"investigation on determination of tungsten in spongy"

A computational-experimental investigation on high ...

2019-12-24 · The DFT investigation exposed that the WO 5 /ZrO 2 single-support catalyst is suitable to represent to the tungsten on catalysts due to the agreement of bond length between W and O …

Spectroscopic Investigations of Tungsten in the EUV …

Author: Asmussen, K. et al.; Genre: Journal Article; Published in Print: 1998; Title: Spectroscopic Investigations of Tungsten in the EUV Region and the Determination of its Concentration in Tokamaks

Sticking Probabilities, Heats of Adsorption and ...

A kinetic investigation has been made of the interaction of nitrogen with evaporated films of tungsten prepared under ultra-high vacuum conditions. A technique is described for the accurate determination of the sticking probability of gases on metal films; the value for a clean film at 290 ^circK (0.75) is higher than values reported for filaments or sheets, which have relatively smooth ...

Thermal Properties of Tungsten SRM''S 730 and 799 | J. …

Samples of sintered and arc-cast tungsten are available from NBS as thermal conductivity (SRM 730) and electrical resistivity (SRM 799) standards for the temperature range from 4 to 3000K. NBS recommended values for these properties above room temperature are based on results of various researchers during a previous international program which ...

UNITED STATES INTERNATIONAL TRADE COMMISSION …

2014-1-10 · tungsten metallization and products containing same investigation no. 337-ta-648 notice of a commission determination not to review an initial determination terminating the investigation as to freescale semiconductor, inc. agency: u.s. international trade commission. action: notice.

Structural Determination of Bulk and Surface Tungsten ...

2013-7-26 · tungsten oxide samples: xWSupport, where x is the surface density (W-atoms/nm2) and Support is the support (i.e., 4.5WZr represents a surface density of 4.5 W/nm2 for the supported WO3/ZrO2 catalyst). Surface tungsten oxide coverage and loading for the supported WO3 catalysts are found in Table 2. Raman Spectroscopy. Raman spectroscopy was used to

Investigation on the photophysical properties of tungsten ...

2018-4-5 · Tungsten trioxide (WO 3), Metal tungstates (SrWO 4, Cr 2 WO 6), WO 3 /SrWO 4 and WO 3 /Cr 2 WO 6 nanocomposites were successfully prepared by microwave irradiation method at relatively low temperature (500 °C). The synthesized samples were subjected to different investigation techniques, to know the materials physical and chemical properties.

Investigation into the spontaneous dissolution of tungsten ...

An acid-decomposition method, using hydrofluoric and nitric acids, was found to require no external heat source to dissolve tungsten wire. This spontaneous decomposition method was compared with an established method based on hydrogen peroxide as the dissolution medium. The determination of trace elements (potassiu

Investigation on tool wear and tool life prediction in ...

2020-12-23 · In this study, standard procedures and conditions set by the ISO for tool life testing in milling were used to analyze the wear of tungsten carbide micro-end-milling tools through slot milling conducted on titanium alloy Ti-6Al-4V.

ZHAO Ming-

2021-9-9 · 6.Yaowei Wei, Daming Zhuang, Ming Zhao, Qianming Gong, Rujun Sun, Guoan Ren, Yixuan Wu, Leng Zhang, Xunyan Lyu, Xiao Peng, "An investigation on phase transition for as-sputtered Cu2ZnSnSe4 absorbers during selenization", Solar Energy 164: 58-64

Extraction-spectrophotometry determination of tungsten ...

Determination of tungsten in spongy zirconium by zinc-bithionol-chloroform extracting spectrophotometric method was investigated in detail, including the synthetic process of zinc-bithionol, and ...

Investigation of optical and device parameters of ...

2017-10-10 · Hot injection synthesis route has been successfully applied for the preparation of high quality Cu2WSe4 (CWSe) nanosheets in order to determine their optical characterization and device parameters. Several techniques including XRD, SEM, TEM and SAED were used to characterize these nanosheets. These techniques confirmed that Cu2WSe4 nanosheets crystal shapes of synthesized …

Thermal Expansion of Tungsten

2012-11-14 · S515 THERMALEXPANSIONOFTUNGSTEN ByPeterHidnertandW.T.Sweeney ABSTRACT Thispapergivestheresultsofaninvestigationonthethermalexpansionof tungsten(99.98percent ...

Spectroscopic investigations of tungsten in the EUV region ...

Autor: Asmussen, K. et al.; Genre: Zeitschriftenartikel; Im Druck veröffentlicht: 1998; Titel: Spectroscopic investigations of tungsten in the EUV region and the determination of its concentration in tokamaks

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Investigation on electrochemical behaviors of MnCl2 ...

2021-4-21 · In this work, electrochemical behaviors of Mn(II) in LiCl-KCl melts were investigated at 723 K using cyclic voltammetry (CV), chronopotentiometry (CP) chronoamperometry (CA), and square wave voltammetry (SWV) techniques. Results from CV and SWV measurements show that the redox reaction of Mn(II) on a tungsten working electrode is a diffusion controlled quasi-reversible reaction with two ...

Activation Analysis of Trace Impurities in Tungsten Using ...

2002-5-1 · Determination of U and Th in tungsten by radiochemical neutron activation analysis. Journal of Radioanalytical and Nuclear Chemistry Articles 1992, 160 (2), 539-548. DOI: 10.1007/BF02037129. R. Caletka, R. Hausbeck, V. Krivan. Radiochemical multielement neutron activation analysis of tungsten.

Redox control on the tungsten isotope composition of ...

2021-5-4 · The fate and transport of tungsten (W) in aquatic environments is still poorly constrained. To identify the processes that control the abundance of dissolved W, we applied a sophisticated analytical approach that enables the accurate determination of the seawater W isotopic composition. Our results indicate that the removal of W from seawater mainly occurs via adsorption onto oxide minerals.

Determination of Tungsten in Iron and Steel. I ...

Determination of Tungsten in Iron and Steel. I ...

Determination of Tungsten in Iron and Steel. I ...

2020-3-6 · Determination of Tungsten in Iron and Steel. I: Investigations on the Perchloric Acid Method GOTO Hidehiro, KAKITA Yachiyo journal or publication title Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy volume 2 page range 732-740

Determination of Tungsten in Iron and Steel. I : …

The conditions for the determination of tungsten in iron and steel have been studied by the use of perchloric acid. Tungsten can be precipitated quantitatively with a single fuming of perchloric acid by the following treatment : the sample is dissolved in aqua regia and evaporated to the white fume after an addition of 50 ml of perchloric acid ; after cooling, 30 ml of 6N ...

Spectroscopic Investigations of Tungsten in the EUV …

Released Journal Article Spectroscopic Investigations of Tungsten in the EUV Region and the Determination of its Concentration in Tokamaks

Tungsten-deuterium co-deposition: Experiment and ...

2018-3-1 · In this paper, experimental results on tungsten-deuterium co-deposition in a wide range of substrate temperatures are described, and a simple analytical model of co-deposition is proposed. 2. Experimental details. The installation MD-2 used to study gas co …

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:903. :010-62332189. Email:[email protected] . :. 20059-20097,,. 20099-20147,、、,. 20147,, ...

2020-8-27 · . . Associate Prof. GAO Zhi. Email: [email protected] .cn. 、,,,、、 ...

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2021-9-9 · "Investigation on Sb-doped induced grain growth and mechanisms of Cu(InGa)Se2 films by sputtering process with Se-free annealing." Solar Energy 2017, 157: 1074–1081 [4] Leng Zhang, Daming Zhuang*, Ming Zhao*, Qianming Gong, Li Guo, Liangqi Ouyang, Rujun Sun, Yaowei Wei, Shilu Zhan, Xunyan Lyu, Xiao Peng.

Experimental Study of Stiffness and Nonuniformity in the ...

An experimental investigation has been made of the effect of stiffness and nonuniformity in filaments on the vibroscopic determination of linear density. For the samples studied (tungsten wire, wool fibers, nylon filaments) the effect of damping and of support motion was ordinarily negligible.

Review on tungsten trioxide as a photocatalysts for ...

2021-8-1 · Due to the vital role of electronic structure in photocatalytic performance, some investigations have specified approaches for improvement of the photocatalytic performance. Tungsten trioxide (WO 3,WO 3−x ·nH 2 O (x < 1, n = 0–2) is dependent on their stoichiometry, crystalline structure, and defect density (Girish Kumar and Rao, 2015c).

A SPECTROCHEMICAL METHOD FOR DETERMINATION …

2015-10-2 · of the spectral lines in the line-rich tungsten spectrum. Special line cards were prepared for each impurity element under investigation. The cards were obtained by comparison of the spectrum of Johnson-Mat they specpure tungsten oxide with the spectrum of …

(PDF) Spectroscopic investigations of Tungsten in the EUV ...

Tungsten was injected by means of laser ablation in both ohmic and additionally heated plasmas of the ASDEX Upgrade tokamak experiment. Spectroscopic investigations were performed in the extreme ...

Determination of Coordination Form of Tungsten Ion in ...

2021-7-27 · The developed simulation boxes can serve as a verification for further theoretical investigations of the coordination form of tungsten ion groups at molecular scale. The results of this work provide necessary knowledge for the development methods to determine the dynamics and thermodynamic properties and coordination forms of metal ions.

Investigation on electrochemical behaviors of MgCl2 ...

2021-4-1 · CV curves obtained before and after the addition of MgCl 2 (1.5 wt%) on a tungsten electrode at 673 K was presented in Fig. 1.The black line in Fig. 1 showed the CV curve of blank LiCl-KCl melt, peak C and C'' corresponded to the deposition and dissolution of Li metal, respectively. The red one represented the CV curve achieved in the molten system containing MgCl 2.

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2011-10-27 · An experimental investigation of the influence of cutting parameters on cutting temperature in milling Ti6Al4V by applying semi-artificial thermocouple[J]. The International Journal of Advanced Manufacturing Technology, 2014, 70(5-8): 765-773.

Spectroscopic Investigation of Metal Content in Prestrike ...

Determination of contacts surface evaporation by optical emission spectroscopy is one of the most precise methods to investigate the prestrike arc interface with the contacts. In this article, the temporal and spatial profiles of copper and tungsten emitted species during prestrike arc are presented.

An Investigation on High-Resolution Temperature ...

This investigation aims to validate the simulation and the material model generated in the SFB TRR with a highly local temperature measurement as near to the machining zone as possible. The generated heat of the comparably small process is expected to only generate high temperatures locally, as seen in [ 5 ].