Production Process of PTC heater with metal heat sink

- Apr 30, 2020-

1-BaTiO3 and PbTiO3 powder doped with donor impurities (La O., Nb O) are mixed in a certain ratio, and other impurities are added, and the required PTC element is prepared according to the process flow. The electrode material is ordinary silver paste, and the element is applied Two main surfaces.
2-The aluminum heat sink is welded between two upper and lower aluminum plates with a thickness of 0.8 mm, and one of the aluminum plates extends 5.0 mm long for the electrode lead.
3-The bonding between the PTC element and the aluminum metal heat sink adopts a temperature-resistant conductive adhesive behavior adhesive. According to the use requirements of this conductive adhesive, six PTC elements are evenly bonded between the upper and lower metal heat sinks ( Pay attention to the corresponding position of the electrode lead of each heat sink), pressurize and bake until the conductive adhesive is completely cured, the device is indeed firmly bonded, remove the conductive adhesive oozing around the PTC element, clean the entire device, The exposed surface is coated with insulating heat conductive glue or other materials to prevent creepage. Then, a simple test of the device is conducted to prove that the adhesion is good.