查询词典 rare earth

The geochemical characteristics and behavior of rare earth elements in soils developed on the basalts in the northern part of Hainan Island erupted in different time were studied as well as the REE partition in the soil formation process and its implication on soil development degree.

研究了海南岛北部不同时期喷发的玄武岩上发育土壤中稀土元素的地球化学特征和行为，探讨成土过程中稀土元素的分异及其对土壤发育程度的指示作用。

The results of XPS about the boron-rich rare-earth borides synthesized by themethod mentioned above show that the valence of La is +3, and the valence of Smand Eu is a fluctuation system in which the average valence is about 2.6 for Smand 2.4 for Eu.

对〓(x=0.1，0.3，0.5，0.7，0.9)及〓(x=0.1，0.3，0.5，0.7，0.9)两个系列富硼双稀土硼化物的XPS研究表明：在这两个系列硼化物中La的价态均为+3价Sm的价态不随Sm含量的变化而变化，而Eu的价态随着Eu含量的变化而变化，随着Eu的含量的增加，Eu的价态逐步升高，当x=0.5时达到一极大值，然后随着Eu含量的增加Eu的价态逐步降低。

The total density of state of the the boron-rich rare-earth borides〓(R=La, Nd, Sm, Eu)are calculated using discrete variational X〓method.

计算所得到的态密度与XPS价带谱基本上相符，由于态密度与XPS价带谱的对应关系，表明计算结果的正确性。

Two new kinds of Ti based cermets with addition of rare earth elements Er and Y have been developed.

开发了新型的含稀土元素Er、Y的Ti基金属陶瓷。

Ni-Cr-B-Si alloy powder with adding rare earth was cladded by CO2 laser on the surface of 45 steel, then Ni-based coating which is combined in metallurgy with the matrix and has good performance was obtained.

为提高零件表面的耐磨性和耐蚀性，采用CO2激光器在45钢表面熔覆添加稀土的Ni-Cr-B-Si合金粉末，获得了与基体呈冶金结合的、性能良好的镍基涂层。

The Ni-based alloy was cladded on the T10 steel surface by laser cladding technology, and the changes of microstructure and properties of Ni-based alloys by adding WC hard phase and nano-rare earth oxides La2O3 were studied.

中文摘要：采用激光熔覆技术在T10钢表面激光熔覆Ni基合金，并研究了在Ni基合金中加入WC硬质相、纳米稀土氧化物La2O3后的性能和组织结构的变化情况。

Interlayer oxidized zone can be divided accurately by Fe_2O_3, Fe_2O_3/FeO and U parameters. We can correct the field macroscopic color zoning by combining the macroscopic zoning and microscopic zoning. Univalent major elements components(Al_2O_3, SiO_2, K_2O, Na_2O) show remarkable activity at the process of interlayer oxidizing, their contents are variable and mingled in different zones and it can't be used in zoning. But we can speculate the developmental degree of interlayer oxidized zone and uranium mineralization according to the concentration trends and variation characteristics of sensitivity group, activity group and their ratios .(3)The comparatively steady elements such as lithiphile elements, sulfophile elements and high field strength elements change regularly at the process of interlayer oxidation except some radioactive elements. Trace elements and rare earth elements commonly enrich in thin rock clast such as mudstone, in which the enriched elements species are more than those in the whole rock, which indicate that the regeneration action in caulking matter are more deep than that in whole rock at the process of interlayer oxidation, and the reallocate intention of trace elements in main minerlized rock in Tuha basin are more intensive than that in Yili basin at the process of deposition ,diagenesis and later changes .

根据化学蚀变参数PC值和分离迁移位等将常量元素组分分为敏感组分组、活动组分组、次活动组分组和惰性组分组，不同组分可分别用于讨论层间氧化带低温地球化学中不同问题；敏感组分(变价元素组分Fe_2O_3、FeO)和U在层间氧化带中迁移富集规律明显，Fe_2O_3／FeOFe~(3+／Fe~(2+)比值具分带判别能力，配合U含量对层间氧化带进行较准确的分带，可克服野外宏观颜色分带偏差：提出Fe~(3+)／Fe~(2+)分带判别值在不同盆地、不同地段不同，除受氧化作用控制外，流体酸碱度不同也是重要因素的观点，对找矿实践有实际指导意义；活动组分(Al_2O_3、SiO_2、K_2O、Na_2O)在层间氧化作用过程中具有较明显的活动性，其含量值变化跳跃，在不同分带相互交织，不具分带指示意义；但利用敏感组分、活动组分及其比值在层间氧化带中的变化特征可推测层间氧化带发育的完善程度及其含矿性；次活动组分组(CaO、MgO、MnO_2)含量低，变化规律性差；惰性组分组(TiO_2、P_2O_5)含量低，活动稳定，可用来反映沉积物源特征。

It is also an excellent matrix material for rare-earth dopant.

YAG也是一种优秀的稀土离子掺杂基质材料。

The results indicated that the dopings of appropriate amount of rare earth ions improved the dielectric constants, where the optimal doping concentratrations of Er3+ and Eu3+ ions were around 4.5% and 5.7%, respectively.

结果表明，稀土离子的适量掺杂使BST薄膜介电常数有所提高，其中， Er3+和Eu3+的最佳掺杂浓度分别为4.5%及5.7%左右时，介电常数值达到最高。

The company produces sulfur Clematis in the domestic use of free cutting steel smelting especially when the effect, followed by calcium lines, rare-earth lines, carbon line, calcium barium line, titanium wire in many domestic and foreign steel mills have been used for many years, performance technical indicators are in line with the standards, to meet the assessment requirements of steel plant, the user satisfaction with the unanimous response, the Company regularly send senior engineers steel feed line to the user guide the feeding line of site technology, jointly improve product quality.

本公司生产的硫铁线在国内使用在冶炼易切削钢时效果尤佳，其次硅钙线、稀土线、碳线、硅钙钡线、钛线在许多国内和国外钢厂已使用多年，性能技术指标均符合标准，达到炼钢厂的考核要求，用户一致反应满意，本公司定期派炼钢喂线高工到用户现场指导有关喂线工艺，共同提高产品质量。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。