Detailed studies of plasma processed niobium surface were conducted. The results showed that plasma processing using reactive oxygen is very effective to remove hydrocarbons from the niobium surface. Studies showed that such plasma processing increases the work function of the niobium surface systematically in the …
Niobium (Nb) is a transition metal commonly used as an alloying element for increasing strength, toughness, corrosion resistance, and other properties of steel and superalloys. Pure Nb, however, is a very interesting metal for its excellent superconductivity. This makes it suitable for producing superconducting magnets and devices for particle …
The capillary constants have been determined by the hanging-drop method for liquid vanadium, niobium, and tantalum, while the density has been determined from the indirect determination of the volume of the detached part of a hanging drop, from which the specific surface free energy has been calculated.
Our surface-encapsulated niobium qubit devices exhibit T1 relaxation times 2–5 times longer than baseline qubit devices with native niobium oxides. When capping niobium with tantalum, we obtain median qubit lifetimes above 300 μs, with maximum values up to 600 μs.
TANIOBIS is one of the world's leading suppliers of tantalum and niobium powders and other products used in capacitors, semiconductor materials, and surface acoustic wave (SAW) devices. Its excellent product lineup is backed …
An oxide layer which forms on the surface of tantalum can act as an insulating (dielectric) layer. Because tantalum can be used to coat other metals with a very thin layer, a high capacitance can be achieved in a small volume. ... There are several complicated steps involved in separating the tantalum from the niobium. A lot of tantalum is ...
This takes place via surface acoustic wave (SAW) filters based on niobium oxide and tantalum oxide. For processing data using high-performance processors, an ultrathin layer containing tantalum ensures ongoing disruption-free operation. TANIOBIS also processes tantalum for what are known as tantalum electrolytic capacitors.
Niobium and tantalum-based oxides were recovered from mining tailings. These oxides were used as starting material for growing micro- and nanostructures by the evaporation method. The morphology and crystal structure of the final oxides were evaluated using X-ray diffraction (XRD), micro-Raman spectroscopy, and scanning electron microscopy …
Tantalum surface oxidation: Bond relaxation, energy entrapment, and electron polarization. ... Influence of niobium/tantalum doping on the hydrogen behavior of ZrCo(110) surface. International Journal of Hydrogen Energy, Volume 48, Issue 46, 2023, pp. 17577-17592.
Niobium and tantalum are transition metals that are almost always found together in nature because they have very similar physical and chemical properties. Their properties of hardness, conductivity, and resistance to corrosion largely determine their primary uses today. The leading use of niobium (about 75 percent) is in the production of high …
The surface morphology of tantalum-niobium oxide composite thin films coated at two different Nb concentrations is displayed in Fig. 6. The two types of films coated on Mg alloy show almost identical morphology.
The band structures and Fermi surfaces of niobium and tantalum have been calculated via the augmented-plane-wave (APW) method. Relativistic effects have been included in the tantalum but not the niobium calculation. The resulting niobium and tantalum Fermi surfaces are similar to a Fermi-surface model for the vanadium-group transition metals …
Like tantalum, it is resistant to corrosion owing to the formation of a surface oxide layer. Approximately 90% of niobium use is attributed to the steel industry, predominantly as a micro alloy with iron. ... or lower than, associated tantalum grades. Common niobium-tantalum minerals found in Australian pegmatites include columbo …
In this work, the chemical profile of the surface of tantalum films grown on c-plane sapphire using variable energy X-ray photoelectron spectroscopy (VEXPS) is …
The surface energies of solid molybdenum, niobium, tantalum, and tungsten at 1500 °C have been determined using the multi-phase equilibration technique. The values obtained were 2050, 2550, 2680 and 2830 erg/cm 2, respectively.
Here, the authors report a niobium and tantalum co-doped perovskite cathode exhibiting high electroactivity below 500 °C, and argue that the dopants improve the …
The results highlight that surface encapsulated niobium qubit devices exhibit T1 coherence times 2 to 5 times longer than baseline niobium qubit devices with native …
The capillary constants have been determined by the hanging-drop method for liquid vanadium, niobium, and tantalum, while the density has been determined from the indirect determination of the volume of the detached part of a hanging drop, from which the specific surface free energy has been calculated. The values are compared with published ones.
The scientists hypothesized that the thickness and chemical nature of this tantalum oxide layer played a role in determining the qubit coherence, as tantalum has a …
The ideal morphologies can enlarge the specific surface area, which can shorten the diffusion distance between the ions, ensuring a fast transfer pathway for the …
This book provides a comprehensive analysis of the science, technology, and applications of Tantalum and Niobium-based capacitors. The author discusses fundamentals, focusing on thermodynamic stability, major degradation processes and conduction mechanisms in the basic structure of Me-Me2O5-cathode (Me: Ta, Nb). …
Niobium is the favorite metal for the fabrication of superconducting accelerating cavities. While the majority of these cavities are formed from niobium sheet material a large number of copper cavities have been made with a thin niobium film on the inner surface produced by sputter coating.
Recent advancements have shown that replacing niobium (Nb) with tantalum (Ta) as the base metal significantly increases T 1, likely due to a less lossy native …
Surface Mount Capacitors for DC-DC Converter Applications Written By: Naotaka Hata Abstract: Tantalum, polymer, ceramic, film, and aluminum capacitors each offer a different set of operating and performance characteristics.
Improving the qubit's lifetime (T1) is crucial for fault-tolerant quantum computing. Recent advancements have shown that replacing niobium (Nb) with tantalum (Ta) as the base metal significantly increases T1, likely due to a less lossy native surface oxide. However, understanding the formation mechanism and nature of both surface …
Tantalum and niobium, two corrosion resistant metals, form alloy in all proportions. The presence of even small amounts of niobium, like <5%, in tantalum greatly reduces the corrosion resistance of the later. ... (foil, wire, or powder sintered); (b) the tantalum oxide dielectric surface (anodic oxidation of the surface of the tantalum …
We present a novel transmon qubit fabrication technique that yields systematic improvements in T$_1$ relaxation times. We fabricate devices using an …
The surface energies of solid molybdenum, niobium, tantalum, and tungsten at 1500 °C have been determined using the multi-phase equilibration technique. The values obtained were 2050, 2550, 2680 and 2830 erg/cm 2, respectively. The grain boundary energy/surface energy ratios for the four metals varied from 0.28 to 0.38 with …
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