1) niobium
[英][naɪ'əʊbiəm] [美][naɪ'obɪəm]
铌
1.
Influence of carbon and niobium on microstructures and properties of Inconel 718 alloy deposit coating;
碳、铌对Inconel 718合金熔敷层组织与性能的影响
2) Nb
铌
1.
Microstructure control of low carbon Nb-microalloyed fine grained dual phase steel;
低碳含铌细晶双相钢的组织控制
2.
Influence of Nb on wear resistance of surfacing metal of high Cr cast iron;
铌对高铬铸铁堆焊层耐磨性的影响
3.
Effect of Cu and Nb on Microstructure and Mechanical Property of Multi-layer Weld Metal;
铜和铌对多层焊焊缝金属显微组织和硬度的影响
3) Ferroniobium
铌铁
1.
Research on Method for Fast Determination of Al,P in Ferroniobium;
铌铁中Al、P的快速测定方法研究
2.
Determination of multi-elements in ferroniobium by inductively coupled plasma atomic emission spectrometry
电感耦合等离子体原子发射光谱法测定铌铁中多元素
4) Niobium film
铌膜
1.
Niobium films were grown by DC magnetron sputtering on CrNi3Mo steel substrates.
利用直流磁控溅射在钢基体上沉积了铌薄膜,分别采用扫描电镜、原子力显微镜、X射线衍射仪和电化学分析仪研究了不同偏压下铌膜表面形貌、相结构以及耐蚀性。
2.
Influence of sputtering gas pressure on surface morphology, phase structure, wear resistance and corrosion resistance of niobium films has been investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), atomic force microscopy (AFM), ball-on-disc tester and electrochemical tester respectively.
采用直流磁控溅射在钢基体上制备了铌薄膜,分别采用扫描电镜、原子力显微镜、X射线衍射仪、球盘式摩擦磨损实验机和电化学分析仪研究了不同溅射气压下铌膜表面形貌、相结构、耐磨性以及耐蚀性。
5) Niobic acid
铌酸
1.
Hydrolysis of glucose solutions over niobic acid as solid acid catalyst;
铌酸催化水解葡萄糖的研究
2.
Catalytic synthesis of DnOP by niobic acid;
铌酸催化合成邻苯二甲酸二正辛酯
6) tantalum-niobium
钽铌
1.
Technology survey and development tendency investigation on tantalum-niobium hydrometallurgical extraction;
钽铌湿法冶金技术概况及发展趋势探讨
2.
The paper suggests that it is of great importance and necessity for the development and operation of tantalum-niobium resources enterprises to develop non-metal mineral product market,according to the particularity of tantalum-niobium resources and their fluctuating market.
针对钽铌资源的特殊性及市场经济条件下的起落不定,提出了拓展非矿产品市场在钽铌资源企业开发和经营理念中的异常重要性和必要性。
3.
Current situation including advantages and disadvantages of tantalum-niobium industry in china,and the influence of china's entry in to WTO on domestic tantalum-nibium industry are analyzed.
通过对我国钽铌工业现状及参与国际竞争的优势分析,加入WTO对于我国钽铌工业的主要影响,提出了我国钽铌工业的发展对策,旨在促成我国钽铌工业在激烈的国际竞争中得到长远发展。
补充资料:铌
铌 niobium 一种化学元素。化学符号Nb,原子序数41,原子量92.90638,属周期系ⅤB族。1801年英国C.哈切特从铌铁矿中分离出一种新元素的氧化物,并命名该元素为columbium(中译名钶)。1802年瑞典A.G.厄克贝里在钽铁矿中发现另一种新元素 tantalum。由于这两种元素性质上非常相似,不少人认为它们是同一种元素。1844年德意志H.罗泽详细研究了许多铌铁矿和钽铁矿,分离出两种元素,才澄清了事实真相。铌在地壳中的含量为0.002%,主要矿物有铌铁矿〔(Fe,Mn)(Nb,Ta)2Ob〕、烧绿石〔(Ca,Na)2(Nb,Ta,Ti)2O6(OH,F)〕和黑稀金矿、褐钇铌矿、钽铁矿、钛铌钙铈矿。 铌是灰白色金属,熔点2468℃,沸点4742℃,密度8.57克/厘米3 。室温下铌在空气中稳定,在氧气中红热时也不被完全氧化,高温下与硫、氮 、碳直接化合 ,能与钛 、锆、铪、钨形成合金。不与无机酸或碱作用,也不溶于王水,但可溶于氢氟酸。铌的氧化态为-1、+ 2、+3、+4和+5,其中以+5价化合物最稳定。 金属铌可用电解熔融的七氟铌酸钾制取,也可用金属钠还原七氟铌酸钾或金属铝还原五氧化二铌制取。纯铌在电子管中用于除去残留气体,钢中掺铌能提高钢在高温时的抗氧化性,改善钢的焊接性能。铌还用于制造高温金属陶瓷。 |
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