It is not as though the rare-earth elements-scandium, yttrium and lanthanum plus the 14 so-called lanthanides-are all that rare.
并非所有稀土元素都像钪、钇、镧加上14所谓的镧系元素那样稀少。
It suggests that rare-earth elements yttrium and praseodymium have certain genotoxicity.
提示稀土元素钇和镨具有一定的遗传毒性。
Yttrium serves as an ideal non - magnetic diluent for the rare - earth metals.
钇被用作稀土金属一种理想的非磁性稀释剂。
In this paper, basic principle and thermodynamic process of the electrochemical deoxidation purified rare earth metal yttrium are firstly demonstrated.
本文还首次对电化学脱氧提纯稀土金属钇的基本原理和热力学过程进行了论证。
Yttrium serves as an ideal non-magnetic diluent for the rare-earth metals.
钇被用作稀土金属一种理想的非磁性稀释剂。
With scandium and yttrium, they make up the rare earth metals.
加上钪和钇，一起组成稀土金属。
The effect of rare earth elements such as cerium, lanthanum and yttrium on electroless deposition rate of cobalt-nickel-boron alloy was studied.
研究了稀土元素铈、镧、钇对化学镀钴-镍-硼合金沉积速度的影响。
Compounds, inorganic or organic, of rare-earth metals, of yttrium or of scandium or of mixtures of these metals.
稀土金属、钇、钪及其混合物的无机或有机化合物。
The investigation of effects of rare-earth yttrium and boron, which are in the 3.5% nickel-containing steel welding electrode on low temperature toughness has been carried out.
对含镍3．5％低温钢手工电焊条配方中稀土钇与硼的作用进行了试验研究。
The stabilizing agent may include calcium, magnesium, yttrium salts of oxides and rare earth oxides.
该稳定剂可能包括钙，镁，氧化物和稀土氧化物钇盐。
With scandium and yttrium they make up the rare earth metals. their atoms have similar configurations and similar physical and chemical behaviour; the most common valences are3and4
加上钪和钇，一起组成稀土金属。它们的原子都有相似的配置，以及相似的物理和化学行为，最常见的原子价是3和4。
They comprise preferably indium, scandium, yttrium, rare earth metals and zirconium.
它们优选包括铟、钪、钇、稀土金属和锆。
The co precipitation behavior and the effects of impurity ions on the crystallization properties of yttrium base heavy rare earth carbonate were investigated.
本文对钇基重稀土碳酸盐沉淀过程中杂质铁、铝离子的共沉淀行为以及对碳酸稀土的结晶性能和结晶效果的影响进行了研究。
The present invention relates to a rare earth ion double-doped or three-doped or three-doped yttrium oxide base up-conversion luminescence material and its preparation method.
本发明是关于一种稀土离子双掺杂或者三掺杂的氧化钇基上转换发光材料及其制备方法，属于发光物理学中的发光材料领域。
Rare earth metal: Any of a large class of chemical elements including scandium (atomic number 21), yttrium (39), and the 15 elements from 57 (lanthanum) to 71.
稀土金属：一个化学元素大家族中的任何一种，包括钪(原子序21)、钇(原子序39)以及从57号元素(镧)到71号元素。
Rare earth metal: Any of a large class of chemical elements including scandium (atomic number 21), yttrium (39), and the 15 elements from 57 (lanthanum) to 71.
稀土金属：一个化学元素大家族中的任何一种，包括钪(原子序21)、钇(原子序39)以及从57号元素(镧)到71号元素。
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