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ZIRCONIUM OXIDE [9 records]

Record 1 2016-02-26

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
ZrO2
correct, formula, see observation
O2Zr
correct, formula, see observation
CONT

zirconium oxide :... Occurs in nature as bad deleyite. Properties : Heavy white amorphous powder... Derivation : By heating zirconium hydroxide or zirconium carbonate.... Uses :(Unstabilized) Production of piezoelectric crystals; high-frequency induction coils; colored ceramic glazes; special glasses...

OBS

Chemical formula: ZrO2 or O2Zr

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
ZrO2
correct, formula, see observation
O2Zr
correct, formula, see observation
CONT

Zircone. [...] Caractéristiques physiques : Poudre blanche, amorphe, lourde, inodore, insipide, cristaux monocliniques. [...] Usages : Thérapeutique [...], manchons à incandescence, pigment, peintures, encres d'imprimerie, abrasifs opacifiant (céramique) [...]

OBS

Formule chimique : ZrO2 ou O2Zr

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
Entrada(s) universal(es)
ZrO2
correct, formula, see observation
O2Zr
correct, formula, see observation
DEF

Óxido de circonio [...]

CONT

La circona es un polvo blanco refractario que funde a 2700 °C y que, aglomerado, raya el vidrio.

OBS

Fórmula química: ZrO2 ou O2Zr

Save record 1

Record 2 2016-01-26

English

Subject field(s)
  • Mineralogy
DEF

A mineral... consisting of a black oxide of yttrium, cerium, calcium, tantalum, and zirconium.

French

Domaine(s)
  • Minéralogie
DEF

Tantalate zirconifère naturel, avec cérium, yttrium, voisin de la samarskite.

Spanish

Campo(s) temático(s)
  • Mineralogía
DEF

Tantalato de circonio, con cerio e itrio [...]

OBS

[Tantalato] parecido a la samarskita.

Save record 2

Record 3 2013-04-29

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
(Ca,Th,Ce)Zr(Ti,Nb)2O7
formula, see observation
DEF

A black monoclinic(pseudocubic) oxide of zirconium, calcium, thorium, titanium, rare earths, and other elements...

OBS

Chemical formula: (Ca,Th,Ce)Zr(Ti,Nb)2O7

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
(Ca,Th,Ce)Zr(Ti,Nb)2O7
formula, see observation
DEF

Minéral (oxyde) du système cristallin monoclinique pseudo-cubique, dimorphe avec la calciobetafite, se présentant en cristaux pseudo-octaédriques aplatis, noir, à éclat résineux.

OBS

Formule chimique : (Ca,Th,Ce)Zr(Ti,Nb)2O7

Spanish

Campo(s) temático(s)
  • Mineralogía
Entrada(s) universal(es)
(Ca,Th,Ce)Zr(Ti,Nb)2O7
formula, see observation
DEF

Circotitanato de calcio [...] que cristaliza en el sistema cúbico; es un mineral negro.

OBS

Fórmula química: (Ca,Th,Ce)Zr(Ti,Nb)2O7

Save record 3

Record 4 2012-04-12

English

Subject field(s)
  • Mineralogy
  • Economic Geology
DEF

A mineral composed of an oxide of uranium, zirconium, thorium, calcium, tantalum, and niobium with some rare-earth metals.

French

Domaine(s)
  • Minéralogie
  • Géologie économique
OBS

Il s'agit, en principe, de composés quadratiques hémiédriques [...] On les trouve d'ailleurs en éléments isolés de faible taille, ou en grains ou en masse concrétionnée, mais très rarement en éléments bien cristallisés. [...] la teinte générale est noir brun à noir de velours, poussière brune.

Spanish

Save record 4

Record 5 2011-12-22

English

Subject field(s)
  • Nuclear Fission Reactors
CONT

The term MOX stands for Mixed Oxide and is used to describe any mixture of uranium and plutonium oxides … For LWR [light water reactor] fuel, MOX is formed into fuel assemblies that are very similar to standard LEU [low enriched uranium] fuel assemblies. As with LEU, the MOX is formed into cylindrical pellets, enclosed in zirconium tubes, or fuel rods. The fuel rods are arranged into a rectangular or hexagonal array. A typical MOX fuel assembly will weigh one tonne or more, of which around 500-600 kg will be MOX pellets.

Key term(s)
  • mixed oxide fuel assembly

French

Domaine(s)
  • Réacteurs nucléaires de fission

Spanish

Save record 5

Record 6 2011-11-23

English

Subject field(s)
  • Nuclear Fission Reactors
DEF

... the tube of material that houses the nuclear fuel pellets and provides the containment of radioactive species produced during fission.

CONT

Disclosed herein is a zirconium alloy nuclear fuel cladding tube for use in nuclear fuel rods of a nuclear reactor. The nuclear fuel cladding tube comprises an elongated hollow metal tube for accommodating a nuclear fuel and a metal oxide film formed on the outer surface of the metal tube wherein the metal is a zirconium alloy and the oxide film has a thickness of 0. 5~3. 7 µm.

CONT

A fuel rod for a nuclear reactor fuel assembly includes a cladding tube and a plurality of fuel pellets contained in the tube and composed of fissile material, such as uranium dioxide, having a single enrichment of U-235. At least some of the fuel pellets have an annular configuration. Some of the annular fuel pellets have an annulus of a first size, whereas other ... annular fuel pellets have an annulus of a second size different from the first size.

French

Domaine(s)
  • Réacteurs nucléaires de fission
CONT

Matériaux de gainage des réacteurs à eau [...] Concernant les tubes de gainage, ses principales fonctions sont de divers ordres : assurer le maintien de la colonne combustible; isoler le combustible du fluide caloporteur pour le protéger de son action corrosive; évacuer l'énergie; assurer le confinement des produits de fission.

CONT

Dans un combustible pour réacteur à eau légère la matière fissile se présente sous forme de petits cylindres en oxyde d'uranium fritté dits «pastilles». Un certain nombre de ces pastilles est empilé dans un tube - dit tube de gainage ou gaine - scellé aux deux extrémités par des bouchons soudés afin d'isoler la matière fissile du milieu extérieur; cet ensemble forme ce qu'on appelle un crayon combustible.

Spanish

Save record 6

Record 7 2010-06-01

English

Subject field(s)
  • Biological Sciences
DEF

Controlled pore support prepared by heating borosilicate glass to 500-700 °C, when it undergoes a phase separation. Subsequent leaching of the borate component leaves a porous support with closely controlled pore sizes. However, it is not suitable for industrial purposes owing to its high price and lack of stability due to the continuous leaching of silica from the particles during prolonged usage in continuous flow systems, especially in alkaline media. Various methods have been employed to overcome the stability problem including the deposition of a surface coating of zirconium oxide by impregnating the controlled pore glass with a zirconium salt under vacuum followed by calcination to the oxide.

CONT

Studies have been carried out on matrix stability and effects of coupling methodology on inorganic supports. Significant differences in controlled pore glass via azo-linkage and Schiff’s base linkage, Schiff’s base being the most stable. Similarly, many immobilized enzymes show increased stability to proteolysis. This increased stability has been used as the basis for a patented cleaning procedure in ... industrial immobilized [beta]-galactosidase columns for removing accumulated absorbed proteinous material from the column surface.

OBS

CPG is an abbreviation of controlled pore glass.

French

Domaine(s)
  • Sciences biologiques
CONT

La chromatographie d'exclusion, utilisant soit des billes de verre à porosité contrôlée (dont la matrice est rigide), soit de la cellulose biodégradable, permet l'isolement de protéines comme les albumines du lait (sur résines échangeuses d'ions négatifs), ou les globulines (sur résines échangeuses d'ions positifs).

OBS

CPG est une abréviation souvent citée dans les ouvrages français.

Spanish

Save record 7

Record 8 2009-09-17

English

Subject field(s)
  • Chemistry
  • Semiconductors (Electronics)
CONT

The experiments on electron irradiation of yttrium-stabilized zirconium oxide samples show the formation of strong elastic fields near interstitial dislocation loops. The fields increase with an increase in the loop radius and, when the loop radius reaches a certain critical value, the loops became unstable due to the beginning of plastic deformation and the formation of a dislocation network.

French

Domaine(s)
  • Chimie
  • Semi-conducteurs (Électronique)
CONT

Durcissement et fragilisation intragranulaire sous irradiation des aciers austénitiques [...] Selon la température d'irradiation, les obstacles microstructuraux intragranulaires suivants sont observés [...] boucles de dislocations interstitielles, fautées, sessiles.

Spanish

Save record 8

Record 9 1977-09-20

English

Subject field(s)
  • Astrochemistry and Cosmochemistry
  • Astronomy
OBS

(...) "type S" [show bands] of zirconium oxide and lanthanum oxide.

French

Domaine(s)
  • Astrochimie et cosmochimie
  • Astronomie
OBS

Classes S. Les étoiles de cette classe se distinguent de celles de la classe M par la présence des bandes d'oxyde de zirconium (ZrO) au lieu d'oxyde de titane (TiO).

Spanish

Save record 9

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