A method for uniformly coating powdery substrates by magnetron sputtering

Schmid, G.; Eisenmenger‐Sittner, C.

doi:10.1016/j.surfcoat.2013.10.012

Cited by 24 publications

(12 citation statements)

References 33 publications

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“…In order to decrease the critical diffusion temperature, the glass permeability has to be further optimized. With this method, random close packing of up to f = 0.765 can be reached [60], however, not higher than given in Eqn (3.14). A comparison is given in Figure 9.…”

Section: Further Increasing Storage Densitiesmentioning

confidence: 79%

“…After that, the spheres were coated by magnetron sputtering [60] with TiO 2 , Pt and Ru at different film thicknesses. A detailed discussion of the coating of catalytic films will not be presented at this point, but film thicknesses and material are given in Figure 11, showing an overview of some results.…”

Section: Selected Experimentsmentioning

confidence: 99%

“…Hybrid hydrolytic hydrogen storage system G. H. S. Schmid et al distribution, that is, particles of size x mixed with particles of size y. With this method, random close packing of up to f = 0.765 can be reached [60], however, not higher than given in Eqn (3.14). This accounts for spheres and for hydride particles.…”

Section: Further Increasing Storage Densitiesmentioning

confidence: 99%

“…For the experiments, S38 HGMs were coated with catalyst material with a sputtering process as described in Ref. [60]. For that, TiO 2 , Pt, and Ru coatings and combinations thereof were applied.…”

Section: Selected Experimentsmentioning

confidence: 99%

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A hybrid hydrolytic hydrogen storage system based on catalyst-coated hollow glass microspheres

Schmid

Bauer

Eder

et al. 2016

Int. J. Energy Res.

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Summary Hydrogen‐pressurized hollow glass microspheres (HGMs) in combination with a hydride bear the potential of storing hydrogen in feasible amounts. Therefore, the approximately 20‐µm diameter spheres are heated up and pressurized with hydrogen at a pressure of 85 MPa, so hydrogen diffuses into the spheres. After the spheres are cooled down, hydrogen can be stored at room temperature without excessive security measures. To release the stored hydrogen, heat has to be applied again to reach temperatures of about 250 °C (523.15 K). To reach this temperature, it is suggested in this work to use an exothermal chemical reaction, which produces hydrogen as a by‐product. In this case, an NaBH4–water reaction will be discussed, which has to be initialized by a catalyst deployed on the HGMs. It will be shown that hydrogen storage densities of up to 20 wt% and 50 kg/m3 can be theoretically achieved with the proposed hydrogen storage system consisting of hydrogen‐pressurized HGMs and a hydride, that is, NaBH4. Volumetric storage density and other aspects, such as water management, temperature restriction, stoichiometric restriction and hydrogen diffusion through glass, will be discussed. Due to resulting high water vapour pressures, a pressure vessel will still be needed in the concept. This paper shall give an overview of theoretically achievable storage densities with the proposed system. Experiments were carried out regarding catalytic promoted hydrolysis with HGMs, and resulting storage densities were determined. These experiments show good agreement with theory. However, they will be addressed only briefly in the outlook of the paper because a detailed discussion would go beyond the scope of this work. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Further Increasing Storage Densitiesmentioning

confidence: 79%

Section: Selected Experimentsmentioning

confidence: 99%

Section: Further Increasing Storage Densitiesmentioning

confidence: 99%

Section: Selected Experimentsmentioning

confidence: 99%

See 2 more Smart Citations

A hybrid hydrolytic hydrogen storage system based on catalyst-coated hollow glass microspheres

Schmid

Bauer

Eder

et al. 2016

Int. J. Energy Res.

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“…Abe and co-workers have also published details of a drum-based system for RF sputtering of e.g., Pt coatings onto small charges (2g) of silica particles [20,21], and Poelman, et al describe a rotating drum for depositing vanadia-based catalysts for the oxidative dehydrogenation of propane [22]. Schmid has published several papers on the use of angled rotating cups positioned under magnetrons, particularly for coating glass microspheres with refractory metals [23,24]. Yu, et al also use an ultrasonic vibration generator in a similar manner to tumble fly-ash cenosphere particles during the deposition of titania [25].…”

Section: Introductionmentioning

confidence: 99%

A Novel Technique for the Deposition of Bismuth Tungstate onto Titania Nanoparticulates for Enhancing the Visible Light Photocatalytic Activity

et al. 2016

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Abstract:A novel powder handling technique was used to allow the deposition of bismuth tungstate coatings onto commercial titanium dioxide photocatalytic nanoparticles. The coatings were deposited by reactive pulsed DC magnetron sputtering in an argon/oxygen atmosphere. The use of an oscillating bowl with rotary particle propagation, positioned beneath two closed-field planar magnetrons, provided uniform coverage of the titania particle surfaces. The bismuth/tungsten atomic ratio of the coatings was controlled by varying the power applied to each target. The resulting materials were characterized by X-ray diffraction, energy-dispersive X-ray spectroscopy (EDX), Brunauer-Emmett-Teller (BET) surface area measurements, transmission electron microscopy (TEM), and UV-visible diffuse reflectance spectroscopy. Photocatalytic properties under visible light irradiation were assessed using an acetone degradation test. It was found that deposition of bismuth tungstate onto titania nanoparticles resulted in significant increases in visible light photocatalytic activity, compared to uncoated titania. Of the coatings studied, the highest photocatalytic activity was measured for the sample with a Bi/W atomic ratio of 2/1.

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Formation of Copper Coating on the Surface of Titanium Hydride Using Quadruple Magnetron Sputtering

Zaitsev

Прохоренков

Kashibadze

et al. 2023

Lecture Notes in Civil Engineering

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A method for uniformly coating powdery substrates by magnetron sputtering

Cited by 24 publications

References 33 publications

A hybrid hydrolytic hydrogen storage system based on catalyst-coated hollow glass microspheres

A hybrid hydrolytic hydrogen storage system based on catalyst-coated hollow glass microspheres

A Novel Technique for the Deposition of Bismuth Tungstate onto Titania Nanoparticulates for Enhancing the Visible Light Photocatalytic Activity

Formation of Copper Coating on the Surface of Titanium Hydride Using Quadruple Magnetron Sputtering

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