Critical Metals Explorer Launches Rare Earth Programs at Two …

The company has engaged Dahrouge Geological Consulting for the fieldwork, targeting rare earth elements (REE) and niobium-tantalum mineralization near known …

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Mineral profile Niobium

Niobium and tantalum do not occur naturally as free metals, but are essential components in a range of mineral species (Table 2). The majority of these are oxide minerals; silicates of …

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In vitro assessment of corrosion resistance and biocompatibility of

Modifying the Mg alloy surface with tantalum-based thin films is an effective process to reduce the rate of corrosion and improve biocompatibility. In the present work, ... Tantalum …

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Superconductivity of Tantalum, Niobium and Lanthanum Studied …

The properties of superconducting transition metal tunnel junctions are sensitive to the methods of junction preparation. The derivatives of a tantalum‐silver junction made by a …

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Two-level systems in nucleated and non-nucleated …

Tantalum stabilizes in a body-centered-cubic structure (α-Ta) under equilibrium conditions, but deposition at room temperature typically produces an initial amorphous layer from which surface energetics favor the growth of the …

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Saving qubits from lossy oxides | DOE National Quantum …

The Science: Previous studies have demonstrated that the niobium surface oxide serves as the major factor limiting coherence times of niobium superconducting qubits. By encapsulating …

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Systematic Improvements in Transmon Qubit Coherence Enabled by Niobium

Our surface-encapsulated niobium qubit devices exhibit T$_1$ relaxation times 2 to 5 times longer than baseline niobium qubit devices with native niobium oxides. When …

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Chemical Profiles of the Oxides on Tantalum in State …

In this study, we use variable energy X-ray photoelectron spectroscopy (VEXPS) to characterize the surface of Ta thin films employed in state-of-the-art superconducting circuits, with the aim of identifying possible …

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New Alloy Shocks Scientists With Its Nearly Impossible Strength …

The best cryogenic steels, specially engineered to resist fracture, are about 20 times tougher than these materials. Yet the niobium, tantalum, titanium, and hafnium (Nb 45 …

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Tantalum and Niobium Targets for High-Temperature Corrosion …

While not as universally corrosion-resistant as tantalum, niobium performs well in acidic environments, particularly at elevated temperatures. It also forms protective surface oxides like …

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Niobium/tantalum-based materials: Synthesis and applications in

Niobium/tantalum-based materials: Synthesis and applications in electrochemical energy storage. Author links open overlay panel Jingyi Ma a, Xiaotian Guo a, ... The size and …

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Western Alloys Co., Limited

Cathodic protection is the use of external DC power supply to make the metal surface into a cathode to achieve protection, this method consumes a lot of power, high cost. Anode …

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Reference Correlations for the Density and Thermal …

zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten have been critically examined with the intention of establishing reference correlations. ... which …

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Science Highlights – SQMS Center

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 …

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Oxidation Kinetics of Superconducting Niobium and a-Tantalum in

We analyze the nature of atmospheric oxidation of both niobium and a-tantalum surfaces at time scales relevant to fabrication, from sub-minute to two-week atmospheric …

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Recent Advancements of Niobium and Tantalum‐Based …

Abstract Niobium (Nb) and tantalum (Ta), transition metals with distinct physical and chemical properties, are highly attractive for applications in electrochemical energy …

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Si-oxide and Nb-oxide thicknesses after HF etching as a function …

Our surface-encapsulated niobium qubit devices exhibit T$_1$ coherence times 2 to 5 times longer than baseline niobium qubit devices with native niobium oxides.

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NIOBIUM AND TANTALUM

Tantalum (Ta) is a dense, tough and ductile element with very high melting point of 3017oC. It is also highly corrosion-resistant to most acids below 150oC and, in most cases, chemically inert. …

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Niobium Facts

Niobium (Nb), formerly known as Columbium (Cb), is a metal in group V-B of the periodic table with atomic number 41, an atomic weight of 92.91, and a density of 8.4 g/m 3.Niobium is …

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Niobium

Niobium (Nb) is one of refractory metals with a high melting point (2447 °C) in addition to high modulus of elasticity, low vapor pressure and thermal expansion and high thermal stability …

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Tantalum / Niobium / Polymer

Failure Mode Comparison of Tantalum and Niobium Oxide Capacitors Written By: George Zhang Abstract: The automotive industry has become highly dependent on advanced sensing and …

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Influence of niobium/tantalum doping on the hydrogen behavior of …

Influence of niobium/tantalum doping on the hydrogen behavior of ZrCo(110) surface. Author links open overlay panel Binjing Zhang a, Xiaoqiu Ye a, Wenhua Luo a, Ge ...

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Structure and Formation Mechanisms in Tantalum and Niobium …

Abstract. Improving the qubit's lifetime (T 1) is crucial for fault-tolerant quantum computing.Recent advancements have shown that replacing niobium (Nb) with tantalum (Ta) as the base metal …

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Systematic improvements in transmon qubit coherence …

niobium oxides have on coherence times of superconducting qubits, compared to native oxides of tantalum, aluminum or titanium nitride. Our surface-encapsulated niobium qubit devices exhibit T

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TPS Series

Low Leakage Current Aspect of Designing with Tantalum and Niobium Oxide Capacitors; New Tantalum Technologies: Tantalum Polymer and Niobium Oxide Capacitors; Voltage Derating …

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Vacuum brazing of tantalum, niobium and stainless steel

Vacuum brazing of tantalum, niobium and stainless steel. 1. Material characteristics: niobium has the characteristics of low elastic modulus, poor thermal conductivity, ... Surface treatment …

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Structure and Formation Mechanisms in Tantalum and Niobium …

Improving the qubit's lifetime (T 1) is crucial for fault-tolerant quantum computing.Recent advancements have shown that replacing niobium (Nb) with tantalum (Ta) as the base metal …

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Mineralogical Properties of a Refractory Tantalum-Niobium Slag …

As the surface area and pore size of the slag are very small, the leaching agent cannot fully penetrate the particles. ... Tantalum-niobium ore undergoes a series of high …

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Recent Advancements of Niobium and …

Niobium (Nb) and tantalum (Ta), transition metals with distinct physical and chemical properties, are highly attractive for applications in electrochemical energy storage (EES) devices. Their oxides, dichalcogenides, …

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Processing of columbite-tantalite ores and concentrates for

The resulting organic phase is returned to the combined tantalum/niobium extraction stage. Gaseous or aqueous ammonia is added to the aqueous niobium solution to precipitate …

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Structure and Formation Mechanisms in Tantalum and Niobium …

Improving the qubit's lifetime (T 1) is crucial for fault-tolerant quantum computing.Recent advancements have shown that replacing niobium (Nb) with tantalum (Ta) …

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Tantalum and Niobium Targets for High-Temperature Corrosion …

Tantalum targets and niobium targets offer a reliable route to producing corrosion-resistant coatings that function well in high-temperature, chemically aggressive environments. ...

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