一种新型功能材料——Ag／Si纳米复合物薄膜的结构及光学性质

采用复合靶及离子微波控制共溅射方法制备了银（Ａｇ）硅（Ｓｉ）复合物薄膜。透射电观察表明，银晶体小颗粒（１－３ｎｍ）镶嵌于非晶基体中。近紫外、可见光及近红外吸收光谱分析表明，当银含量低于５０ａｔ％时，薄膜显示典型非晶半导体光谱特征；当银含量高于５０ａｔ％时，在近紫外及可见波段显示两个吸收峰，讨论了其可能的吸收机制     

维氏硬度压痕的形状规律及特殊清况下的测试方法

通过对维氏硬度压痕的各种形状的归纳和总结，找出了其中的规律性及成因，并就其与硬度值的关系和现行曲面维氏硬度值的修正理论进行了研究，更为重要的是解决了平面试验面上曲边压痕的维氏硬度测试难题．     

磷酸盐激光玻璃中铂颗粒密度与氧化还原平衡关系的研究

用吸收光谱法研究了Ｒ２Ｏ—ＢａＯ—Ｐ２Ｏ５系统磷酸盐激光玻璃中铂颗粒密度与铭的氧化还原平衡的关系。结果表明，玻璃中铂颗粒密度随平衡向右移动而减小；玻璃中平衡随熔炼气氛中氧分压增大、熔炼温度升高而向右移动，当足够大时，铂颗粒不能形成。     

包蒸技法谈

包蒸，即是将经过刀工处理．或不经过刀工处理的原料．用所需调料拌入味以后。再用菜叶、豆腐皮、荷叶等包裹成一定的形状．然后上笼蒸熟成菜的一种方法。用这种方法成菜。具有形状美观、质感软嫩、滋润油亮等特点。代表菜有腐皮包牛肉、荷包果味肉、荷包排骨、菜包花菜、粽香三酱鸡翅、风衣海鲜饺等。     

纳米材料应用技术中常见问题随笔

17．何谓固体颗粒的表面改性?固体颗粒表面改性是指采用一定的方法对无机或有机固体颗粒的表面进行处理、精细修饰及加工，有目的改变固体颗粒表面的物理、化学性质，以满足固体颗粒加工及应用的一种技术。     

Analysis of trace mercury in water by solid phase extraction using dithizone modified nanometer titanium dioxide and cold vapor atomic absorption spectrometry

A new method for analysis of trace mercury in water samples was developed, based on the combination of preconcentration/separation using dithizone-modified nanometer titanium dioxide (TiO2) as a solid phase extractant and determination by cold vapor atomic adsorption spectrometry (CVAAS). Dithizone was dissolved with alcohol and loaded on the surface of nano-sized TiO2 powders by stirring. The static adsorption behavior of Hg2 on the dithizone-modified nanoparticles was investigated in detail. It was found that excellent adsorption ratio for Hg2 could be obtained in the pH range of 7-8 with an oscillation time of 15 min, and a 5 mL of 3.5 mol·L-1 HCl solution could quantitatively elute Hg2 from nanometer TiO2 powder. Common coexisting ions caused no obvious influence on the determination of mercury. The mechanisms for the adsorption and desorption were discussed. The detection limit (3σ) for Hg2 was calculated to be 5 ng·L-1. The proposed method was applied to the determination of Hg2 in a mineral water sample and a Zhujiang River water sample. By the standard addition method, the average recoveries were found to be 94.4%-108.3% with RSD (n = 5) of 2.9%-3.5%.     

一种制备磁性粉末的新技术--均匀颗粒成型法

采用均匀颗粒成型法（Uniform Dropler Spray-UDS）制备Fe基合金粉末，该方法制备的颗粒粒度分布均匀，性能一致，大大优于传统的粉末制备方法（如破碎法、气雾化），具有广阔的应用前景。本文分析了粉末制备过程中颗粒尺寸的影响因素，结果表明：颗粒的大小主要取决于坩埚底部小孔、坩埚内外气体压强差以及振荡频率三个独立变量。     

二价金属离子对UASB颗粒污泥的影响

分析了Mg^2 、Ca^2 、Fe^2 等二价金属离子对UASB反应器中厌氧颗粒污泥的影响。     

微焦点X射线摆式分层成像中的不完全投影研究

在现有微焦点X光辐射成像系统的基础上,提出一种新的摆动式分层成像方法,对狭长形状薄层结构样品进行无损检测,建立计算机仿真模型,验证了使用不完全投影的合理性和高效率,讨论了不完全投影中投影区域的选择原则.实际成像结果表明分布在最佳投影区域的120°投影可成功地分离出印制电路板不同层次的图像.     

Observation and Analysis of Gypsum Particleboard using SEM

The microstructures of gypsum board and gypsum particleboard were observed by SEM. The effects of retarder and waterproof agent on the shape and the average dimension of the gypsum crystal were discussed. The mechanism was investigated as well. Four typical instances, i e, the gypsum crystal shape, the gypsum combined with particles on the particles surface, the gypsum combined with particles on the wood cross section and the gypsum combined with particles inside the wood cell cavity were selected and observed. Furthermore, the agglomeration and cementation mechanism between gypsum and particle were studied.