铌的

KTP crystal has a lots of outstanding properties of electro-optics, piezoelectricity, pyroelectricity and optical nonlinearity, especially it's coercive field is only a tenth of LiNbO3, so it has been used widely in the region of Quasi-Phase-Matched technology.

KTP晶体具有良好的电光、压电、热电和非线性光学特性，尤其它的矫顽场电压是铌酸锂晶体的十分之一，因此在准相位匹配技术领域得到广泛的应用。

By processing the measured data of the multispectral pyrometer at two different time, the true temperature and spectral emissivities at two different time can be simultaneously calculated.

经对国外的标准铌试样进行了测试，所得数据与国外同行的测量数据进行了比对，具有较好的一致性，实验结果表明，熔点真温计算值与生产者提供的值之差在 20K以内。

In this thesis, potassium niobate tantalate powder has been suceessfully synthesized by the effective hydrothermal method and solvothermal method; after that, high pyroelectric property 0-3 KTN/P composite material were prepared using solvent casting followed by compression moulding, taking tetragonal ferroelectric phase KTN as function phase, P as matrix phase, respectively.

本文采用高效的水热和溶剂热法合成了钽铌酸钾纳米粉体，随后以四方铁电相含量高的KTN粉体为功能相，以P为基体，用涂覆法制备出高热释电性能的0-3型KTN/P复合材料，并对粉体和复合材料的制备工艺和性能进行了相应的研究。

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。

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%。

Thus, if the faceting of Nb(111) can be induced. The performance of single atom Nb tip will be better than W tip in many applications.

因此若能在铌(111)的表面上产生皱化的现象，在各方面应用的表现上会比钨来的理想。

The substitution of alkaline-earth metals for Ni improves the photocatalytic activity of MNb2O6. After UV irradiation for 10h, the concentrations of RhB/SrNb2O6 suspension and RhB/BaNb2O6 suspension are degraded to 21% and 37%, respectively.

结果表明，碱土金属Sr、Ba对NiNb2O6中Ni的取代能很好地提高铌酸盐的光催化效果，在10h紫外光照射下能分别将RhB的浓度降解到原来的21%和37%。

ABSTRACT Lithium niobate, an excellent man-grown crystal, has many classical properties for both research and applications, such as electro-optic, acousto-optic, Thermal-optic, Piezoelectric and Photorefractive effects.

铌酸锂晶体是一种优良的人工晶体，它具有很多重要的性质如经典的电光效应、声光效应、热电效应、压电效应、弹光效应、光折变效应等等，而且在这些方面几乎都有很重要的应用。

The principles of dissolution precipitation of second phase particles and autenite grain coarsening were studied and the solubility product of NbC in austenite as function of temperature was evaluated.

研究了含铌 16 Mn钢奥氏体化过程中第二相粒子的固溶析出及阻止晶粒长大的规律，并给出了奥氏体中的 Nb C 固溶度积与温度的函数关系。

H.C. Starck produces an assortment of refractory metal powders that is unique the world over, In addition to metal powders, semi-finished and finished molybdenum, tungsten, tantalum, niobium, titanium, zirconium and nickel products and their alloys are manufactured.H.C.

H.C。 Starck是全世界独占鳌头的生产一系列各种各样难熔金属粉末的生产商。除了生产金属粉末外， H.C。 Starck也生产钼、钨、铌、钛、锆、镍等的半成品和成品加工件以及它们的合金。H.C。

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。