoroacetate (TFA) has been prepared by interaction of cobalt(II) nitrate, phenanthroline (phen) in aqueous solution with drops of ethanol, and an excess of saturated aqueous solution of sodium trifluoroacetate, whereupon the yellowish powder was produced. AAS measurment for the metal content, equivalent conductance (1:2), and TGA-DTA of the powder suggest the corresponding formula of [Co(phen)3](TFA)2.5H2O. The efffective magnetic moment of 4.9 BM indicates the high-spin nature of this complex which corresponds to three unpaired electrons in the electronic configuration of Co(II) with significantly higher than the spin only value due to the orbital contribution. UV-Vis spectrum of the complex reveals the d-d spin-allowed transition bands as well as the MLCT and intraligand band. The estimating transition energy ratio of 2.04 for ν2/ν1, is clearly in the range for octahedral configuration. The infrared spectral property indicates the main mode of vibrations for the functional groups of ligand phen and TFA, and thus supports strongly the formula proposed for this complex. The corresponding powder XRD was then refined using Rietica-Le Bail method and found to be fit as triclinic crystal system with space group of PĪ.

SYNTHESIS AND CHARACTERISATION OF Ba5Cu3Oy

1996 ◽  
Vol 10 (01n02) ◽  
pp. 29-30
Author(s):  
L.K. KALIYAPERUMAL ◽  
K. JEYABALAN
Keyword(s):  
Xrd Analysis ◽  
Lattice Parameters ◽  
Powder Xrd ◽  
Orthorhombic Structure ◽  
Powder Xrd Analysis

Synthesis and characterisation of Ba 5 Cu 3 O y compound is reported here. Powder XRD analysis shows that the system belongs to orthorhombic structure and the lattice parameters are a=8.664(8) Å, b=8.931(2) Å, c=9.072(9) Å.

scholarly journals Reusable Nanocatalyst: Zirconia and Sulfated Zirconia

2014 ◽  
Vol 36 ◽  
pp. 295-302
Author(s):  
Mitesh B. Gondaliya ◽  
Tushar Maheta ◽  
Mayank J. Mamtora ◽  
Manish K. Shah
Keyword(s):  
Sulfated Zirconia ◽  
Catalytic Amount ◽  
Xrd Analysis ◽  
Solvent Free ◽  
Powder Xrd ◽  
Microwave Method ◽  
Solvent Free Conditions ◽  
Powder Xrd Analysis ◽  
Ft Ir

1,5-benzodiazepines have been synthesized by Nano Zirconia and Nano Sulfated Zirconia in solvent free conditions. Synthesis was carried out by conventional as well as microwave method. Benzodiazepines were synthesized by reacting o-phenylenediamine and few ketones in the presence of catalytic amount of Nanoparticles. Particles used were sized in between 53-100 nm. Nanoparticles were characterized by FT-IR, DLS and powder XRD analysis.

Powder XRD analysis and catalysis characterization of ultra-small gold nanoparticles deposited on titania-modified SBA-15

2005 ◽  
Vol 6 (6) ◽  
pp. 404-408 ◽  
Author(s):  
Wenfu Yan ◽  
Valeri Petkov ◽  
Shannon M. Mahurin ◽  
Steven H. Overbury ◽  
Sheng Dai
Keyword(s):  
Gold Nanoparticles ◽  
Xrd Analysis ◽  
Powder Xrd ◽  
Powder Xrd Analysis

Influence of Vanadium on Cement Properties and Leaching Analysis

2015 ◽  
Vol 1103 ◽  
pp. 113-119
Author(s):  
Suthatip Sinyoung ◽  
Puangrat Kajitvichyanukul
Keyword(s):  
Vanadium Oxide ◽  
Xrd Analysis ◽  
Cement Industry ◽  
Industrial Wastes ◽  
Raw Material ◽  
Renewable Energy Resources ◽  
Free Lime ◽  
X Ray ◽  
Used Oil ◽  
Us Epa

Nowadays, industrial wastes are widely used as an alternative fuel or raw material in the cement industry owing to the advantage of waste removal and gaining economic incomes from preserving non-renewable energy resources. In the present work, the effect of the addition of small amounts of vanadium in the clinkering process of cement mortar was studied. Vanadium was chosen to study as it is present in the coke commonly burned as fuel and in industrial wastes such as used oil which is used as alternative secondary fuel in cement kilns. The study simulated the burning process in a chamber furnace. Raw meal was burned with vanadium oxide (V2O5) in four concentrations from 0.01 to 1% by weight. The resulting clinker was analysed for the content of free lime and X-ray diffraction (XRD) analysis was done. These samples were also analysed by scanning electron microscope (SEM) connected with an energy-dispersive X-ray-spectrometer (EDS) to detect the composition of the clinker phase. The results show that only very high intakes of vanadium oxide higher than 0.5% by weight have measurable effects on the formation and composition of the clinker. Amounts of C3S and C2S were decreased with high intakes of vanadium. To study the leaching behavior, the microwave-assisted leach method 3051A. Result showed that vanadium was likely to be leached from cement that 15-20% of them can be leached to the environment. In case, TCLP (US EPA) test the result showed that raw material doped with vanadium up to 1 wt.%, the cement was not classified as hazardous waste.

FT-IR Spectroscopic and XRD Studies on Tris-Thiourea Strontium Chloride Single Crystals

2011 ◽  
Vol 8 (1) ◽  
pp. 201-204
Author(s):  
H. O. Jethva ◽  
R. R. Hajiyani
Keyword(s):  
Single Crystals ◽  
Xrd Analysis ◽  
Wave Number ◽  
Strontium Chloride ◽  
Orthorhombic Crystal ◽  
Orthorhombic Crystal Structure ◽  
Number Range ◽  
Aqueous Solvent ◽  
Powder Xrd Analysis ◽  
Ft Ir

There are various nonlinear optical materials having crystalline nature and find various applications in science and technology. Tris-thiourea strontium chloride was synthesized and single crystals were grown by the slow solvent evaporation technique using aqueous solvent. The grown crystals were characterized by Fourier Transform Infrared Spectroscopy (FT-IR), and X-ray diffraction analysis (XRD). The FT-IR spectra of these crystals were recorded in the wave number range 400-4000 cm-1 which reveals the presence of various functional groups. The powder XRD analysis suggested orthorhombic crystal structure.

scholarly journals Silver-calcium-borates as better replacement for conventional organic antimicrobials in cosmetic products

2022 ◽  
Vol 11 (1) ◽  
pp. 113-120 ◽  
Author(s):  
A.L. Arunachalam ◽  
S. Induja ◽  
V. Parthasarathy ◽  
P.S. Raghavan
Keyword(s):  
Antibacterial Agents ◽  
Antimicrobial Agents ◽  
Xrd Analysis ◽  
New Drugs ◽  
The Novel ◽  
Cosmetic Products ◽  
Bacterial Reduction ◽  
Phase Purity ◽  
Powder Xrd Analysis ◽  
Antibacterial And Antifungal

Microbes generally develop resistance towards organic antibacterial agents like ampicillin, Sulfonamides, methicillin, etc., and progressively new drugs are being invented to replace them. Hence, replacement of organic antibacterial agents with inorganic analogues requires constant research and the present investigation reports alternatives for conventional antimicrobial agents like methylparaben, diazolidinyl urea, etc., in the cosmetic products with silver incorporated calcium borates. The chemically synthesized silver-calcium borates have been analyzed for phase purity using powder XRD analysis, nature of bonding using FTIR vibrations, and morphology using SEM. The antibacterial and antifungal studies were carried out for the novel inorganic silver-calcium borates incorporated cosmetic products. The products were also subjected to thermal & photostability studies and found to be comparable with that of commercially available products. A minimum quantity of 3 ppm of silver-calcium borate concentration was required to bring about nearly 100% bacterial reduction in the cosmetic products.

Investigation of Low Temperature Sintering of Low Voltage Varistor Based on TiO2

2014 ◽  
Vol 852 ◽  
pp. 12-16 ◽  
Author(s):  
De Jun Lan ◽  
Shu Quan Wan
Keyword(s):  
Dielectric Constant ◽  
Low Temperature ◽  
Room Temperature ◽  
Low Voltage ◽  
Structural Characteristics ◽  
Nonlinear Coefficient ◽  
Xrd Analysis ◽  
Low Temperature Sintering ◽  
Powder Xrd Analysis ◽  
Room Temperature Dielectric Constant

Low temperature sintering of TiO2-base varistor was systematically investigated through doing with V2O5 and B-Si glass. Pellets prepared could be densely sintered from 1273 to 1473K. The highest relative density, 94.6%, was found in the sample sintered at 1433K. According to I-V plots of ceramic pellets, the nonlinear coefficient α and breakdown voltage V1mA were obtained and found to be α=2~5 and V1mA=15~30V. The room temperature dielectric constant was very large, high as to about 20000. Powder XRD analysis has shown the desirable macro-structural characteristics of these compacts.

scholarly journals Using Fly Ash Wastes for the Development of New Building Materials with Improved Compressive Strength

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 644
Author(s):  
Maria Harja ◽  
Carmen Teodosiu ◽  
Dorina Nicolina Isopescu ◽  
Osman Gencel ◽  
Doina Lutic ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Building Materials ◽  
Simple Procedure ◽  
Xrd Analysis ◽  
Partial Hydrolysis ◽  
Alkali Activation ◽  
Activation Process ◽  
Solid Ratio ◽  
Powder Xrd Analysis

Fly ash wastes (silica, aluminum and iron-rich materials) could be smartly valorized by their incorporation in concrete formulation, partly replacing the cement. The necessary binding properties can be accomplished by a simple procedure: an alkali activation process, involving partial hydrolysis, followed by gel formation and polycondensation. The correlations between the experimental fly ash processing conditions, particle characteristics (size and morphology) and the compressive strength values of the concrete prepared using this material were investigated by performing a parametric optimization study to deduce the optimal processing set of conditions. The alkali activation procedure included the variation of the NaOH solutions concentration (8–12 M), temperature values (25–65 °C) and the liquid/solid ratio (1–3). The activation led to important modifications of the crystallography of the samples (shown by powder XRD analysis), their morphologies (seen by SEM), particle size distribution and Blaine surface values. The values of the compressive strength of concrete prepared using fly ash derivatives were between 16.8–22.6 MPa. Thus, the processed fly ash qualifies as a proper potential building material, solving disposal-associated problems, as well as saving significant amounts of cement consumed in concrete formulation.

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