轻稀土元素 meaning in Chinese
light rare earth elements
light rare earths
lree
rare-earth elements
Examples
- Activated agent of cerium that is abundant and cheap together with a little terbiumas additive is used in the study , to research and explore luminescent mechanism of aluminates strontium
本研究拟选用原料丰富、价格便宜的轻稀土元素铈作敏化剂，以铽作激活剂，对其在铝酸锶基体中的发光机理这一新领域进行研究和探讨。 - The result shows that with the addition of rare earth elements , ultrasonic irradiation and magnetic field , the chemical component , surface configuration , microstructure and properties of electroless co - ni - b and co - fe - b alloy changes remarkably . such kind of change can be described as the followings . firstly the depositing speed of electroless alloy bath is raised while the polarizability and cathodic overpotential are reduced ; secondly the surface quality of the alloy coating and adhesion of the coating and matrix are improved ; thirdly in the coatings the content of the elements in the transient group increases , but the content of cobalt decreased ; fourthly the amorphous structure is transformed to microcrystal structure and polycrystal structure ; fifthly the microhardness and wear resistance of the coating are enhanced ; sixthly coercitive force is reduced , and magnetoconductivity of the coating is increased ; lastly the magnetic intensity of the coating increases with the addition of energy and light rare earth elements such as ce , la and decreases with the addition of heavy rare earth elements such as y . on the other side , when the alloy coatings passes through the heat treatment under the temperature of 250 or 500 , their properties will change
结果显示化学沉积co - ni - b 、 co - fe - b工艺在稀土元素( ce 、 la 、 y 、 dy ) 、能量(超声波、磁场)介入后，沉积过程、合金成分、镀层形貌结构和性能都有显著变化，表现在：镀液的阴极极化过电位和极化度降低，沉积速度提高；镀层的结合力、表面质量改善；镀层中过渡族元素的含量增加，轻元素硼的含量降低，同时证实了稀土元素与过渡族元素共沉积的可能性；镀层的显微结构由非晶态向微晶和多晶态转变；镀层的显微硬度与耐磨性提高，力学性能优化；镀层的矫顽力降低；磁导率提高；镀层的磁化强度在能量(超声波、磁场)和轻稀土元素ce 、 la介入后提高，重稀土元素y介入后降低。 - When rees widely enter into environment and human body inevitably , peoples begin to pay more attention to the accumulation of rees in organism and the effect on the health of human body , this research consists of two parts : in the first part , the distributing rule of la and y in different tissues and organs were studied by adopting inductively coupled plasma mass spectrometer after organism absorbed it
本研究内容分为两部分： (一)采用电感耦合等离子质谱技术研究了生物体摄入轻稀土元素镧和重稀土元素钇后在不同组织器官的分布规律，同时测定了经稀土元素处理后的生物体的早期生物量，并就稀土元素的摄入量与组织器官内的积累量进行了相关性分析。