Hydrogenation Properties of Zr Films Under Various Conditions of Hydrogen Plasma

The hydrogenation properties of Zr samples with and without an Ni overlayer under various plasma conditions were investigated by means of non-Rutherford backscattering and elastic recoil detection analysis.The theoretical maximum hydrogen capacity,66.7 at%,could be achieved at a hydrogen absolute pressure of-2Pa and a substrate temperature of-393K for a plasma irradiation of only 10min;this was significantly greater than that for gas hydrogenation under the same hydrogen pressure and substrate temperature.It was also found that the C and O contamination on the sample surface strongly influences the hydrogenation,and that the maximum equilibrium hydrogen content drops dramatically with the increasing total contamination.In addition,the influence of the Ni overlayer on the plasma hydrogenation is discussed.     

A Calculation Approach to Elastic Constants of Crystallines at High Pressure and Finite Temperature

Elastic constants of Na and Li metals are calculated successfully for temperatures up to 350K and pressures up to 30GPa using a scheme without involving any adjustable parameter.Elastic constants are assumed to depend only on an effective pair potential that is only determined by the average interatomic distance.Temperature has an effect on elastic constants by way of charging the equilibrium.The elastic constants can be obtained by fitting the relationship between total energy and strain tensor using the new set of lattice parameters obtained by calculating displacement of atoms at the finite temperature and at a fixed pressure.The relationship between the effective pair potential and the interatiomic distance is fitted by using a series of data of cohesive energy corresponding to lattice parameters.     

温度测量装置的控制方法

在现代工业生产中，温度测量装置的使用十分广泛。在许多场合如热处理、热加工、温度实验等都需要严格的控温条件，才能保证产品的质量。因此，对使用中的温度测量（或控制）装置必须进行控制，确保其可靠性。温度测量装置属于计量器具，应遵循我国《计量法》的规定定期周检，但是在实际工作中，情况往往比较复杂，需区别对待和处理。温度测量装置有许多种类，具体的控制方法大体有两类：1.送实验室周检；2.现场校准。周检法用于能运送到实验室的有适用检定规程的温度测量装置，如常用的XCT型动圈式温度指示调节仪（适用国家计量检定规程J…     

导电聚苯胺在微波场中的升温特性

本文研究了微波辐照下导电聚苯胺的升温特性。研究表明 ,导电聚苯胺在微波场中具有快速升温的特点 ,升温速度与掺杂剂的种类、掺杂酸的浓度、聚苯胺的导电率、合成聚苯胺的温度等因素有关。盐酸掺杂聚苯胺热稳定性较差 ,在微波场中不能反复升温 ,而热稳定性较好的DBSA掺杂的聚苯胺具有一定的反复升温能力     

激光散射及光电子技术对液晶特性的测试

激光散射和光电子技术是目前测试液晶特性最先进和可靠的手段.此技术通过静态光散射和动态光散射两种测试方法,测得液晶的分子量、浊度系数、相关长度、相变温度、展矩和扭矩等许多物理参数,因此可判断液晶的类型,了解液晶的结构、形态,相转移及动态变形的过程,为液晶在许多领域的应用提供可靠的理论依据.     

亚皮秒光脉冲在密集色散管理光纤中的传输特性

文章从包含高阶效应的非线性薛定谔方程出发,基于一种二阶和三阶色散都作了完全补偿(零路径平均色散)的光纤级联系统模型,用数值法对亚皮秒(几百飞秒)高斯光脉冲在密集色散管理光纤(放大周期远远大于色散补偿周期,La>>Lc)中的传输特性做了研究.结果表明啁啾化亚皮秒光脉冲在短周期色散补偿光纤中可以实现稳定传输.色散管理的密集化程度越高,即色散补偿周期越短,光脉冲在光纤中传输时的呼吸度越小,前后脉冲间的相互作用也越弱,有利于提高光纤传输系统的性能.此外,由于色散管理孤子的系统功率较小,因此高阶非线性项的影响不大.     

Growth of NaBi（WO4）2 Dendrite and Mechanism

The solid-liquid interface motion of NaBi（WO4）2 （NBWO） melt crystal growth is observed in an in situ system, in which the whole processes of interface transition from fiat interface and cellular to dendrite are visualized. The spacing of the dendrite under smaller temperature gradient turns out to be larger than that under larger temperature gradient, which is found to be sensitive to the temperature distribution. The mechanism of dendrite growth of NBWO is studied based on the model of the growth units of anion coordination polyhedra. The { 001} face has two apex links, so it shows higher stability and has high growth rate and forms the arm of dendrite, whereas the {010} face has only one apex link, and thus shows relative slower growth rate and firstly forms the branches.     

q变形对相干态的相位概率分布特性

通过推广Pegg和Barnett的相位算符和相位态到q变形的双模情况, 应用数值计算 研究了q变形对相干态的相位概率分布特性. 结果表明, q变形对相干态的相位概率分布受到相位参数、q参数和参数│ξ│的调节, 从而反映出不同的量子相干特性.     

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