查询词典 niobium

"It is difficult to separate from niobium, the element above it in the periodic table , with which it shares many properties."

计算金属结合能的尝试几乎没有超过周期表上的第一行的范围。

Niobium is the metallic element with the highest transition temperature.

铌是转变温度最高的金属元素。

The oxidation behavior of these alloys was discussed in terms of the low solubility of niobium in cobalt and the microstructure of the alloys and the oxide scales.

从合金的和所生成氧化膜的显微组织特征，尤其是从铌在钴中溶解度低的角度，对合金的氧化行为进行了讨论。

Details of the measurement method and of the related calibration techniques are reported. Results of the normal spectral emissivity of niobium at 633, 753, 827, and 905 nm from room temperature to its melting point are presented.

文中详细介绍了测量方法和测量装置的各组成部分及其工作原理，给出了利用该方法测得的铌在633，753，827和905nm波长下的法向光谱发射率结果，测量不确定度在5%以内。

A MoSi2 coating on C-103 niobium alloy was prepared by packing cementation, and the microstructures of the oxidized and unoxidized coatings were analyzed by XRD, SEM and EDS techniques. The formation mechanism of the silicide coating was investigated. The results show that the silicide coating is formed by reactive diffusion and the silicification process obeys parabolic relation.

采用包渗法在C-103铌合金基体上制备MoSi2涂层，通过X射线衍射、扫描电镜和能谱分析等手段研究涂层表面、截面形貌以及氧化后涂层结构变化，并分析硅化过程中涂层的形成机理。

Niobium suboxide anode is prepared with method similar to that for tantalum electrolytic capacitor and its electric property is investigated by electrolytic capacitor anode testing.

采用玛瑙研磨混料-还原焙烧-过筛工艺制备了低价铌氧化物粉末，用正交试验法及方差分析对工艺条件进行了优化，用XRD、SEM测试方法对产物物相、微观形貌进行了研究；按与钽电解电容器相似的工艺将低价铌氧化物粉末制成了阳极，并采用电解电容器阳极测试方法对其电性能进行了研究。

The optimal processing conditions are as follows: roasting temperature at 1 000℃, roasting time for 40 min, the ratio of NbH dosage to theoretic dosage at 1.1. The specific capacity of niobium suboxide of preparation by agate grind procedure is 69.50 mF·V·g-1, the loss is 11.25%, the leakage current is 1.8×10-4A·F-1·V-1, and the electrical properties are better than that of the national standard (GB/T 3136-1995) of FTa16-300 tantalum powder for capacitor.

用正交试验法及方差分析对玛瑙研磨工艺进行优化，得到制备低价铌氧化物最佳条件是：焙烧温度为1 000℃，焙烧时间为40 min， NbH用量与理论量之比为1.1，所制得的产物杂质含量低，比容为69.50mF·V·g-1，损耗为11.25%，漏电流为1.8×10-4A·F-1·V-1，其电性能指标高于FTa16—300电容器钽粉国家标准(GB/T 3136—1995)所规定的值。

Superconducting function: Niobium-titanium alloy demonstrates superconducting function of zero resistance when it is lower than critical temperature.

超导功能：铌-钛合金在温度低于临界温度时，呈现出零电阻的超导功能。

The in-situ process of alumina particles and niobium aluminide in aluminum matrix composite, using Al-20wt% Nb2O5 system, has been studied by means of differential thermal analysis together with X-ray diffraction analysis.

利用差分扫描热分析研究了利用Al－Nb2O5系统制备Al2O3颗粒增强金属基复合材料这的原位反应过程：用X－射线衍射分析了反应过程中的相变。

Discussed element of the matrix in alloy of nickel radical high temperature through the experiment, advocate quantity element if the chromium, cobalt, tungsten, molybdenum, Tantalum, niobium, rhenium spectrum to spectral line of boracic ultimate analysis violates a condition, use matrix to match a law to undertake to matrix interference corrective, fixed appropriate analytic spectral line.

通过试验探索了镍基高温合金中基体元素，主量元素如铬、钴、钨、钼、钽、铌、铼等对硼元素分析谱线的光谱干扰情况，采用基体匹配法对基体干扰进行校正，确定了合适的分析谱线。

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。