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| 高振实密度银粉的制备及后处理研究 |
| Study on preparation and post-processing of high tap density silver powder |
| Received:May 30, 2021 |
| DOI： |
| 中文关键词: 银粉 振实密度 方差分析 Minitab软件 气流粉碎 |
| 英文关键词: silver powder tap density variance analysis Minitab software jet mill |
| 基金项目: |
| Author Name | Affiliation | E-mail | | QU Xin-xin | ITP Co. Ltd., Wuxi 214192, Jiangsu, China | | | WANG Lai-bing | ITP Co. Ltd., Wuxi 214192, Jiangsu, China | 710325274@qq.com | | YANG Zhi-xian | ITP Co. Ltd., Wuxi 214192, Jiangsu, China | | | XIONG Ya-ling | ITP Co. Ltd., Wuxi 214192, Jiangsu, China | | | ZHANG Xia | ITP Co. Ltd., Wuxi 214192, Jiangsu, China | | | LU Kai-kai | ITP Co. Ltd., Wuxi 214192, Jiangsu, China | | | HANG Yun | ITP Co. Ltd., Wuxi 214192, Jiangsu, China | |
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| 中文摘要: |
| 采用液相还原法，以硝酸银为原料，抗坏血酸为还原剂，阿拉伯树胶为分散剂，运用Minitab软件中的山口实验设计和一般线性模型分析探究了反应温度、硝酸银溶液滴加时间和pH三因素对银粉振实密度的影响；并对最佳参数组合所得的样品进行气流粉碎处理，对比了气流粉碎前后银粉性质的变化。结果表明，三因子中，硝酸银滴加时间对银粉振实密度影响显著，其余两因子为非显著因子，最佳参数组合为反应温度35℃，滴加时间90 min，pH=1，最佳条件下制备的银粉振实密度为4.90 g/cm3。对该条件下的样品进行气流粉碎处理后测试分析，发现样品粒度分布减小，表面形貌比粉碎前光滑圆润，XRD半高宽变大，晶粒尺寸变小，振实密度增加到5.42 g/cm3，说明气流粉碎处理可改善银粉品质。 |
| 英文摘要: |
| Silver powder was prepared by the liquid phase reduction method using silver nitrate as raw material, ascorbic acid as reducing agent and gum Arabic as dispersant. Using the Taguchi experimental design and the general linear model of variance analysis in Minitab software, the effects of reaction temperature, dropping time of silver nitrate solution, pH value on the tap density of silver powder were studied. The silver powder obtained under the optimal combination of parameters were pulverized by a jet mill, and their properties before and after jet pulvrization were compared. The experimental results showed that dropping time had a significant effect on the tap density of silver powder, and that the other two factors were non-dominant. The optimum parameters were as follows: 35℃ of reaction temperature, 90 min of dropping time and controlling pH=1. The density of prepared silver powder was 4.90 g/cm3 under the optimum conditions. The sample under optimum conditions were tested and analyzed after jet milling. It was found that the particle size distribution of the sample was reduced. The surface morphology was smoother and rounder than before pulverization. The XRD half-height width became larger due to the decreased grain size. The tap density increased to 5.42 g/cm3, indicating that jet mill can improve the quality of silver powder. |
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