铌

In order to find new pegmatite Nb-Ta ore-deposit, it is very important practical-significances to ascertain the host structure characteristics and the relations between the tectonic epochs and ore-forming.

通过查明矿床的容矿构造特征以及构造期次与成矿的关系，对寻找新的铌钽伟晶岩矿床具有重要的实践意义。

The leaching mechanism of niobium from a refractory niobium-tantalum ore by concentrated potassium hydroxide was studied.

实验研究了难分解铌钽矿在高浓度氢氧化钾溶液中浸出过程的机理。

KTP crystal has a lots of outstanding properties of electro-optics, piezoelectricity, pyroelectricity and optical nonlinearity, especially it's coercive field is only a tenth of LiNbO3, so it has been used widely in the region of Quasi-Phase-Matched technology.

KTP晶体具有良好的电光、压电、热电和非线性光学特性，尤其它的矫顽场电压是铌酸锂晶体的十分之一，因此在准相位匹配技术领域得到广泛的应用。

By processing the measured data of the multispectral pyrometer at two different time, the true temperature and spectral emissivities at two different time can be simultaneously calculated.

经对国外的标准铌试样进行了测试，所得数据与国外同行的测量数据进行了比对，具有较好的一致性，实验结果表明，熔点真温计算值与生产者提供的值之差在 20K以内。

This is the selenide which possesses the largest Metal/Non-metal ratio in ternary layered Nb/Ta selenides found so far.

〓 这是迄今得到的金属含量最高的三组元层状铌、钽硒化物。

Typical application: Co-WC powder, chrome oxide powder, Lead sesquioxide powder, Chromium carbide powder, zirconium oxide powder, Ni Base Alloy-Chromium Carbide,etc.

典型应用：钴碳化钨粉、氧化铬粉、三氧化二铅粉、碳化铬粉、氧化锆粉、镍铬碳化铬粉、钴铬铌钇粉等。

Oxidation-resistant silicide coatings on an Nb-based alloy were prepared by pack cementation technique. The holding temperatures were 1 050, 1 150 and 1 250 ℃ and the holding time were 2, 5, 10, 15 and 20 h, respectively.

摘 要：利用包埋渗法在铌基合金上制备抗氧化硅化物涂层，渗硅温度分别为1 050、1 150和1 250 ℃，渗硅时间分别为2、5、10、15和20 h。

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。

Stainless steel had a good antic-corrosive performance in alkalic solution and sodium carbonate containing uranium solution.

铀铌合金在环境气氛中有良好的的抗腐蚀性能。

ICP-AES determination of Nb and Ta in products from oredressing of spodumene was reported in this paper.

用碘化铵灼烧，氢氟酸-硫酸分解矿样，不经分离，电感耦合等离子体光谱法测定锂辉石选矿产品中铌和钽。

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。