查询词典 speculum metal

By comparing properties with graphite-anode,high silicon cast iron anode,lead-silver anode,platinized anode and mixed metal oxide anode,we considered that the mixed metal oxide anode is the most ideal and advanced auxiliary anode material.

目前，外加电流阴极保护技术已广泛应用于地下储罐、钢筋混凝土、船舶、桥梁、化工设备等许多结构的防腐。2阴极保护用阳极的比较和分析2.1牺牲阳极牺牲阳极保护法是指在腐蚀

The results show that: the tensile strength, flexural strength and flexural modulus increase by about 10.4%, 62.1% and 122.3% respectively when the mass fraction of the aluminum powder increases from 0 to 50%, while elongation at break and impact strength decrease by about 65.0 and 74.4% respectively; the tensile strength, elongation at break and impact strength all increase with decreasing the particle sizes of the aluminum powders.b Nylon-12 coated metal powders for the indirect SLS process were prepared by the dissolution precipitation process. The coated powders have only 1.0 wt% nylon-12, and their SLS green parts have sufficient strength for features as small as 1.0 mm to be built and post-processed and high dimensional accuracy. The green parts were subjected to the post processing processes including binder decomposition and infiltration of epoxy resin, and then the metal/polymer composite parts with relatively high strength and accuracy were formed.At present, micron-scale inorganic fillers have been widely used to reinforce nylon SLS parts.

将该法制备的尼龙12覆膜金属粉末用于以下两个方面：a使用铝粉增强尼龙12的SLS成形件，通过溶剂沉淀法制备尼龙12覆膜铝复合粉末，研究了铝粉含量及粒径对SLS成形件性能的影响，结果表明：铝粉分散均匀，并与基体有良好的界面粘接；当铝粉含量从0增加到50wt％时，成形件的拉伸强度、弯曲强度、弯曲模量分别提高10.4％、62.1％和122.3％，冲击强度和断裂伸长率下降65.0％和74.4％，耐热性及尺寸精度也得到提高；断裂伸长率、冲击强度及拉伸强度均随着铝粉粒径的减小而增大。b使用溶剂沉淀法制备了间接法SLS用尼龙12覆膜金属粉末，该覆膜粉末中聚合物粘接剂的含量仅为1.0 wt％，其SLS初始形坯具有较高的精度以及足够满足后处理要求的强度，最小精细结构的尺寸达1.0 mm。

In order to study the absorption and accumulation of Pb in spinach grown in soil polluted by Pb or combined heavy metal, a pot experiment was carried out. The contents of heavy metals in the shoot and roots at the seedling and harvest stages, and the accumulation and distribution rates of each metal element were investigated.

通过盆栽试验对苗期和收获期菠菜地上部和地下部的重金属含量进行测定，并计算各元素的累积率和分配率，以了解土壤Pb污染和重金属复合污染条件下菠菜Pb的吸收和积累规律。

In this thesis, we described the synthesis, crystal structure and some properties ofa series of block metal phosphites and transition metal phosphitesand summarized the rules of synthesis and compared the difference of structures andsynthesis.

本论文主要研究在中温水热条件下，第IIIA族金属Ga，In和过渡金属V，Cd的亚磷酸盐微孔材料的合成与表征，探讨亚磷酸盐微孔材料在结构上的特点和组成上的多样性。

Transition metal phosphides have recently been the focus of research due to their higher activity compared to metal sulfides for HDS and HDN.

最近十几年，过渡金属磷化物以其高HDN和HDS活性和稳定性迅速成为加氢精制领域研究的热点。

Nickel phosphide was chosen as the HDN catalyst in the present dissertation because it is reported to have the highest activity among transition metal phosphides. For the supported nickel phosphide catalysts, mesoporous MCM-41 was used as the carrier. The effect of support modification and the introduction of a secondary metal species on the activity of supported nickel phosphide catalysts were studied.

本论文以磷化镍催化剂为研究对象，考察了MCM-41负载的磷化镍催化剂的制备及其对喹啉的HDN反应性能，载体和活性组分的改性对喹啉HDN反应性能的影响，以及TiO_2的引入对非负载的磷化镍催化剂HDN反应的影响。

Hydro-metal Structure industry is a relatively independent Sector in Water Resources and Electric Power industry, mainly engaging in design, manufacturing, installation and commissioning of various large-sized metal structure products needed in Water Resources and Electric Power projects, such as flat steel gate, radial steel gate, penstocks, hoist, ship locks, etc.

水工金属结构行业是水利水电行业内相对独立的一个产业，主要从事水利水电工程所需的各类闸门、拦污栅、压力钢管、船闸、启闭机等大型金属结构产品的设计、制造、安装、调试业务。

Al2O3 matrix of non-noble metal combustion promotor CuO-CeO2/Al2O3 was modified by metal oxidates, such as MgO and Fe2O3, for changing the matrix structure to improve the performance of sulfur resistance and sulfur transfer.

通过考察金属氧化物(MgO、Fe2O3 等)对 FCC 工艺中非贵金属助燃剂 CuO-CeO2/Al2O3的 Al2O3载体改性所引起载体结构的变化，研究对助燃剂抗硫、硫转移性能的影响。

Using analyses of the surface chemical species formed on palladium in both conditions of flowing oxygen and the ammonia oxidation reaction,it is confirmed that the surface of palladium,at temperatures above 800℃,is a multilayer structure with the bright palladium metal surface being overed by a thin layer of palladium metal vapour and then by a layer of palladium oxidevapour.

本文分析了在流动氧气氛和氨氧化反应过程中Pd的表面化学状态，表明在800℃以上温度Pd的表面应是1种多层结构：光亮的Pd金属表面复盖着一层薄的Pd金属蒸气，Pd蒸气上又复盖着一层PdO蒸气。

Thecompounds were dispersed in the melted silver-based brazing filler metal inamorphous particles as nucleators of heterogeneous nucleation, so that made themelted filler metal form Ag and Cu solid solution as well as Cu solid solutioncontaining CePb or CeBi and that eliminated the negative effects caused by Pb orBi.

通常情况下它们以无定性态存在于银基钎料中，成为非均匀生核的生核剂，使银基钎料形成银固溶体+铜固溶体+含CePb或CeBi化合物的铜固溶体相，从而消除了 Pb或Bi的有害影响。

You can buy sweetened beverages, if that suits you.

你若喜欢的话，可以买些含有糖精的混合饮料。

As many of you are probably aware, Nick and Vanessa were recently faced with an embarrasing sex scandal after naked pictures of the two getting jiggy with it in a hot tub surfaced the net.

正如很多你可能知道，尼克和 Vanessa 最近面临一个尴尬的绯闻事件后，赤裸裸的图片两个越来越jiggy与它在浴缸中的一个热点浮现净。