Yu Zhiheng, Zhang Tiancheng, Li Kaifeng, Huang Fengli, Tang Chengli
College of Mechanical and Electrical Engineering, Jiaxing Nanhu University, Jiaxing 341000, China.
Zhejiang Key Laboratory of Medical Electronics and Digital Health, Jiaxing University, Jiaxing 314001, China.
Nanomaterials (Basel). 2022 Feb 6;12(3):560. doi: 10.3390/nano12030560.
Improving the conductivity of metal particle inks is a hot topic of scientific research. In this paper, a method for preparing metal-filled particles was proposed. By adding filled particles to the ink, the size distribution of particles could be changed to form a bimodal distribution structure in accordance with Horsfield's stacking model. The filling particles had small volume and good fluidity, which could fill the gaps between the particles after printing and improve its electrical conductivity without significantly changing the metal solid content in the ink. Experimental results show that the silver content of the ink slightly increased from 15 wt% to 16.5 wt% after adding filled particles. However, the conductivity of the ink was significantly improved, and after sintering, the resistivity of the ink decreased from 70.2 μΩ∙cm to 31.2 μΩ∙cm. In addition, the filling particles prepared by this method is simple and has a high material utilization rate, which could be applied to the preparation of other kinds of metal particle inks.
提高金属颗粒油墨的导电性是科研热点。本文提出一种制备填充颗粒金属的方法。通过向油墨中添加填充颗粒，可改变颗粒尺寸分布，依据霍斯菲尔德堆积模型形成双峰分布结构。填充颗粒体积小、流动性好，印刷后可填充颗粒间间隙，提高其导电性，且油墨中金属固体含量无显著变化。实验结果表明，添加填充颗粒后，油墨银含量从15 wt%略微增加至16.5 wt%。然而，油墨导电性显著提高，烧结后，油墨电阻率从70.2 μΩ∙cm降至31.2 μΩ∙cm。此外，该方法制备填充颗粒简单，材料利用率高，可应用于制备其他种类的金属颗粒油墨。
