查询词典 niobic

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%。

The effects of all kinds of factors, just like calcination temperature of niobic acid catalysts, nitration reaction time, nitration reaction temperature, recovered catalyst, acetic anhydride and concentration of nitric acid were studied by gas chromatography.

研究了催化剂焙烧温度、硝化反应时间、硝化反应温度、有无醋酸存在、硝酸浓度、催化剂的重复使用等因素对甲苯硝化反应影响。

Niobic acid as a solid catalyst can be directly applied in the hydrolysis, esterification, condensation and alkylation reaction etc.

铌酸可直接作为固体催化剂，应用于水解、酯化、缩合、烷基化等反应中；铌酸也作为载体负载金属，应用于F-T合成、氧化反应和加氢等反应中；含铌化合物也可作为负载型催化剂，负载到不同类型的载体上；含铌化合物也作为助剂或光催化剂，广泛地应用于催化多种化学反应。

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)。

This article is divided into seven parts, the first part is the structure of LiNbO ; The second part is the basic physical property (especially for optical property); The third project is for the mix substance which takes some operation for LiNbO crystal; The 4th and 5th part for cyclical polarization niobic acid lithium crystal synopsis and application; The sixth part for Laman spectrum synopsis and the seventh part is the something about experiment.

本文共7部分，第1部分为铌酸锂晶体的结构；第2部分为基本物理性质；第3部分为铌酸锂晶体的掺工程；第45部分为周期极化铌酸锂晶体的简介及应用；第6部分为拉曼光谱简介；第7部分为实验部分。

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。

Finally,We investigated the non-resonant ultrafast 3~order nonlinear optical properties of niobic tellurite glass(80TeO_2-20Nb_2O_5)doped with silver chloridenanocrystals.

最后，我们研究了掺杂1%浓度氯化银纳米晶体碲铌氧化物玻璃的非共振三阶非线性光学特性。

This article is divided into seven parts, the first part is the structure of LiNbO ; The second part is the basic physical property (especially for optical property); The third project is for the mix substance which takes some operation for LiNbO crystal; The 4th and 5th part for cyclical polarization niobic acid lithium crystal synopsis and application; The sixth part for Laman spectrum synopsis and the seventh part is the something about experiment.

本文共七部分，第一部分为铌酸锂晶体的结构；第二部分为基本物理性质；第三部分为铌酸锂晶体的掺工程；第四五部分为周期极化铌酸锂晶体的简介及应用；第六部分为拉曼光谱简介；第七部分为实验部分。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。