Kinetics of TSCD zinc oxide nano-layer growth by modified diffuse-interface model

Deposition of zinc oxide films from aqueous solutions containing complex Zn²⁺ ions on soda-lime substrates were studied by two-stage chemical deposition (TSCD) process. It was shown that the film thickness can be controlled by the number of dipping stages. Nano-layers were produced with less than nine times dipping stages. Greater dipping numbers resulted in film thickness exceeding 100 nm. The growth rate obeyed double-stage zeroth order with respect to the concentration and first order with respect to the temperature. This rate was proportional to the difference between the temperature of the hot water and the substrate. Overall activation energy of 17.20 ± 0.42 kJ mol⁻¹ and frequency factor of 2.81 ± 0.07 μm s⁻¹ was determined for ZnO deposition. These values were attributed to two resistances. One resistance corresponded with film heat transfer mechanism. The other was attributed to species attachment to the solid substrate. A modification to the diffuse-interface kinetic model was devised for explanation of the latter. EDAX (electron dispersive elemental analysis), XRD (X-ray diffraction) and SEM (scanning electron microscopy) were used to characterize the layer formed. These methods showed that the product consisted solely of pure elliptical ZnO grains.     

金属表面柴油机油沉积物的反射红外光谱法研究

利用镜反射红外光谱法研究了ＣＣ级柴油机油中添加剂对成漆板板面漆膜组成的影响：考察了成漆板漆膜组成与Ｃａｔ．１Ｈ２活塞环台漆膜组成的相关性。试验结果对柴油机油的研制和应用有一定指导作用。     

碱性元素在蚀变岩型金矿床中的分布特征及其评价意义

本文以山东招远河金矿为例，研究了蚀变岩型金矿中碱性元素（碱金属及碱土金属）的分布特征及其与金矿化的关系，据晕内碱性元素的分布和分带性探讨了找矿评价意义。     

脉状矿床开采维护矿山整体稳定性的一般原则和方法

含金石英脉群类型的矿床，当采深达到一定程度而采空区又未进行适当处理时，矿山的整体稳定性应予以充分注意。可采取的措施和方法有：在采矿设计中，尽量改善采场围岩的应力环境；为防止岩移“突破口”的形成，处于某些关键部位的采场，应适当进行支护、充填或加固。     

A structure/function study of polyaminoamide dendrimers as silica scale growth inhibitors

Dendrimers have attracted immense attention during the last decade due to their interesting properties both from a basic and an applied research viewpoint. Encapsulation of metal nanoparticles for catalysis, drug delivery and light harvesting are only some applications of dendrimers that are breaking new ground. A novel application of dendrimer technology is described in the present paper that relates to industrial water treatment. Industrial water systems often suffer from undesirable inorganic deposits. These can form either in the bulk or on metallic surfaces, such as heat exchangers or pipelines. Silica (SiO₂) scale formation and deposition is a major problem in high‐silica‐containing cooling waters. Scale prevention rather than removal is highly desired. In this paper, benchtop screening tests on various silica inhibition chemistries are reported, with emphasis on materials with a dendrimeric structure. Specifically, the inhibition properties of commercially available STARBURST^® polyaminoamide (PAMAM) dendrimers generations 0.5, 1, 1.5, 2, and 2.5 are investigated in detail together with other commonly‐used scale inhibitors. Experimental results show that inhibition efficiency largely depends on structural features of PAMAM dendrimers such as generation number and nature of the end groups. PAMAM dendrimers are effective inhibitors of silica scale growth at 40 ppm dosage levels. PAMAM dendrimers also act as silica nucleators, forming SiO₂–PAMAM composites. This occurs because the SiO₂ formed by incomplete inhibition interacts with cationic PAMAM‐1 and ‐2. The general scope of silica formation and inhibition in industrial waters is also discussed. Copyright © 2005 Society of Chemical Industry     

珠江洲头咀河段过江隧道工程极限冲刷模拟研究

珠江三角洲河网纵横交错,网河河道的泥沙来源既有上游不同径流挟带的陆域来沙,也有潮流所挟带的海域泥沙,河道水动力和冲淤特性极为复杂。以广州出海水道上段(广州-黄埔段)为例,在分析河道不同径潮组合下河道水动力特点的基础上,采用二维潮流泥沙数学模型对工程所在河道的极限冲刷进行了模拟计算。研究表明,对于三角洲复杂网河河道,认识不同的径流条件下河道的水动力特点是研究河道冲淤特性的前提。     

青城子矿田小佟家堡子金银矿床地质特征及成矿物质来源探讨

小佟家堡子金银矿床赋存在辽河群大石桥组PtLd^5 3和PtLd^4 3的互层带之中。矿体受层间滑脱构造控制。容矿岩石以自云石大理岩和硅质岩为主，矿体呈层就、似层就。矿石中的金以不可见金为主，金古量与毒砂关系最密切。成矿物质来源于地层——即海底火山喷气和喷流作用形成含矿热卤水，经运移在海盆边缘沉积形成矿源层或维集区，经区域变质作用和岩浆作用的改造，在印支期就位。矿床成因类型为同生沉积-变质一岩浆热液叠加再造型金银矿床。     

转炉煤气风机叶轮故障诊断及处理措施

对转炉煤气风机叶轮故障进行诊断,分析了故障产生的原因,提出了处理措施,延长了设备使用寿命。     

新疆东昆仑地区金矿成矿地质条件及找矿方向初探

东昆仑地区是昆仑巨型成矿带中２个重要的成矿区之一，从大地构造背景、沉积建造、岩浆活动等成矿地质条件的分析入手，对东昆仑地区的求勉雷克成矿远景区、鸭子泉成矿远景区、库木巴彦成矿远景区和石雪尖成矿远景区的金矿成矿条件进行了初步的探讨，指出了找矿方向。