“…An understanding of the underlying mechanisms of metal NP sintering is necessary in the fields of electric packaging and manufacturing [ 8 , 22 , 53 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 ]. The sintering process of Ag NPs has been discussed using the classical sphere-sphere model [ 71 ], and the relationship between the mechanical properties and microstructures was investigated.…”