liquid oxygen, LOX - a bluish translucent magnetic liquid obtained by compressing gaseous oxygen and then cooling it below its boiling point; used as an oxidizer in rocket propellants air - a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; "air...
As is well known, solid oxygen appears in three modifications: α(below 23.5° K.); β(23.5°–43.5° K.); and γ(43.5° K. and melting point). In connexion with our investigations on the structure of solidified nitrogen and other gases, extensive work has been done with the object ...
In solid oxygen, the three phases occur namely, the α phase stable up to 23.9 K, β phase stable between 23.9 and 43.6 K and, the γ phase stable between 43.6 K and the melting point at 54.4 K, as also pointed out previously [1]. The α phase exists up to temperatures of the β...
a A proton-ion conducting electrolyte; and b an oxygen-ion conducting electrolyte. Full size image Oxygen-ion conductivity arises due to the mobility of oxygen point defects, which can be oxygen vacancies or the transport of oxygen in the positions of the interstitials via a hopping mechanism16...
The most common electrolyte material used in SOEC is yttria-stabilized zirconia (YSZ), which exhibits high oxygen ion conductivity and good mechanical strength. Zirconia dioxide has a high melting point of around 2973 K but suffers from phase transformation from the monoclinic to the tetragonal form...
The light blue color of liquid oxygen is caused by the bimolecular absorption, which is only allowed for singlet ground states [12,13,14,15,16,17]. Liquid oxygen solidifies at the melting point 𝑇𝛾l=54.4Tγl=54.4 K, where the 𝛾γ phase of solid oxygen (space group, 𝑃𝑚3...
A potentiometric oxygen sensor is formed having a logarithmic response to a differential oxygen concentration while operating as a Nernstian-type sensor. Very thin films of mixed conducting oxide mate
Water is a polar molecule, meaning the electrons are shared unequally in its covalent bonds. Water is made of one oxygen atom bound to two hydrogen atoms. Because oxygen is more electronegative it pulls the electrons closer towards it and gives oxygen a partial negative cha...
Virgin poly(arylene sulfide) resins are oxidatively cured by heat treatment at an elevated temperature below the melting point of the resin, under an oxidizing atmosphere comprising less than a 20 volume % oxygen concentration. The resulting polymer exhibits drastically improved thermal stability with ...
Oceanic anoxic events are geologically abrupt phases of extreme oxygen depletion in the oceans that disrupted marine ecosystems and brought about evolutionary turnover. Typically lasting ~1.5 million years, these events occurred frequently during the Mes