Phase equilibria as related to crystal structure in the system niobium pentoxide-tungsten trioxide

Roth, Robert; Waring, J.L.

doi:10.6028/jres.070a.025

Cited by 134 publications

(97 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mixtures with concentrations 1.0 and 2.5 mol % of niobium pentoxide in WO 3 were pressed into pellets, which were packed and sealed in a platinum tube to avoid the sublimation of the WO 3 . After a few hours of calcination at 800 C, the samples were The sample was field-cooled (FC) from above 300K to 5 K and the magnetization was measured.…”

Section: Methodsmentioning

confidence: 99%

“…During the course with superconducting materials, our attention was drawn to the recent report of 2D [1] superconductivity (SC) at 91 K in Na 0.05 WO 3 . Stoichiometric WO 3 has an orthorhomic structure and it is diamagnetic insulator material, since the W 6+ 5d band is empty.…”

Section: Introductionmentioning

confidence: 99%

“…Stoichiometric WO 3 has an orthorhomic structure and it is diamagnetic insulator material, since the W 6+ 5d band is empty. When low concentration of Na 1+ ions are added, they donate their 3s electrons to the W 5d band, resulting in bulk metallic behavior and SC at 91 K. The heart of the present investigation is the assumption that it is possible to get SC in dilute substitution of Nb 5+ into WO 3 samples, despite the low N(E F ) [2].…”

Section: Introductionmentioning

confidence: 99%

“…For this reason we have prepared the W 1-x Nb x O 3 system with low amount of Nb concentration. A detailed study of the phase diagram [3] …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Itinerant-electron ferromagnetism in W(Nb)O3−δ

Felner

Asaf

Weger

et al. 2002

Physica B: Condensed Matter

View full text Add to dashboard Cite

The crystal structure and the magnetic properties of the W 1-x Nb x O 3-δ , (x<0.03) system have been investigated. In contrast to the orthorhombic diamagnetic WO 3 , the material with x=0.01 is paramagnetic down to 5 K. Introducing of 2.5 at. % of Nb into WO 3 leads to a tetragonal structure and to a weak itinerant ferromagnetic ordering below T C = 225 K. The saturation magnetic moment at 5 K is 1.07*10 -3 µ B , whereas the paramagnetic effective moment is 0.06 µ B per mole. This high ratio indicates itinerant ferromagnetism in W 0.975 Nb 0.025 O 3-δ .

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…For this reason we have prepared the W 1-x Nb x O 3 system with low amount of Nb concentration. A detailed study of the phase diagram [3] …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Itinerant-electron ferromagnetism in W(Nb)O3−δ

Felner

Asaf

Weger

et al. 2002

Physica B: Condensed Matter

View full text Add to dashboard Cite

show abstract

“…In the past, different binary phase diagrams, La 2 O 3 -WO 3 , WO 3 -Nb 2 O 5 , have been studied by various groups, Yoshimura [12], Roth and Waring [13]. Most of the time, no structural information was obtained because of the lack of single crystals of good quality.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the La2O3–Nb2O5–WO3 ternary phase diagram: Isolation and crystal structure determination of the original La3NbWO10 material

Barré

Adil

et al. 2015

Journal of Solid State Chemistry

View full text Add to dashboard Cite

Lithium‐Ion and Sodium‐Ion Hybrid Capacitors: From Insertion‐Type Materials Design to Devices Construction

Dong

et al. 2021

Adv Funct Materials

115

View full text Add to dashboard Cite

There is a great appeal to develop an omnipotent player combining lithium-ion batteries (LIBs) with the capacitive storage communities. Hybrid capacitors as a kind of promising energy storage device are attracting increasing attention in the main playground in recent years. Unlike supercapacitors (SCs) and LIBs, hybrid capacitors combine a capacitive electrode with a Faradaic battery electrode. In these hybrid cells, the capacitive electrode brings the power while the energy mainly comes from the Faradaic one. Numerous efforts have been conducted in the past decades; however, the research about hybrid capacitors is still at its infancy stage, and it is not expected to replace LIBs or SCs in the near future utterly. Here, the advances of hybrid capacitors, including insertiontype materials, lithium-ion capacitors, and sodium-ion capacitors, are reviewed. This review aims to offer useful guidance for the design of faradic battery electrodes and hybrid cell construction. Brief challenges and opportunities for future research on hybrid capacitors are finally presented.

show abstract

Phase equilibria as related to crystal structure in the system niobium pentoxide-tungsten trioxide

Cited by 134 publications

References 2 publications

Itinerant-electron ferromagnetism in W(Nb)O3−δ

Itinerant-electron ferromagnetism in W(Nb)O3−δ

Investigation of the La2O3–Nb2O5–WO3 ternary phase diagram: Isolation and crystal structure determination of the original La3NbWO10 material

Lithium‐Ion and Sodium‐Ion Hybrid Capacitors: From Insertion‐Type Materials Design to Devices Construction

Contact Info

Product

Resources

About