铌

The feldspars of topaz-lepidolite granite in Yashan late stage are P-rich albite and Kfeldspar, and the phosphorus goes into feldspar structure in the form of PAlSi〓 substitution. The phosphorus contents of feldspars vary according to their crystal habitus. In general, the feldspars of later generation have the higher average phosphorus content than that of earlier generation, and the albite contains higher phosphorus than the K-feldspar in the same generation. The zircon is highly rich in Hf, U, P and Al. The phosphorus enters the zircon structure mainly by the form of〓P〓〓Si〓, Al〓P〓Si〓 or P〓Al〓Si〓, Zr〓 substitution. The P-rich zircon is the production of the highly evolved magma, and it might be one of the important characteristic minerals of the high-P subtype granite. The manganocolumbite, manganotantalite, wodginite and titanowodginite are the main niobium and tantalum minerals.

雅山晚阶段黄玉锂云母花岗岩的长石矿物是富磷长石，磷以PAlSi〓替换方式进入长石结构中，并且在长石中的分布很不均一，一般是晚结晶的长石比早结晶的长石的磷含量高，同期结晶的钠长石比钾长石的磷含量高；锆石矿物为高度富铪、铀、磷和铝的锆石，磷主要以(Y， HREE， Fe)〓P〓〓〓Si〓〓、Al〓P〓Si〓〓、P〓Al〓Si〓〓Zr〓〓等替换方式进入锆石晶格中，富磷锆石是岩浆高度演化的结果，是高磷花岗岩的特征矿物之一；雅山含有丰富的磷锂铝石，是高磷花岗岩的主要磷酸盐矿物；铌—钽矿物主要有铌锰矿—钽锰矿、锡锰钽矿—钛锰钽矿、细晶石等。

Different growthing methods of lithium niobate single crystals and their respective characteristics are presented in this paper. Problems occuring in the growth process of ...

本文从晶体生长技术的角度综述了铌酸锂单晶体不同的生长方法以及各自的特点，并分析了在生长铌酸锂晶体时出现的一些问题。

With the development of photoelectron technology, the role of lithium niobate crystal is more and more important. The need of ultra-precision device, made with lithium niobate crystal, increased steadily.

随着光电子技术的发展，铌酸锂晶体在行业中的作用越来越重要，利用铌酸锂晶体制作超精密元器件的需求与日俱增。

Niobic acid and compounds containing niobium are applied in a wide range of catalysis fields for their unique acidic property and thermal stability.

铌酸和含铌化合物独特酸性和热稳定性，广泛的应用催化领域中。

Both niobic acid and niobium oxide can be used as either catalyst,promoter or support in the heterogeneous catalytic reactions,such as selective oxidation,hydration,hydrolysis,alkylation,dehydrogenation and hydrogenation,because of their acidic and redox properties.

作为一种新型的催化材料，铌酸-氧化铌由于其独特的酸性和氧化还原性正受到越来越多人的关注。它可以作为催化剂的活性组分、助剂或载体使用，在烃类转化、选择性氧化、水解、水合、缩合、加氢脱氢等若干酸碱和氧化还原反应中得到广泛的应用。

The large tantalum niobium tungsten ore pertains to the fine-grained granite deposit of albite muscovite. The useful minerals mainly consist of wolframite and scheelite, and a small number of tantalum niobite, fine spar, tantalum aeschynite, beryl, and bismuth, etc.

该大型钽铌钨矿为细粒钠长石化白云母花岗岩矿床，主要有用矿物为黑钨矿、白钨矿及少量的钽铌铁矿、细晶石、钽易解石、绿柱石和辉铋矿等。

The wolframite, scheelite, tantalum niobite and fine spar have uneven distribution in the raw ores. Relatively, the wolframite and scheelite have coarse embedded granularity, generally 0.8 ~ 0.04 mm. The tantalum niobite and fine spar have fine embedded granularity, generally 0.2 to 0.04 mm.

原矿中黑钨矿、白钨矿、钽铌铁矿、细晶石的嵌布粒度皆为不均匀嵌布，黑钨矿与白钨矿的嵌布粒度相对较粗，一般为0.8~0.04毫米，而钽铌铁矿及细晶石的嵌布粒度则很细，一般为0.2~0.04毫米。

Based on noncollinear optical parametric amplification in periodically poled lithium niobate which is realized by quasi-phase matching technology, we consider the possibility of semi-noncollinear phase matching method between collinear and noncollinear geometry.

基于周期性极化铌酸锂晶体的准相位匹配光参变放大过程，通过倾斜周期极化铌酸锂晶体中极化域一定角度，实现了介于共线匹配方式和非共线匹配方式之间的一种半非共线型准相位匹配方式，并以该匹配方式下的各光矢量几何关系得出相位匹配曲线，找到在特定抽运光和信号光波长下能获得宽带增益放大的周期极化长度。

Kinetics of reaction and process test for the direct alloying of niobium concentrate in the ladle of BOF have been done in the present work.

为开发转炉钢包中铌精矿直接合金化工艺，作者进行了铌精矿直接合金化反应动力学和工艺试验研究。

Electrochemical studies are performed to investigate the corrosion resistance of uranium niobium alloy before and after passivated with carbon monoxide.

采用电化学方法研究了铀铌合金经CO( 0 3MPa)钝化前后的电化学耐蚀性能，并用X射线光电子能谱分析了铀铌合金经CO钝化后表面层的组成。

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。