杂质

The simulation of Fe doped sphalerite (110) surface and Cu adsorption on the sphalerite surface were performed by using plane wave-pseudopotential approach based on density-functional theory.

摘 要：采用基于密度泛函理论的平面波赝势法对含铁杂质闪锌矿(110)表面电子结构及铜在闪锌矿表面的吸附进行模拟。

A degraded and squalid class or state of human existence.

杂质和污染对退化的作用不能忽视。

Pit formed in stamper molding, is the smallest thing on the stamper. It's as small as smog particle, which means that even the smallest impurity can damage large amounts of data.

在制主片过程中形成的 pit，是所有制作形成物中最微小的，每一个只有烟雾的颗粒大小，这就意味着最微小的杂质也会损坏大量资料。

Lead, arsenic, stibium and bismuth were determined by inductively coupled plasma atomic emission spectrometry in hydrochloric acid medium.

铜精矿经硝酸缓慢溶解，在氨性溶液中，以氢氧化铁和氢氧化镧作载体一次共沉淀铅、砷、锑和铋，并与铜等元素分离，在盐酸介质中用电感耦合等离子体原子发射光谱法测定铜精矿中的铅、砷、锑、铋杂质元素。

The study of the mineralogy indicates:(1)Few impurity and poor sulfur in thestibnite of Shalagang antimony.(2)From the stibnite's cell parameter, it finds that thecell parameter of Shalagang antimony's stibnite approachs the standard value. And iteduces the forming temperature of the stibnite is between 150℃～200℃.(3)Thequartz in different period have different thermoluminescence curve, and thethermoluminescence curves of the quartz in rich ore havethe characters of gently curve, unconspicuous peak and the luminous intensity has therelationship of positive correlation with the temperature.

矿物学研究发现：(1)沙拉岗锑矿床辉锑矿以所含杂质少，贫硫为主要特征；(2)利用晶胞参数测定得出，沙拉岗锑矿床辉锑矿晶胞参数接近于标准值，推算形成温度在150℃～200℃之间；(3)不同期次石英具有明显不同的热释光曲线，其中主成矿期石英的热释光曲线以发光曲线平缓，峰位不明显，发光强度随温度升高而增强为特征。

The optimal processing conditions are as follows: roasting temperature at 1 000℃, roasting time for 40 min, the ratio of NbH dosage to theoretic dosage at 1.1. The specific capacity of niobium suboxide of preparation by agate grind procedure is 69.50 mF·V·g-1, the loss is 11.25%, the leakage current is 1.8×10-4A·F-1·V-1, and the electrical properties are better than that of the national standard (GB/T 3136-1995) of FTa16-300 tantalum powder for capacitor.

用正交试验法及方差分析对玛瑙研磨工艺进行优化，得到制备低价铌氧化物最佳条件是：焙烧温度为1 000℃，焙烧时间为40 min， NbH用量与理论量之比为1.1，所制得的产物杂质含量低，比容为69.50mF·V·g-1，损耗为11.25%，漏电流为1.8×10-4A·F-1·V-1，其电性能指标高于FTa16—300电容器钽粉国家标准(GB/T 3136—1995)所规定的值。

The blocking mechanism in Well 8010 of Subsalt reservoir, Kenjiyak Oilfield, has been studied by separating the components of stemming with organic solvent, and the composition of inorganic impurity is analyzed by X-ray diffraction.

为探讨肯基亚克油田盐下油藏8010井井筒的堵塞机理，利用有机溶剂对井筒的堵塞物各组分进行了分离，并利用X射线衍射分析技术分析了无机物杂质的组成。

The results show that the impurity formation energy of substitutional P in γ-matrix atom is lower than that of interstitial one.

结果显示磷在镍基体中以代位方式固溶的杂质形成能低于间隙方式，说明磷在镍基体中更易以代位式固溶。

The determination of the content of iron and copper in the sulfuric acid by FAAS is described in this paper.

在生产硫酸过程中，由于矿源、管道、设备等方面的原因，铁、铜是较容易夹带到产品中的杂质[1]。

Upwash pressure screen is mainly used for screening of the light and heavy sundries in the pulp.

升流式压力筛，主要用于筛除纸浆中的轻、重杂质。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。