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| 球磨法对氧化铝镀银材料导电性能的影响 |
| The effect of ball milling on the conductivity of silver plated on the surface of alumina |
| Received:July 20, 2022 |
| DOI： |
| 中文关键词: 球磨法 氧化铝 镀银 导电材料 |
| 英文关键词: ball milling alumina electroless silver plating conductive materials |
| 基金项目:湖北省教育厅科学研究项目(B2020198)；荆楚理工学院科研项目(ZD202106)；荆门市科技局项目(2018YFYB048)；荆楚理工学院大学生创新创业训练项目(KC2022033，KC2022036，KC2022037) |
| Author Name | Affiliation | | CHEN Yong | College of Chemical Engineering and Pharmacy, Jingchu University of Technology, Jingmen448000, Hubei, China | | SONG Xiaoqi | College of Chemical Engineering and Pharmacy, Jingchu University of Technology, Jingmen448000, Hubei, China | | XIONG Hangxing | College of Chemical Engineering and Pharmacy, Jingchu University of Technology, Jingmen448000, Hubei, China | | YANG Shiyu | College of Chemical Engineering and Pharmacy, Jingchu University of Technology, Jingmen448000, Hubei, China | | XIONG Yi | College of Chemical Engineering and Pharmacy, Jingchu University of Technology, Jingmen448000, Hubei, China | | CHEN Xuanqi | College of Chemical Engineering and Pharmacy, Jingchu University of Technology, Jingmen448000, Hubei, China | | ZHU Qiong | Hubei Benxin Environmental Protection Hi-tech Co.Ltd., Wuhan 430074, China |
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| 中文摘要: |
| 使用球磨法对氧化铝镀银材料进行改性，最佳的工艺为:氧化铝与玛瑙球的重量比为20%，球磨频率为5.5 Hz，球磨时间为3 h，最高导电率为1887 S/cm，比未球磨的提高37倍。通过红外光谱仪、X射线衍射仪、热失重仪、偏光显微镜和悬浮测试了氧化铝镀银材料的性能，结果表明:球磨对氧化铝红外光谱没有影响，镀银后氧化铝的红外吸收振动峰消失；X射线衍射证明氧化铝镀银材料中有银的晶体峰出现，没有其它杂质峰；热失重表明镀银材料的残留变大，耐热性能提高；偏光显微镜显示球磨后氧化铝为片型结构，大小分布均匀；镀银材料悬浮溶液颜色较深，能够悬浮于乙醇溶液中，有望提高在高分子复合材料中的分散性能。最后阐述了球磨使得氧化铝大颗粒被破碎以及颗粒被磨削这两种作用，形成片，增加了表面积和包银效率，提高了颗粒之间导电网络的连接，使得导电率变大的机理。该导电材料期望在电磁屏蔽、导电胶粘剂和抗菌复合材料等诸多领域都有广泛的应用前景。 |
| 英文摘要: |
| The conductivity of silver plated on the aluminum oxide, a kind of composite material, was modified by ball milling. The best process was as follows: the weight ratio of Al2O3 to agate ball was 20%, the ball milling frequency was 5.5 Hz, the ball milling time was 3 h. The highest conductivity increased 37 times afer ball milling, reaching 1887 S/cm. The structure and properties were tested by infrared spectrometer, X-ray diffraction, thermogravimetric analyzer, polarizing microscope and suspension. The results showed that ball milling had no effect on the infrared spectrum of alumina, but the infrared absorption peaks belonging to alumina disappeared after silver plating. There were only silver crystal peaks in X-ray diffraction diagram of the composite material. As evidenced by thermogravimetric analysis, the residual of the composite material increased and heat resistance was improved. Polarizing microscope implied that the alumina after ball milling dispalyed a flake structure with uniform size distribution. The composite material could be suspended in ethanol, forming a dark suspension solution, a faverable profile which was expected to improve its dispersion performance in polymer. Finally, the effects of the ball milling on the composite material could be explained by two mechanisms, namely fragmentating large alumina particles and grinding small particles, resulting in the formation of falkes which can increase surface area and silver coating efficiency and improve the conductivity of the material via increasing the connection of conductive network among the particles. The conductive composite material is expected to be useful in many fields such as electromagnetic shielding, conductive adhesive and antibacterial material. |
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