稀土族 的英文怎麼說
中文拼音 [xītǔzú]
稀土族
英文
rare earths-
The geologic, element and experimental study suggest the mechanism of small body, giant deposit in jinchuan is succeeding segregation whole magma chamber intruding from deep to emplace. the study is proof, supplementary and progress of the deep segregation, penetrating ore formation theory, which was advanced by mr tang zhongli, the academician of china. 5
特別是通過鉑族元素、稀土元素研究、實驗地球化學研究及其與實際資料的對比，提出了金川礦床成巖成礦是從深部到侵位持續熔離的新模式，論證、補充和發展了湯中立院士提出的深部熔離成礦說。Rare earth elements ( rees ) consist of lanthanide series with atomic numbers from 57 to 71, as well as scandium ( atomic number 21 ) and yttrium ( atomic number 39 )
稀土是指原子序數從57到71的鑭系元素以及與其同族的鈧和釔，共有17個元素。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
結果顯示化學沉積co - ni - b 、 co - fe - b工藝在稀土元素（ ce 、 la 、 y 、 dy ） 、能量（超聲波、磁場）介入后，沉積過程、合金成分、鍍層形貌結構和性能都有顯著變化，表現在：鍍液的陰極極化過電位和極化度降低，沉積速度提高；鍍層的結合力、表面質量改善；鍍層中過渡族元素的含量增加，輕元素硼的含量降低，同時證實了稀土元素與過渡族元素共沉積的可能性；鍍層的顯微結構由非晶態向微晶和多晶態轉變；鍍層的顯微硬度與耐磨性提高，力學性能優化；鍍層的矯頑力降低；磁導率提高；鍍層的磁化強度在能量（超聲波、磁場）和輕稀土元素ce 、 la介入后提高，重稀土元素y介入后降低。According to tectono - metallogenic setting in combination with main mineral distribution and metallogenic types and ore - forming epochs in this orogenic belt, the authors used the theory of metallogenic series to divide the deposits of the north qilian early palaeozoic convergent epicontinental cu, pd, zn, w ( mo ), au, ophiolite metallogenic belt and the south qilian early palaeozoic epicontinental rifting cu, ni ( pt ), cr, au, rare elements and pyrite metallogenic belt into six series
文章依據成礦構造環境，結合區域主要礦種分佈及其成礦類型和成礦時代等特徵，應用礦床成礦系列理論，將祁連造山帶北祁連早古生代匯聚陸緣銅、鉛、鋅、鎢（鉬） 、金、蛇蚊石成礦帶和南祁連早古生代陸緣裂解帶銅、鎳（鉑族） 、鉻、金、稀土、黃鐵礦成礦帶中的礦床劃歸為6個成礦系列。Rare earth materials
稀土族材料Methods for the analysis of magnesium and magnesium alloys - determination of total rare earths in magnesium alloys gravimetric method
鎂和鎂合金分析方法.第8部分:鎂合金中全部稀土族元素含量測定For the special location and the southbound shift of the economic centrality, the population of three gorges including the districts of minor nationalities as tu, had been ever increasing in a great way in the song dynasty. but the absolute quantity is not large, so the population density was still low
由於特殊的地理位置，加上經濟重心的南移和移民的發生，整個宋代三峽地區包括土家族等峽區少數民族在內，人口基本上是一直呈增長趨勢的，且有時增長幅度較大，但絕對數量並不多，仍屬于地曠人稀的地區。分享友人