松香及其衍生物在浮选分离中的应用

介绍了松香的来源、化学组成及理化性质；讨论了松香及其衍生物在非硫化物矿浮选分离、有色金属离子的浮选分离以及从水溶液中浮选分离有机物等方面的应用情况。     

铁电体尺寸对其开关特性的影响

应用铁电体极化反转的Orihara Ishibashi理论 ,讨论了圆形铁电薄膜和球形铁电体的开关电流以及开关时间对系统尺寸的依赖性。数值计算表明 ,不论是二维还是三维铁电系统 ,其铁电畴反转过程中产生的开关电流都随系统尺寸减少而下降 ,开关时间随系统尺寸减少而缩短     

铣槽专用夹具设计

从零件的几何形状 ,配合要求入手 ,设计零件铣槽的专用夹具     

二钼酸铵(ADM)非团聚晶体的生成试验

探讨了二钼酸铵非团聚晶体生成的机理及制取新工艺。采取该工艺制取的ADM费氏粒度（Fsss)约30μm，激光粒度分布d0.5为370μm，松装比达1.37/cm^3。     

影响凹印铜金粉印金光泽度的主要因素

在研究国内外铜金粉的微观形貌、厚度、水面遮盖率、定向排列、光泽度和粒度分布的基础上，分析了影响凹印铜金粉印金光泽度的主要因素。结果表明，国产铜金粉颗粒级差大、细小颗粒所占比例过多、金属片太厚、水面遮盖率小、定向排列不好等是影响国产铜金粉印金光泽度的主要因素。     

小型办公网络组网

通过实例,对小型办公网络组网中涉及到的需求设计、网络连接、网络设备、设备连接等进行了论述。     

Synthesis and activation of Pt nanoparticles with controlled size for fuel cell electrocatalysts

Well-dispersed Pt nanoparticles with controlled size and narrow size distribution were prepared by polyalcohol reduction of platinum acetylacetonate, using oleylamine as a capping agent. The particle size was varied from 3.5 nm to 11.5 nm by decreasing the amount of oleylamine added in the synthesis. Size selection of the as-prepared particles by solvent fractionation yielded nearly monodispersed Pt particles. The as-prepared particles were loaded on a carbon support by physical deposition, but showed no electrocatalytic activity due to the oleylamine bound to the particle surface. The particles were activated for electrocatalysis after heating the particles in air at 185 °C for 5 h, conditions that gave no particle-sintering and no oxidation. Cyclic voltammetry showed that the particles after the heat treatment in air were electrocatalytically active for methanol oxidation. The smaller 3.5 nm and 4.0 nm Pt particles had a higher intrinsic activity for methanol oxidation, but a lower tolerance to CO poisoning, compared with 6.0 nm, 9.5 nm and 11.5 nm particles. CO-stripping results suggest that CO is more easily oxidized on larger Pt particles.     

高压水射流粉碎原盐

高压水射流粉碎技术是近年发展起来的一项新型粉碎技术。文中介绍了水射流粉碎机理和新研制的后混合靶式水射流粉碎装置 ,并通过原盐粉碎实验证明 ,水射流粉碎具有效率高、工艺简单、产品粒度可调等特点 ,是一项具有良好发展前景的粉碎技术。     

Electrical and optical studies of ZnO:Ga thin films fabricated via the sol–gel technique

The effects of dopant (Ga) concentration, post-heat treatment temperatures, and different heat treatment environments on the morphology, electrical and optical properties of ZnO films were studied. ZnO films doped with Ga are derived from non-alkoxide zinc acetate via the alcoholic route by a sol–gel dip-coating technique. Introduction of Ga, as a dopant, can reduce crystallite size, which is attributed to the increased number of nucleation centers. Grain growth was also observed at high post-heat treatment temperature. It was discovered that different post-heat treatment environments (air or reduced atmosphere) did not change the structure orientation, microstructure shapes and size. It was found that the sheet resistance, R_s could be reduced by an order of magnitude, using post-heat treatment in reduced atmosphere (4%H₂–96%N₂).     

纳米氧化铝的制备及应用

介绍了高科技产品纳米氧化铝的 3大制备方法 :固相法、气相法、液相法的优缺点 ,以及纳米氧化铝的应用与发展前景