알루미나 세라믹스 표면에 무전해 환원 니켈막의 형성에 관한 연구(I) 무전해 니켈도금의 실험적 석출속도에 관한 연구

Studies on Electroless Nickel Plating on Alumina Ceramics(I) on Empirical Deposition Rate in Electroless Nickel Plating

The electroless nickel plating on high alumina ceramics was performed in the bath containing nickel chloride, sodium hypophosphite and mono- or bi-carboxylic acid as a complexing agent in order to examine the empirical rate law as well as the effects of the complexing agent, plating temperature and pH on the rate of deposition. Adding the carboxylic acid to the plating bath, the rate of deposition was increased considerably, and each of the complexing agents showed a maximum deposition rate plateau around a particular concentration of the complexing agent. The rate of deposition was increased with increasing either temperature or pH, but microstructure of the surface became more rough. Furthermore, empirical rate law of the elecltroless nickel deposition on high alumina ceramics was discussed with the activation energy and other rate parameters calculated.