Here, R1 describes the decompositio

Here, R1 describes the decomposition of zinc acetate into ZnO and acetic anhydride, which further reacts with oxygen to produce CO2 and H2O as shown on R2. R3 is reported for a case of high humid atmosphere where zinc acetate can react with water to form ZnO and acetic acid. Both reactions hold reasonable for given the cold sintering, as its open system characteristic makes accessible to oxygen and water. Considering pressure solution creep mechanism as a governing mechanochemical process for the cold sintering,37 the dissolution of ZnO by acetic acid solution may produce zinc acetate complexes at the compressional grain boundaries,38 which is consistent with XRD analysis. Once those complexes precipitate at tensional sides, then they undergo decomposition and produce ZnO, which mainly contributes ZnO cold sintering to be phase pure.