英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

neodymium    
n. 钕

钕

neodymium
n 1: a yellow trivalent metallic element of the rare earth
group; occurs in monazite and bastnasite in association
with cerium and lanthanum and praseodymium [synonym:
{neodymium}, {Nd}, {atomic number 60}]

Neodymium \Ne`o*dym"i*um\, n. [NL. Dee {Neo-}, and {Didymium}.]
(Chem.)
The chemical element of atomic number 60, one of the rare
earth elements. Symbol Nd. Atomic weight 144.27.

Note: It is a rare metallic element occurring in combination
with cerium, lanthanum, and other rare metals, and
forming amethyst-colored salts. It was originally
thought to be part of a supposed new element didymium,
obtained from cerite in 1843. Later this was resolved
into two elements, neodymium and praesodymium by von
Welsbach in 1885. It is chiefly trivalent. It is a
faintly yellow metal.
[1913 Webster PJC]

neodymium
Symbol: Nd
Atomic number: 60
Atomic weight: 144.24
Soft bright silvery metallic element, belongs to the lanthanoids. Seven
natural
isotopes, Nd-144 being the only radioactive one with a half-life of
10^10
to 10^15 years. Six artificial radioisotopes have been produced. The
metal is used in glass works to color glass a shade of violet-purple and
make it dichroic. One of the more reactive rare-earth metals, quickly
reacts
with air. Used in some rare-earth alloys. Neodymium is used to color
the glass used in welders' glasses. Neodymium is also used in very
powerful, permanent magnets (Nd2Fe14B). Discovered by Carl F. Auer von
Welsbach in Austria in 1885 by separating didymium into its elemental
components {praseodymium} and neodymium. The name comes from the Greek
words
"neos didymos" which means "new twin". Neodymium should be considered
highly toxic, however evidence would seem to show that it acts as little
more than a skin and eye irritant. The dust however, presents a fire and
explosion hazard.


请选择你想看的字典辞典：
单词字典翻译
Neodymium查看　Neodymium　在百度字典中的解释百度英翻中〔查看〕
Neodymium查看　Neodymium　在Google字典中的解释Google英翻中〔查看〕
Neodymium查看　Neodymium　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Neodymium - Wikipedia
    Neodymium is used in neodymium–iron–boron magnets, which produce strong magnetic fields from small, lightweight components These permanent magnets are used in audio equipment, computer hard disk drives, electric vehicle motors and the generators of some wind turbines
  • Neodymium | Rare Earth Element, Uses Properties | Britannica
    neodymium (Nd), chemical element, a rare-earth metal of the lanthanide series of the periodic table Neodymium is a ductile and malleable silvery white metal It oxidizes readily in air to form an oxide, Nd 2 O 3, which easily spalls, exposing the metal to further oxidation
  • Neodymium - Element information, properties and uses | Periodic Table
    The most important use for neodymium is in an alloy with iron and boron to make very strong permanent magnets This discovery, in 1983, made it possible to miniaturise many electronic devices, including mobile phones, microphones, loudspeakers and electronic musical instruments
  • Endangered Element: Neodymium - American Chemical Society
    Neodymium is one of the more reactive lanthanides; with important uses in advanced electronic technologies, transportation, energy, and defense
  • Neodymium magnet - Wikipedia
    A neodymium magnet (also known as NdFeB, NIB or Neo magnet) is a permanent magnet made from an alloy of neodymium, iron, and boron that forms the Nd 2 Fe 14 B tetragonal crystalline structure [1] They are the most widely used type of rare-earth magnet [2]
  • Neodymium (Nd): Uses, Supply Risk Where Its Mined
    Neodymium (Nd, atomic number 60) is a light rare earth metal and the main ingredient in neodymium-iron-boron (NdFeB) magnets, the strongest magnets known They power electric vehicle motors, many wind turbine generators and a long list of electronics
  • Neodymium Facts, Symbol, Discovery, Properties, Uses
    Neodymium (pronounced as nee-eh-dim-ee-em) belongs to the family of lanthanides metals and denoted by the chemical symbol Nd [1, 2] It comprises of five naturally-occurring stable isotopes whose mass numbers range from 142 to 148 of which Nd-144 is a radioisotope [4]
  • Neodymium - Rare Earths
    On this page you can find out more about neodymium: from its properties and areas of application to the deposits and mining of this rare earth element
  • Amazon. com: Neodymium Magnets
    Browse heavy-duty neodymium magnets with excellent holding power Ideal for home, office, garage, and creative projects
  • Rare Earth Elements - Purdue University
    Neodymium is used in the production of permanent magnets with boron and iron, these magnets have a wide range of uses in computers and mobile phones Neodymium is not found in the earth's crust as a free element but in the minerals monazite and bastnaesite





中文字典-英文字典  2005-2009