薄膜

In this dissertation,Co-Cr2O3 and Fe-Cr2O3 granular films with superiorproperties have been successfully fabricated by RF co-sputtering technique underroom and 77K substrate temperatures for the first time.The microstructure,electrical transport and magnetic properties as well as their relation to TMR effectare systematically investigated by various techniques such as X-Ray diffraction,transmission electron microscopy,electrical diffraction,X-Rayphotoelectron spectroscopyand VSM,etc.,the change of electrical transportand magnetic properties in these films with their microstructure is also shown.Someinteresting and valuable results have been obtained after the theoretical fitting ofexperimental data with the existed theory.The temperature dependence of TMReffects in these films and the way to get larger TMR effect is also studied.Our mainprincipal results obtained are as follows:(1)Microstructure and Magnetism

在本论文中，我们采用射频共溅射方法，在室温及77K的衬底温度下首次成功地制备了性能优异的Co-Cr2O3及Fe-Cr2O3系列颗粒薄膜，并利用X-Ray衍射、透射电镜、电子衍射、X-Ray光电子谱及宏观电性及磁性测量等手段详细地研究了Co-Cr2O3颗粒膜的微结构、电性、磁性及它们与TMR效应之间的关系，系统地研究了薄膜的电性和磁性随薄膜微结构的变化，通过实验数据点的理论拟合，得出了一些有价值的物理信息，探讨了磁电阻效应的温度依赖性及获得较大TMR效应的途径，主要内容可概括如下

Seven polyimides were synthesized and their films were uniaxially stretched to observe the variation in their in-plane birefringence. The creep method of DMA was used instead in stretching the PI films. The preload force and isothermal temperature were the two controlled factors that were chosen on the basis of the lowest stretchable force and lowest temperature for each PI structure. The elongation ratio of a PI film was then decided by the stretching time.

在此是以DMA 的另一种试片拉伸方式-Creep模式，来取代之前的Stress Relaxation模式对PI薄膜试片进行拉伸实验，Creep模式是以最低的拉伸力量及最低的拉伸温度的前提下，选择Pre-load Force与Isothermal Temperature这二项为拉伸控制因素，在此状态下的PI薄膜拉伸比是取决於其拉伸的时间，此种拉伸模式将可得到较高的拉伸比，而高的拉伸比是获取较高薄膜双折射率的必要条件。

The porosity of the aerogel films is 56%, 16% higher than that of the xerogel films when dried at 120℃.

研究结果表明，常压干燥制备的薄膜孔隙率达到了56%，比干凝胶薄膜提高了16%，而且比容量达到530mAh/g左右，比干凝胶薄膜提高了33%，可逆性也得到了改善。

Solar cell of silicon -membrane type is therefore regarded as the development direction for the future. Solar cell of noncrystal silicon -membrane type will play it s important role, with continual betterment. And solar cell of nanosilicon membrane type will also take an main part because of it s advantage.

非晶硅薄膜太阳能电池虽在性能上具有不少的缺点，但是随着薄膜沉淀技术的提高以及工艺上的不断改进会使它在太阳能领域在有一席之地，后起之秀纳米硅薄膜太阳能电池依靠其本身的优越性以及纳米技术的进展将会成为一个重要的竞争者。

The grain size of the films increased with the increase of substrate temperature, deposition time and atomizing rate of precursor.

基片温度对薄膜的组成影响较大，高沉积温度会导致LaNiO〓薄膜的分解，使薄膜的电阻率异常增大。

Advances of extrusion equipment for plastics film, including blown film lines, biaxially oriented film lines, calendered film lines and various accessories such as dies,air rings,screenchangers,melt bumps, are introduced.

介绍了近年来塑料薄膜生产设备的最新进展，包括挤出吹塑薄膜设备、双向拉伸薄膜设备、流延设备以及各种辅机，包括机头、风环、牵引、换网器等的技术进展。

IR spectrum by force to discover around 393 Nm, the Si with the compound and filmy Ti3+/SiO2 that MTES decorates, the absorption of OH peak intensity is filmier than Ti3+/SiO2 reduce slightly, si, O, the absorption of Si the peak increases apparently, show structure of network of oxygen of compound and filmy silicon is more regular, the film of even and dispersive.

IR光谱发现，MTES修饰的Ti3+/SiO2复合薄膜的Si—OH的吸收峰强度比Ti3+/SiO2薄膜的略减小，Si—O—Si的吸收峰明显增强，表明复合薄膜硅氧网络结构更规则，有利于Ti3+的均匀分散。

Preparation and microstructure GAMs were successfully embedded in SiO〓 thin film by magnetron r. f. cosputtering technique. The microstructure of thin films were characterized by XRD and TEM.

一、薄膜的制备和显微结构采用射频磁控共溅射法成功地制备了GaAs颗粒均匀地弥散在SiO〓介质中的薄膜，薄膜中GaAs颗粒所占的体积分数高达15％以上，GaAs颗粒的平均直径为纳米量级。

New metalized films were obtained by the reduction of ABS/metal salt chelate films with NaBH_4 aqueous solution.

此时薄膜极易剥落，然后将薄膜裁成3cm×1cm的试样，在一定浓度NaBH_4水溶液中还原一段时间后，即制得表面金属化ABS导电薄膜。

The infrared-transmitting mulches provide the weed control properties of black mulch and are intermediate between black and clear mulches in terms of increasing soil temperature.

红外线透性薄膜有黑色薄膜那种控制杂草的特性，在增加土壤温度方面介于黑色与透明薄膜之间。

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。