dysprosium

/dis'prousiəm/

Thân thiện

A scientist holds a small sample of dysprosium in a laboratory.

Definition

1. Noun:
   • A chemical element: Dysprosium is a metallic element with the symbol Dy and atomic number 66. It is part of the lanthanide series, often referred to as the rare earth elements.
   • Properties: It is a soft, silvery metal that is relatively stable in air at room temperature. As a trivalent element, it typically forms compounds with a +3 oxidation state. Some of these compounds exhibit strong paramagnetic properties, meaning they are highly magnetic.

Usage Examples

• Noun:
  • Dysprosium is used in the control rods of nuclear reactors.
  • The magnet contained a small amount of dysprosium to increase its strength.
  • Scientists are studying the magnetic properties of dysprosium compounds.

Advanced Usage

• In material science: Dysprosium is critical in the manufacturing of high-performance permanent magnets, particularly neodymium-iron-boron (NdFeB) magnets, where it is added to improve coercivity (resistance to demagnetization) at high temperatures.
  • The electric vehicle motor's efficiency relies on magnets doped with dysprosium.
• In nuclear technology: Due to its high neutron absorption cross-section, dysprosium is used in nuclear reactor control rods.
  • Dysprosium titanate is a material considered for use in reactor control systems.

Variants and Related Words

• Dysprosium oxide (Dy₂O₃): A white, powdered compound of dysprosium used in ceramics and as a dopant in various materials.
  • The phosphor was activated with dysprosium oxide.
• Dysprosium(III) ion (Dy³⁺): The common ionic form of dysprosium in its compounds.
  • The solution contained green dysprosium(III) ions.

Synonyms

• Element 66: Referring to its atomic number.
• Dy: Its chemical symbol.

Related Phrases and Terms

• Rare earth element: The group to which dysprosium belongs.
  • Dysprosium is one of the less abundant rare earth elements.
• Lanthanide: The series of elements including dysprosium.
  • Dysprosium is a heavy lanthanide.

Học thuật

Noun

1. a trivalent metallic element of the rare earth group; forms compounds that are highly magnetic

Từ đồng nghĩa

• Dy
• atomic number 66