Abstract: A new palladium-free activation process for electroless nickel plating on alumina ceramics was studied . Alumina ceramic was modified by alkali treatment , then nickel particles were prepared on the surface of ceramic sub strate by heat treatment , and finally electroless nickel plating was carried out. The influence of activation solution concentration , activation temperature and activation time on the activation effect was studied by single factor analysis . The surface morphology of the sub strate at each stage was ob- served by scanning electron microscope , and the matrix after activation was analyzed by energy spectrum. The adhesion of the coating was evaluated by thermal shock test. The results show that the best activation effect is obtained when the concentration of nickel sulfate and sodium hypophosphite are 20 g/L and 80 g/L , respectively , the activation temperature is 195 ℃ , and the activation time is 8 min . After activa- tion , a large number of active nickel particles are formed on the surface of the sub strate . After plating , the structure of the coating is uniform and compact , with 100% coverage rate and good adhesion and weldability.Palladium-Free_Activation_Electroless_Nickel_Plating_on_Alumina_Ceramic_Substrate
Palladium-Free Activation Electroless Nickel Plating on Alumina Ceramic Substrate
Published Date: 2024-02-21 17:17:37