印制电路板孔金属化相关研究

对印制电路板孔金属化所用胶体钯的性质、从废胶体钯溶液中回收金属Pd的工艺方法及染料对酸性镀铜液的均镀能力和深镀能力的影响等进行了研究。结果表明：在回收钯工艺中采用加热破胶法可使金属Pd的回收率达98．79％；添加剂对胶体钯￡电位有着直接影响，且Na2SnO4和香草醛对胶体钯的稳定性具有一定作用；并对镀层整平性和光亮性以及镀液均镀和深镀能力进行分析比较，确定了实验范围内的最佳染料添加剂是亚甲基蓝和罗丹明B，其均镀能力分别为75．05％和68．42％，深镀能力分别为85％和88％。     

The Applicability of Debye-Hückel Model in NaAl(OH)4-NaOH-H2O System

Focusing on the most important NaAl(OH)4-NaOH-H2O system in the industry of alumina production, the feasibility of establishing a calculation model of activity coefficients according to Debye-Hückel theory via the equilibrium solubility data of sodium aluminate solution is discussed in this paper. Firstly, the hypotheses for applying Debye-Hückel theory into NaAl(OH)4-NaOH-H2O system are involved and the values of parameters are determined. Then the applicability of Debye-Hückel model in NaAl(OH)4-NaOH-H2O system is testified. The results indicate that Debye-Hückel model is applicable to the establishment of calculation model of activity coefficients in NaAl(OH)4-NaOH-H2O system and the value of ?NaAl(OH)4 is estimated as 0.3595 nm.     

The Applicability of Debye-Hückel Model in NaAl(OH)_4-NaOH-H_2O System

1 INTRODUCTION NaAl(OH)4-NaOH-H2O system plays a paramount role in the industry of alumina production, and the calculation of its activity coefficients can not only aid to perfect the theory of alumina production, but also accelerate the research and the development of new technology for reducing the production cost and energy consumption. However, the solution in alumina industry has high concentration with extremely complex structure, and the properties of the solution are easily affe…     

表面活性剂强化铝酸钠溶液晶种分解的研究进展

国内外对铝酸钠溶液结构虽进行了大量的研究，但由于铝酸钠溶液性质极为特殊和品种分解过程的复杂性，导致对铝酸钠溶液晶种分子层次的分解过程的研究缺乏较统一的认识。在机理不甚明确的情况下，不同的研究者刘废过程提出了不同的强化途径。近年来，在品种分解过程添加表面活性剂成为了国内外研究的热点。笔者系统地总结了近年来铝酸钠溶液晶种分解机理以及添加表面活性剂来强化分解过程的研究成果。根据众多研究者的结论可认为，氧化铝生产过程添加表面活性剂来强化铝酸钠溶液晶种分解过程并改善其产品质量具有很大的应用潜力。     

均匀沉淀法制备单分散颗粒研究进展

均匀沉淀法在制备单分散粒子的研究中占有重要的地位。首先分析了均匀沉淀反应的反应原理，然后综述了国内外该方法在制备单分散颗粒领域取得的进展，包括沉淀剂的选择、反应物料浓度及配比、反应时间、反应温度、表面活性剂等，最后还就该方法的优点和目前该领域存在的问题进行了阐述。     

Phenomena in late period of seeded precipitation of sodium aluminate solution

1 Introduction The seeded precipitation from supersaturated sodium aluminate solution is a crucial step in the Bayer process for the production of alumina, which is a complicated crystallization operation involving a variety of physico-chemistry sub-proc…