Pressureless Sintering Behavior of Silver Nanoparticles at Low Temperatures

摘要

Sintering and densification of 50 nm silver nanoparticles (NPs) pass through two stages.rnSolid state sintering at 250℃ and below and liquid state sintering at 300℃ and above. Therndependence of neck growth at different temperatures and times during the solid state sintering isrnconfirmed by SEM. The liquid state sintering forms a silver film with no porosity. Nearly 100%rndensification of the silver NPs and nonhomogeneous surface premelting of the silver film duringrnthe liquid phase sintering is confirmed by SEM.