稀有元素化學 的英文怎麼說

中文拼音 [xīyǒuyuánsùhuàxué]
稀有元素化學 英文
rare element chemistry
  • 稀 : Ⅰ形容詞1 （事物出現得少） rare; scarce; uncommon 2 （事物之間距離遠; 空隙大） sparse; scattered 3...
  • 有 : 有副詞[書面語] （表示整數之外再加零數）: 30 有 5 thirty-five; 10 有 5年 fifteen years
  • 素 : Ⅰ形容詞1 （本色; 白色） white 2 （顏色單純） plain; simple; quiet 3 （本來的; 原有的） native Ⅱ名...
  • 學 : Ⅰ動詞1 （學習） study; learn 2 （模仿） imitate; mimic Ⅱ名詞1 （學問） learning; knowledge 2 （學...
  • 稀有 : rare; unusual; uncommon稀有貴金屬 rare precious metals; 稀有貨幣 scarce currency; 稀有氣體 rare g...
  1. All these rocks aforementioned are mainly parametamorphic rocks. milan, kaqiang and alamasi group underwent high - grade metamorphism of amphibolite facies, together with weak migmatism. they share the same geochemistry and total ree and many other chracters

    二者主要為副變質巖石，米蘭巖群和卡羌巖群、阿拉瑪斯巖群變質較深為角閃巖相，普遍弱混合巖化，它們具有非常相似的地球化學特徵，稀土元素總量及其它特點一致或相近。
  2. The compositions of usual elements and rare earth elements and inclusions of corundum megacrysts related to alkali basalt in changle, shandong province, are analyzed. in the main parts of corundum megacrysts are a large number of fluid - melting inclusions, zircon, ta - columbite inclusions, and in the central crystal core are a large number of melting inclusions. the corundum megacrysts were formed in different periods and different physical chemistry conditions. the crystal core was formed in magma system, and the main parts were formed in inhomogeneously geochemical conditions in which magam and fluid phases coexisted

    分析山東昌樂與堿性玄武巖有關的剛玉巨晶不同部位的常量元素、稀土元素及包裹體組成.剛玉巨晶的主體以大量流體?熔體包裹體、鋯石、鈮（鉭）鐵礦包裹體為主，而巨晶中的「晶核」部位則以大量的熔體包裹體為主，反映研究區的剛玉巨晶是在不同的階段形成的.剛玉「晶核」以及「銅皮剛玉」形成於熔體相為主的體系中，而主體剛玉則形成於熔體?流體過渡的急劇變化的不均一的地球化學環境中
  3. In this thesis, we research into the geochemical data of the groundwater from the granitoid weathering crust of the fogang granite in baisha region, guangdong province

    本文研究了廣東省白沙地區花崗巖風化殼地下水的水化學特徵，特別是與花崗巖的風化過程有關的稀土元素含量及其分佈模式。
  4. In recent years, the colossal magneto - resistance effect in rare - earth manganite perovskites of the type lni. xaxmno3 ( where ln is rear - earth irons la2 +, nd2 +, p2 + ; a is alkaline earth iron ca2 +, sr2 +, ba2 + ) has attract considerable attention in scientific studies due to its potential application. however, the poor temperature dependence of mr and the low - temperature mr effect and the ideal mr only in high field severely limit their practical utility. in this work, we prepared manganite perovskite lai - xsrxmno3 and soft - magnetic ferrite materials fe2o3 and ( ni, zn ) fe2o4 by using sol - gel method separately

    近些年來，人們發現在鈣鈦礦錳氧化物ln _ （ 1 - x ） axmno _ 3 （ ln為la ， nd ， pr等稀土金屬元素； a為ca ， sr ， ba等堿土金屬元素）中具有磁電阻（ magnetoresistance ）效應，由於它在磁記錄，磁傳感器方面具有廣泛的應用前景，同時也向傳統的磁記錄材料提出了挑戰，因而引起了物理學界的廣泛關注。
  5. 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。
  6. 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:利用江西省豐富的釔基重稀土，結合鎂、鋇、硅、鈣等元素的特性開發了釔基重稀土復合球化劑，該球化劑具有脫硫、脫氧、抗干擾元素、球化和抗球化衰退能力強，細化基體組織，白口傾向小，適用范圍寬等特點，應用於高爐冷卻壁，軋輥等關鍵鑄件上可提高心部力學性能和工藝出品率。
  7. Comparison of the characteristic parameters of immobile elements, such as ree, sc, th, ti etc and of the characteristics of sedimentology and mineralogy comes to a conclusion that the provenance of the sediment is different in the last glacial maximum and in the sub - interglacial stage, and they have the traits of mixed source. during the last glacial maximum the sediment in the outshelf of the southern east china sea was affected weakly by changjiang river and they are probably derived from the coast mountains of zhejiang - fujian province, which are near the southern east china sea

    通過對東海外陸架樣品的稀土元素和sc ， th ， ti等不活潑元素地球化學物源示蹤指標對比，再結合沉積學和礦物學特徵，判斷末次盛冰期與盛冰期以前的沉積物具有不同的物質來源，不同時期的沉積物都具有混合物源的性質，盛冰期東海南部外陸架沉積物受長江物源影響較小，可能來源於距東海南部較近的浙閩沿海山地。
  8. During the yanshanian phrase, the area is in the condition of contractional background, with multi - staged tectonic reversion. 5. through studying the origin of volcanic rocks and the characteristics of magma evolution, it concludes that there exist 3 originated areas of magma - from mantle, crust, and mantle - crust exchange. the basic magma of nandaling volcanic rocks of early jurassic is derived from upper mantle ; the magma of tiaojishan volcanic rocks of mid jurassic is formed in the contractional tectonic setting, and derived from the transition zone of crust and mantle interaction ; the acid magma of l

    5 、通過巖石化學、微量元素、稀土元素的研究，探討了不同級別節律的火山巖成因、巖漿演化等特徵，認為本區燕山期火山巖有三個巖漿源區，即地幔源、地殼源和殼幔混源，早侏羅世的南大嶺旋迴的基性巖漿，起源於上地幔；中侏羅世髫髻山旋迴火山巖是在相對擠壓環境中，巖漿起源於殼幔過渡帶；晚侏羅世無負eu異常的酸性巖漿來源於下地殼的古老結晶基底的局部熔融，有負eu異常的酸性巖漿來源於上地殼的局部熔融；早白堊世火山巖基性巖漿起源於上地幔，中性巖漿起源於下地殼底部的殼幔過渡帶。
  9. This important tectonic zone parallel to the isotopic geochemical steep zone, which represented a suture line between the yangtze and cathaysian blocks. the geochemical evidence of the jianshui volcanic rocks from the sw part of shizong - mile zone shows that their lithologic types are tholeiites with the comparative flat ree patterns and enrichment in th, depletion slightly in nb, ta, and flat hfse. thus, they may be formed in a back - arc basin with the characteristics between morb and island - a

    該構造帶西南段的建水火山巖地球化學特徵研究表明，該火山巖為拉斑玄武巖，具有較平坦的稀土分配型式， th較富集， nb 、 ta輕微虧損，高場強元素分佈較平坦，具有介於島弧和morb之間的地球化學特徵，可能形成於弧后盆地環境。
  10. Inorganic and nanomnaterials and are of extensive use in many science fields. for examples ~ they are being used in mechanics, chemistry, optics, electrics, seperation, catalysis, biochemistry. rare earth elements have unique properties and extensive applications owing to their special electronic configuration

    它綜合了無機、有機和納米材料的優良特性，在各個領域都有廣泛應用，現在它的應用領域已涉及到機械、化學、電子、分離、催化、生物等眾多領域。稀土元素特殊的電子構型，使其具有獨特的性質和廣泛的應用。
  11. Based on the rock ' s chemical analysis and compare of rare - earth element, it can see that the deposit gold origin chiefly possess two kinds : ( 1 ) the volcanic rock ; ( 2 ) golden fluid medium

    根據巖石化學分析和稀土元素對比，可以看出該礦床金的來源主要有兩種：基性火山巖系；含金流體。
  12. Inorganic chemicals ; organic or inorganic compounds of rare - earth metals, of radioactive elements or of isotopes

    無機化學品；稀土金屬，放射性元素及其同位素之有機及無機化合物
  13. Based on results of a large number of runs ， the following conclusions can be made at this stage of research. the fensile strength of the new steel added micro alloyed process is 1. 1 times. as large as that of original specimens. impact toughness improved by 300 %, elongation ratio increased by 79 % hardness has a little improvement than before. the obtained results demonstrate that the new material has supermechanical properties with the addition of the micro allolyed process

    並在常溫下對合金化鋼的力學性能進行了測試。試驗結果表明，通過微合金化抗拉強度提高了10 . 2 % ，沖擊韌性提高300 % ，延伸率提高了79 . 5 % ，硬度稍有提高。總之，加入復合稀土、釩、鎳等微合金元素提高了材料的綜合機械性能。
  14. The hexagonal barexfe, 2. xo, ( re denote la ^ nd > sm and gd ) ultrafine powders with m - type structure were firstly synthesized by a novel technique - - - - - - sol - gel combustion synthesis method which combines sol - gel method with low temperature combustion synthesis method. based on theoretical analysis and experimental study, the effects of the composition of the gel, the different kinds of intermediate, strength of solution, the amount of complexing agent, the different kinds of anions, the adding of dispersant, auto - propagating combustion and the condition in heat treatment of the gel on crystal phase, particle size, morphology and magnetic properties of bare ^ fe ^ o, ultrafine powders were firstly investigated systematically to clarify the optimum forming conditions

    本研究是在前人工作的基礎上，同時從制備方法和摻雜元素兩方面著手，以保證制備的粉體材料具有優異的性能，即首次利用溶膠?凝膠濕化學合成法和低溫燃燒合成法相結合的一種兼具二者優點的超細粉末新型合成技術? ?溶膠-凝膠燃燒合成法來完成稀土元素摻雜鋇鐵氧體bare _ xfe _ （ 12 - x ） o _ （ 19 ） （ re為la 、 nd 、 sm 、 gd ）超細粉末的制備。
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