heavy rare earths meaning in Chinese
重稀土
Examples
- Heavy rare earth metals and their compounds . determination of total rare earth contents . edta volumetric method
稀土金属及其化合物化学分析方法edta滴定法测定重稀土金属及其化合物中稀土总量 - 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。 - Abstract : by utlizing abundant local resource of ytirium and combining the characteristics of magnesium , barium , calcium and silicon , a sort of composite nodulizer - ytirium - based heavy rare earth nodulizer was developed which is characterized by its good desulphurizing and deoxidizing rate effect , excellent effect to neutralize anti - nodulizing effect of trace elements , strong nodulizng effect and degeneration - resistance , good effect to fine matrix structure , decreased chilling tendency and wide scope of applicatiom using this nodulizer to produce some important castings such as water - cooled wall of blast furnace and roller could increase mechanical properties of central area and casting yield
文摘:利用江西省丰富的钇基重稀土，结合镁、钡、硅、钙等元素的特性开发了钇基重稀土复合球化剂，该球化剂具有脱硫、脱氧、抗干扰元素、球化和抗球化衰退能力强，细化基体组织，白口倾向小，适用范围宽等特点，应用于高炉冷却壁，轧辊等关键铸件上可提高心部力学性能和工艺出品率。 - The lab has established a multi - component counter - current extraction theory and solved the problems in rare earth separation technology and has successfully established a big separation plant of heavy rare earths in high purity and high yield in jiangsu province , thus controlling the world trade market of heavy rare earths
1 .实验室建立了多组分的串级萃取分离理论，解决长期以来我国重稀土分离技术的难题，成功地在江苏省建成了一个高纯、高效重稀土分离的大企业，控制了世界重稀土市场。