铌

Under the optimum conditions of a cyclopentene amount of 1.0 mol, a molar ratio of cyclopentene to water of 0.25, a reaction temperature of 120 ℃, a reaction time of 4.0 h, a main catalyst dosage of 4.0 g and a cocatalyst dosage of 0.8 g, the yield of cyclopentanol reached 68.6%.

确定适宜的反应条件为：环戊烯1.0 mol，n﹕n=1﹕4，反应温度120 ℃，反应时间4.0 h，硅胶负载铌酸主催化剂用量4.0 g，三（3，6-二氧杂庚基）胺助催化剂0.8 g。在此反应条件下，环戊醇收率68.6%。

Cyclopentanol was synthesized from cyclopentene and water through hydration reaction using HNb3O8·H2O/SiO2 as main catalyst and tris(dioxa-3,6-heptyl)amine (TDA-1) as cocatalyst.

在以硅胶负载铌酸为主催化剂、三（3，6-二氧杂庚基）胺为助催化剂的作用下，以环戊烯和水为原料，通过水合加成反应合成了环戊醇。

The giant Bayan Obo REE-Nb-Fe deposit is the world's largest REE deposit,which is hosted mainly by Middle Proterozoic Na-rich rocks,dolomitic rock and K-rich slate.

白云鄂博稀土-铌-铁矿是世界最大的稀土多金属矿床之一，主要产于中元古界富钠岩石、白云岩和富钾板岩中。

The electrooptic effect of LiNbO_3 crystal is analyzed,based on which a modulator used in space polarization encoding system is designed.

对铌酸锂晶体的电光效应进行了理论分析，在此基础上设计了基于普科尔效应的空间偏振编码调制器。

9H2O, and niobium ethoxide Nb(OC2H5)5 as starting materials, ethylene glycol monomethyl ether (C3H8O2) as the solvent. 0.1BiFeO3-0.9SrBi2Nb2O9 thin films were prepared on fused quartz substrates using sol-gel processing.

9H2O和乙醇铌[Nb(OC2H5)5]作为起始原料，乙二醇甲醚[C3H8O2]作为溶剂配制掺Fe的SrBi2Nb2O9前驱体溶液，利用溶胶－凝胶法在石英衬底上制备出0.1BiFeO3-0.9SrBi2Nb2O9铁电薄膜。

As for fine-grained Ta-Nb mineral, the flotation is generally adopted, and effective collectors is fatty acids, arsenic acids, phosphonic acids, hydroximic acids and cationics.

对细粒钽铌矿，一般采用浮选，其中比较有效的捕收剂有脂肪酸类、胂酸类、膦酸类、羟肟酸类和阳离子型捕收剂。

Effect of several collectors on fersmite artificially synthesized under the condition of variable pH values and dosages were studied. The collecting characteristic of several representative collectors such as benzyl arsionic acid,α-styrolphhosphonic, diphosphonic acid, cyclic alkyl hydroximic acid and C(subscript 7-9) alkyl hydroximic acid was researched.

研究了几种捕收剂在不同pH值和不同用量条件下对人工合成的铌钙矿的捕收效果，考察了苄基胂酸，苯乙烯膦酸，双膦酸，环烷基异羟肟酸，C(下标 7~9)烷基异羟肟酸等几种代表性的捕收剂的捕收性能。

Effects of several collectors on pure ilmenorutile were studied and compared in this paper.

本文以纯铌铁金红石矿物为研究对象，介绍并比较几种捕收剂对其捕收效果的影响。

It has been found that dopants would induce low displace symmetries and stress in some degree, which resulted in inharmonic vibration of lattice and increasing diffuse.

本论文还较全面地研究了钛酸钡铁电体中掺固溶物和氧化物、尺寸效应和铌镁酸铅中Mg与Nb配比对其弥散性的影响。

Time metaphase developed crystal of acerbity lithium of magnesian niobium of tall mix into to wait, be versed in for the Chinese crystal laid a foundation in the development of 80 time.

70年代中期发展了高掺镁铌酸锂晶体等，并为中国人工晶体在 80年代的发展奠定了基础。

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。