查询词典 scandium

The study of optimum conditions of the colour reaction of scandium with chrome azurol S in the presence of tetradecyl pyridinium chloride and emulgent OP is reported in this paper.

研究了在氯化十四烷基吡啶及乳化剂OP 存在下，铬天青S与钪显色反应的适宜条件。

Background. The use of the erbium, chromium:yttrium-scandium-gallium-garnet laser has become accepted in the field of cavity preparation.

这一由奥地利科学家进行的研究证明，通过发展小型化、柔韧的纤维就可以使激光用于牙髓方面的治疗。

ScF3-MX molten salt was made from scandium oxide and ammonium hydrogen fluoride by solid state fluoridation under heating and melting.

研究制定了ScF_3-MX熔盐Al熔体中Mg热还原制备Al-Mg-Sc中间合金中南大学博士学位论文摘要的新工艺。

Ago a kind of misconception that the rare earth metals is very scarce in nature, in fact not the case, many of which elements such as lanthanum, cerium, praseodymium, neodymium and samarium in accordance with their distribution in nature is no less well-known people in some of the elements of industry, common There ore monazite, scandium yttrium stone, silicon and cerium stone, stone and brown curtains and other fluorocarbon calcium cerium ore.

以前有种错误概念，认为稀土金属在自然界很稀少，其实不然，其中很多元素如镧、铈、镨、钕和钐按其在自然界的分布不次于人们在工业上熟知的某些元素，常见的矿石有独居石、钪钇石、硅铈石、褐帘石和氟碳钙铈矿等。

Nilsson of Sweden in 1879 Scandium was discovered.

瑞典的尼尔松在1879年发现钪。

In this paper,aluminum- scandium alloys were prepared starting form scandium oxide by molten salt electrolysis.

本文采用了熔盐电解法研究铝钪合金的制备。

A mineral consisting of scandium yttrium silicate; a source of scandium.

一种由钪钇硅酸盐组成的矿物，是钪的来源。

Leaching of Scandium From Scandium Concentrate by HCl and 7~# reagent

其盐酸盐为白色结晶性粉末，熔点223～226℃。

The condition experiments of leaching scandium from scandium concentrate with HCl and 7~ reagent is carried out.

进行了盐酸加助溶剂浸出钪精矿的条件试验，得出其最佳工艺条件为：盐酸质量浓度35.3 g/L，液固体积质量比2.5∶1，浸出温度90℃，浸出时间10 h，物料粒度小于0.043 mm，加7#助浸剂，用量为40 g/t。

Through the thermodynamic calculation of the reaction that aluminum and magnesium reduce anhydrous scandium chloride molten salt to prepare aluminium-magnesium-scandium master alloy, we got that the standard equilibrium constant of the reaction is 1.074 ×10~(19), and the experimental equilibrium constant of it is approximately 6.874 × 10~(14)under around 1200 K and 1 standard pressure, which demonstrate that the reaction can take place and proceed thoroughly.

通过铝镁热还原无水氯化钪熔盐制备铝镁钪中间合金反应的热力学计算，得出：在1200K左右温度，1标准大气压下，该反应的标准平衡常数K为1.074×10~(19)，经验平衡常数K′约为6.874×10~(14)，这说明铝镁热还原无水氯化钪熔盐法制备铝镁钪中间合金的反应能够进行，而且进行的很彻底。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。