Nickel foils

The submitters used a cathode of nickel foil (140 x 71 x 0.5 mm.) rolled into a cylinder 3.5 cm. in diameter surrounded by three curved platinum anodes each having the dimensions 70 x 30 x 1 mm. (total surface area 130 cm. ) with a distance of 0.5-1 cm. between the cathode and the anodes. The submitters electrolyzed for 6 hours at a current maintained at 3.25 amp. This corresponds to a total of 19.5 amp.-hours and an anodic current density of 0.025 amp./cm.Under these conditions the submitters report yields of 81-84%. 

Jfickeloxydul, n. nickelous oxide, nickel(II) oxide, NiO. -hydrat, n, nickelous hydroxide, nickel (II) hydroxide, -salz, n. nickelous salt, nickel(II) salt, -verbindung,/. nickelous compound, nickel(II) compound. Nickelpapier, n. nickel foil, nickelplattiert, a. nickel-plated. 

Fig. 3. Isotherm pm = /(H/Ni) at 25°C obtained during hydrogen desorption from nickel foil saturated with hydrogen. After Baranowski and BocheAska (11a).

A series of powder photographs was taken in a Norelco camera 360 mm. in circumference which holds the film in the Straumanis arrangement and permits a maximum Bragg angle of 87-6°. The copper K radiation was filtered through 0-001 in. nickel foil. Eastman No-Screen X-ray film was used throughout. All photographs were taken at room temperature, 26 + 2° C. 

Tsakalakos, T. and Hilliard, J. E., Elastic Modulus in Composition-Modulated Copper-Nickel Foils, 7. Appl. Phys.,Mo. 5A, 1983,pp. 734-737. 

Cathodic deposition of bismuth(in) telluride films has been reported [224] also on copper and nickel foils, from aqueous nitric acid solutions of bismuth oxide and tellurium oxide in molar ratios of Bi Te = 3 3 and 4 3, at 298 K. The... 

McCammon et al. have studied fine nickel particles using Ni Mossbauer spectroscopy [22]. The measured average hyperfine field of 10 nm particles at 4.2 K was 7.7 T for nickel foil, it was found to be 7.5 T. Application of an external magnetic field of 6 T caused a reduction of the hyperfine splitting to 1.5 T as a consequence of the negative hyperfine field at Ni nuclei. 

The 3 mm disc was covered by a 3 pm thick polycrystalline nickel foil, then a polycrystalline molybdenum disc was placed on top of the nickel foil. This composite sandwich was placed between two alumina supports and heated for 30 min at 1350°C. The cross-sections used for microanalysis were prepared by cutting with a wire saw in a direction perpendicular to the grain boundary, then mechanically and chemically polished. 

Recently, such a temperature oscillation was also observed by Zhang et al (27,28) with nickel foils. Furthermore, Basile et al (29) used IR thermography to monitor the surface temperature of the nickel foil during the methane partial oxidation reaction by following its changes with the residence time and reactant concentration. Their results demonstrate that the surface temperature profile was strongly dependent on the catalyst composition and the tendency of nickel to be oxidized. Simulations of the kinetics (30) indicated that the effective thermal conductivity of the catalyst bed influences the hot-spot temperature. 

These researchers also tried nickel foil cladding on fhe SS430 to make the plate before fhe boronizafion process was applied to add a protective coating to the nickel surface for improvemenf of the corrosion resistance. The major... 

The nickel foil and a cadmium electrode were immersed in a stirred solution which was 0.5 M in CdSOj and 1 M in NHj Cl. Cadmium and nickel electrodes were shorted through an ammeter. This resulted in a rapidly decaying current which stabilized at about... 

Figure 13 shows the calibration curve of phase-lag for the nickel foils of various thickness. This result suggests the possibility of estimating the thickness of plated materials on the metal. Figure 14 shows the PAXAS spectrum of nickel-plated copper. In the photoacoustic amplitude spectrum, EXAFS of copper at the subsurface of sample was still detected clearly. This means that PAXAS method can be applied... 

Fig. 13. Calibration curve of phase-tag for the heat wave propagation in nickel foil. Chopping frequency 27.6 Hz. See text for other experimental detail...

Although the theoretical studies predict solvent medium breakdown before the onset of actinium electrodeposition, there have been reports of Ac(0) electrodeposition from aqueous solutions utilizing several different methods [8, 9]. One set of studies [8] describes the electrodeposition of actinium from nitric acid solutions, with varying pH values (1.0-4.0) being set to the appropriate level by the addition of sodium hydroxide. The anode and cathode in these studies were platinum metal, and the current density was varied from 50 to 200 mA cm . The authors found that quantitative electrodeposition of actinium could be achieved under various conditions, with the shortest electrolysis time of 1 h being obtained with a current density of200 mA cm and a pH of 2.0. A second study employed a saturated aqueous solution of urea oxalate (ca 6.6% at 30 °C) as an electrolyte for the electrodeposition of Ac onto a nickel foil cathode [9]. The authors of this study found that the yield of electrodeposited Ac increased with time and reached a near quantitative maximum yield of 97% at a current density of 53 mAcm after 2 h. The Ac electrodeposits were suitable for further study using nuclear spectroscopy. 

Fiq. 3. Para-ortho hydrogen conversion on nickel foil annealed at different temperatures (225° to 500°C.) according to Cremer and Kerber (19) Arrhenius plot. 

Cold rolling of the powdered precursor NiAlj (10 to 20 fxm particle size), mixed with granules of Mond nickel (carbonyl nickel, which is very ductile) on stainless-steel or nickel foils, creates coatings of 20 to 30% coarse porosity (dp > 10 gm), which firmly adhere to the supporting foil (76). Due to the excessive sheer and stress exerted during rolling, the foils are deformed and must be shaped according to demands after this process has been finished. 

Thin nickel foil is used to slow down monoenergetic 10-MeV protons. What is the maximum thickness that can be used if one wants the straggling to be < 1% of the mean transmitted energy What is the mean transmitted energy in this case ... 

We studied methane reforming kinetics at atmospheric pressure. The utilization of circulation flow systems made it possible to use nickel foil as... 

Ammonia gas is passed over sodium heated in a glass tube to a temperature of 300°—400°. Since the glass is attacked, the sodimn shonld rest in a trough of nickel foil. When powdering the sodamide, it should first be moistened with benzene, since it is very hygroscopic. 

Figure 6. Photograph of the nickel foil with some needle-like plates (a) and its micrograph (b) a - x 4, b - x 270.

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