新产品——钢带增强聚乙烯螺旋波纹管

钢带增强聚乙烯螺旋波纹管是一种创新的埋地排水管,把钢材的高刚度、高强度和聚乙烯的柔韧、耐腐结合在一起,突出的优点是环刚度高和节约原材料.     

浅谈炼油厂污水加药槽的腐蚀与防护

通过对奥氏体不锈钢加药槽子的腐蚀原因分析，作者王巍介绍了为什么要选择玻璃纤维增强树脂组成的覆盖层，和选用环氧玻璃钢保护层解决不锈钢腐蚀问题的具体施工方法，该方法提高了设备的使用寿命，经济效益显著，是值得推荐的方法。     

建筑墙板

1石膏建筑墙板 由石膏制成的建筑板材，其表面和边缘均由纸板粘牢，称为石膏纸板。在石膏中用玻璃纤维增强后制成的板材称为石膏纤维板。今天，不同种类的石膏纸板在房屋建筑的天花板、墙体和屋面的干法施工中被采用。不包纸板的石膏建筑墙板70年来一直作为隔断墙来使用，不过，由于在德国采用干法施工越来越普遍，这种笨重的建筑墙板逐渐被石膏纸板挤出市场，今天，它仅仅用于防火、复杂的天花板饰面或者与绝热材料混合制成节能材料。     

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。     

测量输入光窗台阶指标的指示表的选择

阐述了对近贴聚焦型微通道板像增强管中输入光窗台阶高度和平整度指标进行测量时，所用指示仪表的选择依据，并详细分析了指示表在检定过程中的误差来源，进一步计算出其合成标准不确定度和扩展不确定度，从而选定可用于测试的指标表。     

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.     

鼓式刹车片用增强纤维纳凯夫(NACF)的特性及其增强机理

鼓式刹车片用增强纤维NACF，化学成份稳定，耐热性好，是理想的石棉纤维代用品；用它配制的刹车片，μ－V特性、物理力学性能十分稳定。