基于强脉冲光烧结的纳米颗粒银导线力学和电学性能

Mechanical and Electrical Properties of Nanoparticle Silver Wires Based on IPL Sintering

打印后烧结工艺是影响柔性银导线力学和电学性能的关键因素之一,其中非接触式的强脉冲光(IPL)烧结有着广阔的应用前景。采用多尺度银纳米颗粒导电墨水通过喷墨打印系统制备银导线,并应用强脉冲光烧结系统进行烧结,同时使用热压烧结进行对比研究。结果表明,当脉冲数量为3、总能量密度为5.358 J/cm^(2)时,由于单次脉冲的过量能量导致打印银线出现失效断裂。进一步对烧结参数进行优化,当脉冲数为12、总能量密度为6.173 J/cm^(2)时,打印银线的电阻率为15.228μΩ·cm。与热压烧结相比,强脉冲光烧结后样品的耐弯曲疲劳性能更加稳定,在一些样品不可直接接触的应用场景下有较大的应用潜力。

The post-print sintering process is one of the key factors affecting the mechanical and electrical properties of flexible silver wires,in which a non-contact type of intense pulse light(IPL)sintering has broad application prospects.Silver wires were prepared with the multi-scale silver nanoparticle conductive ink through an ink-jet printing system,and were sintered by using the IPL sintering system.Meanwhile,a comparative study was conducted using hot press sintering.The results show that when the number of pulses is 3 and the total energy density is 5.358 J/cm^(2),the excessive energy of a single pulse causes the printing silver wire to fail and fracture.Further,the sintering parameters were optimized.When the number of pulses is 12 and the total energy density is 6.173 J/cm^(2),the resistivity of the printed silver wire is 15.228μΩ·cm.Compared with hot press sintering,samples sintered by IPL have a more stable performance in bending fatigue resistance,and have a greater application potential in some application scenarios where samples cannot be directly contacted.