碲的

A novel Er3+-doped tellurite glass with compositions of TeO2-ZnO-Na2O-Bi2O3 was prepared, and the intensity parameters, spontaneous emission probability, absorption and emission cross-section of Er3+ ions were calculated according to the Judd-Ofelt and McCumber theory.

研制了一种新型掺铒碲酸盐玻璃TeO2-ZnO-Na2O-Bi2O3，利用Judd-Ofelt和McCumber理论计算了Er3+离子的强度参数、自发辐射几率、吸收截面和发射截面等光谱参数。

Many sulphides, selenides, and telluides have the nickel arsenide, NiAs, type of structure.

许多硫化物、硒化物和碲化物具有砷化？？iAs型的结构。

Many sulphides, selenides, and telluides have the nickel arsenide, N iAs , type of structure.

许多硫化物、硒化物和碲化物具有砷化？？ ias 型的结构。

Many sulphides, selenides, and tellurides have the nickel arsenide's NiAs type of structure

许多硫化物，硒化物和碲化物具有砷化镍NiAs型的结构。

The tellurium coating is often used to solve the leakage problem of cylinder blocks and heads.

碲涂料常被用于解决缸体和缸盖铸件的渗漏问题，但研究发现，碲对铸铁的石墨形态和基体组织有影响，因而会影响铸铁的力学性能。

First, some critical problems in crystal growth like crystal seeding, Zn dephlegmation, geometrical selection and temperature fields are discussed in theory, and the possible kinds of defects appeared in crystal growth progress and the reasons are carefully researched. To control the concentration of Cd vacancies, a new method by which the Cd vacancies were compensated with excess Cd in the Cd rich starting materials has been developed, and a new kind of two-area tube furnace with good linear temperature distribution was designed.

首先，本文从理论上对坩埚下降法生长碲锌镉单晶体中的成核、Zn分凝、几何淘汰生长与温场等关键性问题进行了讨论，对在生长过程中可能出现的各种缺陷类型和形成原因进行了详细分析，提出了碲锌镉单晶体生长过程中Cd空位缺陷控制原理及方法，并针对坩埚下降法生长特点自行设计了两区域独立加热管式生长炉，获得具有较好线性分布的温场。

Low valent selenium and telluronium compounds have high reducing selectivity to be used to form carbon-hydrogen bonds as special reducing reagents.

低价硒、碲化合物具有良好的还原选择性，可用于多种碳-氢键的形成，碲叶立德和α-芳硒基取代的胂叶立德均可发生Wittig型反应，是形成碳-碳双键的重要方法。

Low valent selenium and telluronium compounds have high reducing selectivity to be used to form carbon-hydrogen bonds as special reducing reagents.

低价硒、碲化合物具有良好的还原选择性，可用於多种碳-氢键的形成，碲叶立德和α-芳硒基取代的胂叶立德均可发生Wittig型反应，是形成碳-碳双键的重要方法。

The morphologies of the CdZnTe etch pits developed by four etchants including Nakagawa, Everson, EAg1 and EAg2 solutions are studied. The results show that the etch pits of EAg2 etchant on the (111) B surface are flat-bottomed. And the etch pits of Everson etchant on (111) B include flat-bottomed pits and pyramidal pits with different slant directions, while the positions of pyramidal pits don′t move as the surface layer is continuously removed.

对碲锌镉晶体常用的Nakagawa、Everson、EAg1和EAg2四种腐蚀剂在碲锌镉材料（111）晶面上的腐蚀坑坑形进行了研究，结果发现，EAg2腐蚀剂在（111）B面上的腐蚀坑为平底坑，Everson腐蚀剂在(111)B面上产生的腐蚀坑包括平底坑和带有不同倾斜方向坑底的三角锥形坑，进一步的研究还表明，三角锥形坑并未沿着坑底的倾斜方向向下延伸。

Nanocrystalline copper tellurides Cu〓Te〓 and Cu〓Te〓 have been successfully prepared in ethylenediamine and ethylenediamine with hydrazine hydrate system under high-intensity ultrasonic irradiation at room temperature respectively. Nanocrystalline silver tellurides Ag〓Te and Ag〓Te〓 have been successfully prepared in ethylenediamine and ethanol system under high-intensity ultrasonic irradiation at room temperature respectively.

在制备碲化铜时，在纯乙二胺体系超声辐射所制备的最终产物为Cu〓Te〓，而在加有水合肼的乙二胺中制得的产物为Cu〓Te〓；在制备碲化银时，在乙二胺体系制备的产物为Ag〓Te，而在乙醇体系制备的产物为Ag〓Te〓。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。