气溶胶喷射打印系统成形宽度影响因素分析

在分析气溶胶喷射打印技术工作原理的基础上，利用商用压电陶瓷雾化片和自行设计制造的喷印头，构建出由气溶胶喷射打印装置、温度控制装置和运动控制装置3部分构成的气溶胶喷射打印系统。以纳米银导电油墨为对象，采用单参量对比实验分析法，研究鞘气流量、载气流量、喷嘴与衬底间距、打印速度、打印层数等因素对打印成形宽度的影响。结果表明:随着载气流量增大、层数增加，纳米银导电油墨沉积成形宽度增加；在实验参数范围内，载气流量和打印层数对成形线宽影响明显，且呈正相关；线宽随着鞘气流量的增大先减小后增大；喷嘴与衬底间距在15~45 mm范围内对线宽无明显影响；在喷嘴直径为200 μm，鞘气流量为50 mL·min-1，载气流量为3 mL·min-1，喷嘴与衬底间距为3 mm，衬底移动速度为3 mm·s-1，打印层数为6～8层，加热板温度为80 ℃时，可获得最小宽度为26 μm，高度为7 μm的均匀线条，这也是纳米银导电油墨喷射打印的最优工艺参数。

Influence Factors of Line Width by Aerosol Jet Printing System

In this paper,a home made aerosol jet printing system consisting of an aerosol jet printing device,temperature control and motion control was constructed using a commercial piezoelectric ceramic and a self made ink jet head,and influence factors of width printed was studied applying nano silver conductive ink printing system and parameters of sheath gas flow,carrier gas flow,nozzle substrate distance,printing speed and printing layers.Results show that the deposited line width of nano silver conductive ink increases with the increase of carrier gas flow and layers and,within the range of the parameters involved,carrier gas flow and number of layers have a positive and positive correlation with the line width formed,the line width decreases and then increases with the increase of the sheath gas flow,and the nozzle substrate distance at 1.5~4.5 mm shows no significant influence on the line width formed.Results also show that uniform line at width of 26 micrometers and height of 7 micrometers was printed with optimized parameters of 200 micrometers in nozzle diameter,50 milliliter per minute in sheath gas flow rate,3 milliliter per minute in carrier gas flow rate,3 mm in nozzle to substrate distance,3 millimeters per second in substrate moving speed,6 8 printing layers,and 80 ℃ substrate temperature,which proves the optimal parameters of nano silver conductive ink jet printing.