铌

The structures,physicochemical properties and catalytic applications of niobic acid and niobium oxide are reviewed in this paper.

介绍了铌酸-氧化铌的结构、性质及其在多相催化反应中的研究现状及应用前景。

There are nine main producers of high quality niobium products,including ...

高科技对铌的需求和钢铁工业向优质高产方向发展，为今后铌工业的发展开辟了广阔的前景。

A first order quasi phase matched periodically poled LiNbO 3 for SHG with 6.5 μm period, 12 mm length, 10 mm width and 0.5 mm thickness has been successfully fabricated by applying an external electric field at room temperature from an high pulsed voltage generator. About 18 mW of CW 0.532 μm green light was obtained pumped by an 1.1 W of CW 1.064 μm Nd∶YAG laser with end coupling, which corresponds to 1.6% power conversion efficiency.

通过高压脉冲电场极化，制备了周期为6.5 μm、长为12 mm、宽为10 mm、厚为0.5 mm的一阶准相位匹配周期性极化铌酸锂；由1.1 W连续1.06 μm Nd：YAG激光器抽运，在5°时产生了约18 mW、0.532 μm的倍频连续绿光，其对应的二次谐波转换效率约为1.6%，二次谐波的归一化转换效率约为1.5% cm-1W-1，相当于79%的周期性极化铌酸锂的理想非线性系数。

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 niobium suboxide powder was prepared by NbH reduction Nb2O5procedure, pressing to the mould, sintering and oxidation of the niobium suboxide anode, and niobium suboxide for capacitor anode with good electrical property was obtained.

摘 要：采用NbH还原Nb2O5工艺制备低价铌氧化物粉末，经压制成型、阳极烧结、阳极氧化工艺，获得电性能优良的低价铌氧化物电解电容器阳极。

After drying at low temperature, sintering, acid-washing, water-washing,filtration and drying at high temperature. Tantalate or Niobate compound was got finally. As compared with traditional proce...

用新工艺生产的钽或铌酸盐化合物用于制备钽或铌酸盐晶体时，从根本上克服了传统方法固体粉末混料不均匀等缺点所造成的质量不稳定的问题。

There is high tantalite grade for certain large scale granite-pegmatite pattern tantalite-columbite mine in our country.

我国某大型花岗伟晶岩型铌钽矿含钽品位高居我国钽铌矿山之首。

The property of Niobium /Niobium Penoxide was studied and the hydrochemical method was chosen for preparing Nb20o ultrafine powder.

本文研究了铌／氧化铌的特性以及制备超细粉末的方法，选择了湿化学法制备超细粉末的方法。

Technology survey and development tendency investigation on tantalum-niobium hydrometallurgical extraction

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。

Phosphonic acids, hydroximic acids, arsenic acids and cationic not only have a strong collecting ability, but also have a strong collecting selectivity which is better than that of fatty acids.

认为脂肪酸类捕收剂的捕收能力较强而选择性较差，与钽铌矿物作用时生成了铁和锰的油酸盐，而不是钽铌的油酸盐。

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。