查询词典 rare earth

In precision alloy (soft, including Nd-Fe-B rare earth permanent magnet materials, including, expansion, flexibility, hot bi-metals, electric resistance), high temperature alloy and stainless steel (Ni-Cr system, precipitation-hardening grades, grade maraging ) materials and products in research, development, trial and production areas such as the domestic advanced level, some products up to international standards.

在精密合金（软磁、包括钕铁硼及稀土材料在内的永磁、膨胀、弹性、热双金属、电阻电热）、高温合金和不锈钢（镍铬系、沉淀硬化系、马氏体时效系）材料及制品的研究、开发、试制和生产等方面居国内先进水平，部分产品达到国际水平。

The polymerization mechanisms of DTC, TMC and CL initiated by Ln 〓 were fully studied for the first time, and proved to be a"coordination insertion anionic mechanism". Monomer coordinated to rare earth metal on the carbonyl group, and opened ring via acyl-oxygen bond cleavage, forming a growing chain.

本文首次研究了Ln〓引发DTC、TMC和CL聚合的机理，证实都符合&配位插入阴离子机理&：单体首先以环外羰基和引发剂中稀土原子配位，并发生羰基加成，随之通过酰氧键断裂开环而插入到Ln-O键中实现链引发，然后各单体重复上述稀土原子参与的配位、加成、开环、插入聚合步骤，活性链在Ln-O端增长。

The RE aqueous phase was first separated as an independent solid phase from the earthy black weathered mineral by reducingextracting method. It is a new combining state of rare earth elements in natural mineral.

用还原提取法首次将稀土水成相作为一个独立的固相分离出来，这是稀土元素在自然界矿物中的一种新的赋存形态。

Another rare earth compound Mg_3La is found when mischmetal content is more than 3%.

当添加稀土量较大(≥3%)时，检测发现了另一种稀土化合物相Mg_3La。

Rare earth compound Al_(11)La_3 is found in matrix when adding La-Pr-Ce mischmetal to Mg-7Li-1Al alloy.

Mg-7Li-1Al合金中加入镧镨铈混合稀土后，组织中出现了稀土化合物相Al_(11)La_3。

By using magnetron sputtering technique, the rare earth films including Ce-rich mischmetal, La-rich mischmetal, lanthanum and yttrium were prepared on glass, ITO glass and Si substrates under the vacuum environment. The crystal structure, surface morphology, electrochemical properties and optical performances during the hydriding/dehydriding process were investigated, the reaction mechanism and invalidation reason were analyzed as well.

本文采用直流磁控溅射方法分别在玻璃、ITO玻璃和Si片等基体上制备了富铈、富镧、La和Y等稀土系薄膜，对所制备的稀土薄膜在气态和电化学充放氢过程中的晶体结构、表面形貌、电化学性能和光学性能等进行了研究，并对其反应机理和失效原因进行了探讨。

The conductivity of three rare-earth nitrates: Ce(NO3)3, La(NO3)3 and Y(NO3)3 ,was measured in non-aqueous solvent such as: C2H5 OH、CH3 COCH3、DMF at different temperatures. The use of formula has calculated the molar conductivity of Ce(NO3)3, La(NO3)3 and Y(NO3)3 at 25℃.

研究了不同温度下3种稀土硝酸盐：Ce(NO3)3、La(NO3)3、Y(NO3)3，在非水溶剂中（无水乙醇、丙酮、DMF）的电导性质，并利用公式求得25℃时Ce(NO3)3、La(NO3)3、Y(NO3)3的摩尔电导率。

The use of rare earth vanadates as supports for active gold catalysts opens up new routes in the research work for high performance catalysts. Bismuth vanadate micro/nanocrystals with different morphologies were synthesized by surfactant assisted hydrothermal/solvothermal methods.

建立了表面活性剂辅助的水热及溶剂热合成方法，通过选用合适的表面活性剂及控制单体浓度，获得了一系列不同晶形及形貌的BiVO4微/纳米晶，研究了晶体结构与生长行为的相关性。

Rare-earth doped borates(BO3),phosphates(PO4),vanadates(VO4), vanado-phosphate(YO4),borosilicate(LaBSiO5), and aluminate phosphors had been prepared by some different methods, such as high temperature solid state method, hydrothermal method, co-precipitation method and so on.

中文摘要：采用高温固相法、水热法、共沉淀法等不同方法制备了一系列掺稀土的稀土正硼酸盐BO3、正磷酸盐PO4，矾酸盐VO4，矾磷酸盐YO4和硼硅酸盐LaBSiO5及铝酸盐等荧光粉。

Rare-earth doped borates(BO3),phosphates(PO4),vanadates(VO4), vanado-phosphate(YO4),borosilicate(LaBSiO5), and aluminate phosphors had been prepared by some different methods, such as high temperature solid state method, hydrothermal method, co-precipitation method and so on.

采用高温固相法、水热法、共沉淀法等不同方法制备了一系列掺稀土的稀土正硼酸盐BO3、正磷酸盐PO4，矾酸盐VO4，矾磷酸盐YO4和硼硅酸盐LaBSiO5及铝酸盐等荧光粉。

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。