离子迁移

This paper reviews the status of research on the ion migration in solids by meansof electron microprobe techniqueconducted at our institute.

本文综述了我们用 EPMA 和 SEM 技术研究固体中的离子迁移所取得的结果。主要内容包括：(1)测定在电子束轰击下固体中可迁移离子的种类和组成的变化。

The ionic conductivity of polymer electrolytes equaled 3.56×10-4 S·cm-1 when the mass fraction of silicotungstate lithium was 8.5% in polymer film. The lithium ions transference number, which was measured by the method of combination of AC impedance with DC polarization, decreased with increase of the mass fraction of Li4SiW12O40 in the porous polymer film.

为了提高聚合物电解质的Li+离子迁移数，人们设法增大阴离子的体积[6~8]使其难以迁移而达到提高Li+离子迁移数的目的，很少应用含有多个Li+离子的锂盐做聚合物电解质的Li+离子载体。

The observed EMF values of oxygen concentration cell coincided withtheoretical values perfectly, indicating that the ceramics were purely oxide-ionicconductors with oxygen ion transference number of 1 under oxygen atmosphere over thewhole temperature range. The electrochemical oxygen permeation rates determined were inaccordance with the theoretical rates calculated from Faradays law, verifying directexperimentally that the oxide-ionic nature of the conduction under oxygen atmosphere. Athigh oxygen partialpressure range pO_2=10~(-5～10~5 Pa, they were almost pure ionicconductors, which was consistent with the result by means of oxygen concentration cell.Whereas at low oxygen partial pressure range pO_2=10~(-5～10~(-15)Pa, the samplesexhibited mixed ionic and electronic conduction.

结果表明，氧浓差电池电动势的实测值与理论值吻合得很好，氧离子迁移数为1，表明该系列样品在该温度下氧气气氛中为纯氧离子导体；氧泵实验结果进一步证实了该系列样品在氧气气氛中为纯氧离子导体；在氧分压pO_2=10~(-5)～10~5 Pa的高氧分压气氛中，电导率与氧分压变化基本无关，表明在该氧分压范围样品为纯离子导体，这与氧浓差电池电动势测定结果相吻合：在低氧分压为10~(-5)～10~(-15) Pa范围，总电导率随氧分压降低而稍有升高，表明在该氧分压范围样品为氧离子与电子的混合导体。

The ion transfer number is introduced in the formula describing the relationship between ionic limiting molar conductivity and ionic concentration based on mode coupling theory. A series of calculated for the ionic limiting molar conductivity are present.

在模式耦合理论推导的低浓度时离子摩尔电导率与离子浓度的关系式中，引入离子迁移数，提出了求离子极限摩尔电导率的新方法。

The appearance of electronic conductivity makes the ionic transference number is smaller than unity. Therefore the corresponding mole entropy of oxygen ions decreases with the oxygen partial pressure.

由于电子空穴和电子电导的出现，使得氧离子的迁移率小于1，由此计算出的氧离子迁移的部分摩尔墒随氧分压的减小而减小。

The experiment results showed that the addition of ZSM5 could improve the lithium ion transference number and enhance the ionic conductivity of PEO-LiClO4 at the same time.

利用交流阻抗-稳态电流相结合的方法对CPE的锂离子迁移数进行了测定，结果表明掺入ZSM5后锂离子迁移数明显升高。

Ion gate is one of the important parts in an ion mobility spectrometer.The main function of the ion gate is to control the ions to fly into the drift tube in pulse mode.

离子门是离子迁移谱仪的一个重要部件，主要作用是用来控制离子以脉冲的方式有效地进入迁移管。

The ion mobility was measured at different temperatures and the effects of the temperature in drift tube on the variety and yield of the reactant ions and product ion s were discussed.

本研究在不同温度下进行了离子迁移率实验，结果表明，离子迁移率随温度的升高而增大，而提高工作温度可以减少水分子对产物离子的影响，有利于改善系统检测的分辨率；选择合适漂移管工作温度，能有效地增加反应物离子的产量，从而提高系统检测的灵敏度和选择性。

The results show that the ion mobility increases as temperature rises; the influence of water vapor on product ions was reduced and the system resolution was enhanced at a higher temperature. In addition, the reactant ion yield can be effectively increased by choosing a proper temperature in drift tube, and improves the sensitivity and selectivity of system.

本研究在不同温度下进行了离子迁移率实验，结果表明，离子迁移率随温度的升高而增大，而提高工作温度可以减少水分子对产物离子的影响，有利于改善系统检测的分辨率；选择合适漂移管工作温度，能有效地增加反应物离子的产量，从而提高系统检测的灵敏度和选择性。

Ion mobility spectrometry ; ion mobility ; drift tube ; reactant ion ; product ion

离子迁移率谱；离子迁移；漂移管；反应物离子；产物离子

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。