Aluminium paste is formed by ball milling of aluminium powder to form very fine flake aluminium powder, then add additives and solvents, so as to form aluminium paste, according to the arrangement of aluminium powder in the aluminium paste, it can be divided into floating aluminium paste and non-floating aluminium paste, the former has strong sense of metal but low adhesion, the latter has poorer sense of metal, but better adhesion.    Previously, the aluminium paste are oil-based, with the development of society, people pay more and more attention to environmental protection, so in recent years the water-based aluminium silver paste industry has developed rapidly. The production of water-based aluminium paste one is through the second generation of the cladding process, the aluminium powder cladding up, such a treatment process weak sense of metal, but this is also the main domestic production process of water-based aluminium silver paste; the other is a layer of nano-silicon dioxide on the surface of the aluminium sheet of such products, and then clad a layer of polymer protection layer