微米级可控制粒径银粉中试制备研究

发布时间：2018-03-10 21:47

本文选题：银粉　切入点：化学还原法　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：银粉是电子工业和电气的重要材料之一,也是电子工业中应用最广泛的一种贵金属材料,是介质、电阻、厚膜、陶瓷等电子浆料的最基本功能材料。最近几年,纳米材料和纳米微粒已经成为材料科学领域的重点研究内容。其制备方法繁多,但主要采用化学还原法制备。此论文参照文献资料,通过还原剂甘油、水合肼,还原制备微米级可控小试及中试研究。研究中通过小试阶段,借助激光粒度分析,系统考察了工艺参数对银粉形貌与粒度的影响;通过中试阶段,设计出一套适合大规模生产、操作简捷、尾气吸收良好的生产设备。综合比较小试间段与中试间段实验参数对银粉粒径的影响,优化生产工艺,能够稳定生产出大批量的、粒径分布均匀的、可控制的微米级银粉。综合本次实验的所得数据,我们优化出一种最佳条件下大规模生产微米银粉的参数:取1000g标银加入1.5L浓硝酸制作硝酸银溶液。取150g聚乙烯醇、250m L三乙醇胺、1500m L丙三醇、1000g Na OH,Na OH溶液的浓度为0.11g/L。调节蠕动泵转速为20转/分,电子搅拌器速率为180转/分。按照实验步骤进行反应,可得到粒径累积分布D100.4μm、D901.8μm,也就是绝大部分粒径分布在0.4~1.8μm之间的微米级银粉。
[Abstract]:Silver powder is one of the most important materials in electronic industry and electrical industry, and it is also one of the most widely used precious metal materials in electronic industry. It is the most basic functional material of electronic paste such as dielectric, resistance, thick film, ceramics and so on. Nanomaterials and nanoparticles have become the focus of research in the field of material science. There are many methods for their preparation, but they are mainly prepared by chemical reduction. The effect of technological parameters on the morphology and particle size of silver powder was systematically investigated by means of laser particle size analysis, and a set of suitable for large-scale production was designed. A production equipment with simple operation and good tail gas absorption. The effects of experimental parameters on the particle size of silver powder in the small and medium test sections are compared synthetically, and the production process can be optimized to produce large quantities of silver powder with uniform particle size distribution. Controlled micron silver powder. Synthesizing the data from this experiment, We have optimized the parameters of large-scale production of micron silver powder under the optimum conditions: adding 1000g standard silver into 1.5L concentrated nitric acid to produce silver nitrate solution. The concentration of 150g polyvinyl alcohol 250m L triethanolamine 1,500g triethanolamine 1,500g NaOH solution is as follows. 0.11g / L. adjusting the speed of the peristaltic pump to 20 rpm, The rate of electron agitator is 180 cycles / min. According to the experimental steps, the cumulative particle size distribution D100.4 渭 m D901.8 渭 m, that is, the majority of micrometer silver powder with particle size distribution between 0.4 渭 m and 1.8 渭 m, can be obtained.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.3;TG146.32

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