TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

DYSPROSIUM [5 records]

Record 1 2011-02-08

English

Subject field(s)
  • Ferrous Alloys
  • Magnetic Materials and Ferromagnetism
OBS

Users of permanent magnets know of the very high magnetic coercivity exhibited by certain rare earth-iron alloys, most commonly neodymium-iron-boron... but also including such other rare earth elements as dysprosium for higher anisotropy... Very similar alloys have been developed which excel in related magnetic properties. Take for example, the alloy with terbium and dysprosium commonly known as Terfenol-D... which exhibits a very high magnetostriction; this alloy is said to have "Giant" Magnetostriction.

OBS

... a miniature actuator ... utilizes a Terfenol-D rod; only the end of the rod is visible, attached to a metal dome for actuation. The length of the rod changes as current is applied to the coil surrounding it. The housing acts as part of the magnetic circuit, which also includes a conventional permanent magnet for biasing (not visible). Thus, actuation is provided only by the changing length of the rod, although some mechanical amplification (e.g.: using a lever arm) may be advantageous.

OBS

Magnetostrictive material, such as these Terfenol-D rods that are several centimeters long, changes its length in a magnetic field. Originally developed for military sonar, the alloy is finding use in actuators, vibration controllers and sensors.

French

Domaine(s)
  • Alliages ferreux
  • Matériaux magnétiques et ferromagnétisme
OBS

Le Terfenol-D, alliage de métaux de faible résistance électrique, développe des courants de Foucault lorsque la fréquence de vibration augmente, d'où des pertes. [...] Autre inconvénient du Terfenol-D : son coût élevé, obstacle qui pourrait être surmonté grâce à des alliages à base de terres rares moins chères.

Spanish

Save record 1

Record 2 2009-10-09

English

Subject field(s)
  • Industrial Ceramics
  • Mineralogy
CONT

For control rod applications in thermal reactors, dysprosium titanate is used both in pellet(density 6 g/cc) as well as in vibrocompacted powder form(density 4-5 g/cc)...

French

Domaine(s)
  • Céramiques industrielles
  • Minéralogie
CONT

Dans les réacteurs à eau bouillante, les éléments absorbants sont constitués de croix insérées entre les éléments combustibles. Le carbure de bore, non enrichi en10B, y est présent sous forme de poudre vibrocompactée, dont la densité relative peut atteindre 70 %.

Spanish

Save record 2

Record 3 - external organization data 2002-01-10

English

Subject field(s)
  • Chemistry
  • Compartment - Canadian Nuclear Safety Commission
DEF

A rare earth element or lanthanide having atomic number 66. A lustrous silvery metal ...

French

Domaine(s)
  • Chimie
  • Tiroir - Commission canadienne de sûreté nucléaire
DEF

Corps simple [...], de poids atomique 162,5, [numéro atomique] 66, métal extrait d'une terre rare.

Spanish

Campo(s) temático(s)
  • Química
  • Compartimiento - Comisión Canadiense de Seguridad Nuclear
Save record 3

Record 4 2001-10-10

English

Subject field(s)
  • Permanent Magnets
CONT

Rare earth magnets include Sm-Co (Samarium-Cobalt) magnets and Nd-Fe-B (Neodymium-Iron-Boron) magnets. ... rare earth permanent magnets have many distinguishing characteristics, such as a large Maximum Energy Product, (one performance index for permanent magnets). Dozens of magnetic materials which contain rare earth have been developed recently. Two major families of rare earth permanent magnets, Sm-Co magnets and Nd-Fe-B magnets, have been widely used in a variety of applications. Each family has its own advantages and disadvantages.

OBS

Permanent Magnet Materials. Permanent magnets are used in the following major groups: acoustic transducers, motors and generators, magneto mechanical devices, and magnetic field and imaging systems. You will find permanent magnets in many products, such as televisions, telephones, computers, audio systems and automobiles. The permanent magnet family consists, in general terms, of non-rare earth permanent magnets and rare earth magnets.

OBS

Rare Earths : A family of elements with an atomic number from 57 to 71 plus 21 and 39. They are lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, and yttrium.

French

Domaine(s)
  • Aimants permanents
CONT

Récemment, l'apparition sur le marché d'aimants permanents à base de terres rares (Sm-Co ou Fe-Nd-B) a permis la réalisation de nouveaux séparateurs à haute intensité. Ces derniers se substituent dans beaucoup de cas aux appareils traditionnels du fait de leurs coûts d'investissement et de fonctionnement nettement inférieurs.

Key term(s)
  • aimant à base de terres rares

Spanish

Save record 4

Record 5 2001-10-10

English

Subject field(s)
  • Permanent Magnets
CONT

The non-rare earth magnets include Alnico (Aluminum-Nickel-Cobalt) magnets and Ceramic (Strontium and Barium Ferrite) magnets. Rare earth magnets include Sm-Co (Samarium-Cobalt) magnets and Nd-Fe-B (Neodymium-Iron-Boron) magnets. ... rare earth permanent magnets have many distinguishing characteristics, such as a large Maximum Energy Product, (one performance index for permanent magnets). Dozens of magnetic materials which contain rare earth have been developed recently. Two major families of rare earth permanent magnets, Sm-Co magnets and Nd-Fe-B magnets, have been widely used in a variety of applications. Each family has its own advantages and disadvantages.

OBS

Rare Earths : A family of elements with an atomic number from 57 to 71 plus 21 and 39. They are lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, and yttrium.

OBS

As opposed to "rare-earth magnet."

French

Domaine(s)
  • Aimants permanents

Spanish

Save record 5

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