铌

The different opinions for the mechanism of light amplification in iron doped lithium niobate exist always.

掺铁铌酸锂晶体中的光放大机制问题一直存在不同的观点和争议。

In this paper, the researchers describe a technique in which nanowires of potassium niobate were synthesized in a special hot water solution and separated using ultrasound.

这些研究员在文章中阐述了一种技术，在这项技术中，铌酸钾纳米线被合成为特殊的热水溶液并利用超声波使其分离。

BET, acid amount and distribution of acidity of niobic acid catalysts were investigated.

测定了固体铌酸催化剂的比表面积、表面酸强度及表面酸量。

The result showed the niobic acid has high catalytic activity and stability when it is used as solid acid catalyst and support, and it can be used more widely.

结果表明，无论是作为固体酸催化剂还是作为载体，铌酸都表现出较高的催化活性和稳定性，具有良好的应用前景。

The structure and surface acidity of the niobic acids were analyzed by XRD, BET and TG/DTG.

用XRD、BET和TG/DTG对铌酸的结构特征和表面酸强度进行了分析。

A series of niobic acids at different calcination temperatures was prepared.

在不同焙烧温度下制备了一系列固体铌酸催化剂。

The paper introduced the property of the niobic acid and its usage in esterification, hydration, dehydration, et al.

介绍了铌酸(Nb2O·5nH2O)的性质及其在酯化、水合、脱水等反应中的应用。

Compared with r-Al_(2)O_(3), niobic acid is excellent in catalytic activity and stability.

当把铌酸负载在硅胶上(重量比为2.5％)时，其催化活性大大增强。

The nitration of toluene was carried out in the presence of acetic anhydride with CCl4 as solvent, 95% nitric acid as nitrating reagent, and niobic acid calcinated at 300℃ for 3 h as catalyst for 60 min at 40℃.

实验结果表明，当反应温度为40℃，反应时间为60min时，以CCl4为溶剂，以质量分数为95%的硝酸为硝化剂，在醋酐存在条件下，以经300℃焙烧3h后的铌酸作为催化剂，甲苯硝化产物中异构体的邻对比达1.26，较硝硫混酸的1.67显著降低，产物得率达99.3%。

A series of niobic tellurite glasses of 85TeO2-(15-x) Nb2O5-xB2O3-1﹪Er2O3 (TNB x=0,3,6,9,12,15,molar fraction) glasses were prepared.

制备了一系列碲铌酸盐玻璃85TeO2-(15-x)Nb2O5-xB2O3-1﹪Er2O3 (TNB x=0， 3， 6， 9， 12， 15)。

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。