查询词典 molybdenum

The main radiation cavity of the furnace consists of a high-purity alumina tube 25cm long x7cmi.d., heated by Molybdenum rod disilicide elements.

加热炉里的主要辐射腔是一条内直径7公分，长25公分的高纯度氧化铝管，由二硅化钼元素加热。

Molybdenum disilicide ; abrasive wear ; wear mechanism

二硅化钼；磨粒磨损；磨损机理

Si C particle reinforced molybdenum disilicide( Mo Si2 ) matrix composite has been fabricat- ed by wetmixing and hotpresssintering successfully.

Mo Si2 因其熔点高( 2 0 30℃)、密度适中( 6.2 4 g/cm3)、热膨胀系数低( 8.1× 1 0 -6K-1)、复合功能强、韧脆转变温度高( 95 0～ 1 2 5 0℃)、高温抗氧化性能优良而成为理想的高温结构候选材料。

Barry Trost and Kalindi Dogra at Stanford University were able to avoid that problem and other pitfalls in building the chemical by using a molybdenum catalyst.

斯坦福大学研究人员巴里·特罗斯特和卡林蒂·多格拉通过采用钼催化剂制造四氢大麻酚，可以避免上述问题。

In the Secondone,we presented a simple and expedient electrolytical reductionmethod to grow molybdenum blue bronze crystals from salts melts.The structure and composition were verified by single-crystal X-raydiffraction and XPS electron-probe analysis.

通过XPS和四园单晶X-射线衍射方法对单晶成份和结构，利用汇聚束电子衍射和STM方法对单晶的群对称性及表面电子结构进行分析研究，结果表明：生长的单晶具有高质量，且与国外制备的单晶一致，给进一步深入的研究工作提供了可靠的依据。

The results of in situ DRIFTS on propylene oxidation show that the allyl species originated from α-H abstraction of propylene were located at the wavenumbers of 1454 cm~(-1) and 1427 cm~(-1). The rate-determining step is the abstraction of an α-H abstraction from a lattice oxygen linked to a bismuth ion to form a π-allyl intermediate coordinated to a molybdenum ion. The metal-oxo group then attacks the allyl intermediate forming a σ-bonded oxygen-allyl species, which is in a rapid equilibrium with the π- bonded species. The σ-bonded species then transforms to acrolein by further abstraction of α-H. Such species as formate, carboxylate, carbonate transform to deep oxidation products. The acetone was derived from propylene by an enolic species at lower temperatures.

丙烯氧化反应体系的原位漫反射红外光谱研究结果表明，由丙烯脱氢生成的烯丙基中间物种吸收峰在1454cm~(-1)和1427cm~(-1)处；基于此提出了较完整的丙烯氧化反应网络：丙烯选择氧化生成丙烯醛主要经历丙烯脱除甲基上的一个H，生成烯丙基物种，该物种嵌氧生成σ-O络合物，脱氢得到丙烯醛前驱体，脱附生成丙烯醛；完全氧化产物是由催化剂表面上生成甲酸盐、羧酸盐、碳酸盐等形式的中间物种转化而成；较低反应温度下丙烯氧化生成丙酮，通过烯醇式中间物种氧化生成丙酮前驱体得到。

Through the rough stage small experiment,the effect of A-200 frother flotating the molybdenum ore was studied.

通过粗选段小型试验，研究了A-200起泡剂选钼效果，试验结果表明：A-200起泡能力强，起泡速度快，泡沫脆散性好，药剂用量小，可代替现用起泡剂用于选钼，并可降低选矿药剂消耗及成本。

Among several neutral oils, transformer oil shows the best agglomeration effect. For the complex tailings, in which over 90% of molybdenum distributed in the range of -0.038 mm, the optimal dosage of transformer oil and frother was about 12 kg/t and 0.5 kg/t respectively, and the least agitation time and rate should above 3 min and 400 r/min, respectively.

结果表明，在众多中性油中，变压器油表现出了较好的油团聚浮选效果，对于钼金属分布率高于90%的-0.038mm粒级的浮选尾矿，其合适用量需达到12kg/t左右，与之配合的起泡剂用量在0.5kg/t左右，油团聚时间及搅拌强度分别需达到3min和400r/min以上。

The crystalline mechanism of heteronuclear crystalline is found out by theoretical analyzing the chemical property of molybdenum delay composition.

通过对钼系延期药各组分的性质的分析研究，从理论上探讨其异核结晶的结晶机理。

The molybdenum delay composition was prepared by two methods -heteronuclear crystalline by decreased the liquid temperature or on common, and the mechanism of heteronuclear crystalline was discussed.

内容如下：本文选择了钼系延期药作为研究对象。采用手工混制和降温析出两种方法制备了钼系延期药，并从理论上阐述了降温析出异核结晶的原理。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐