Influence of solution composition on weight increasing when electroless plating nickel onto diamond powder
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摘要: 通过正交试验探究络合剂、分散剂、稳定剂的浓度对金刚石微粉镀镍增重率的影响。结果表明:影响镀镍增重率因素的主次排序为:氨水> 柠檬酸> 柠檬酸钠> 硫脲> 十二烷基苯磺酸钠。综合考虑增重率、漏镀、连晶等情况,金刚石微粉表面化学镀镍的最优配方为:硫酸镍25 g/L,次亚磷酸钠33 g/L,氨水10~15 mL/L,柠檬酸15~20 g/L,柠檬酸钠10~15 g/L,硫脲1.3~2.1 mg/L,十二烷基苯磺酸钠1.6~2.4 g/L。Abstract: The influence of concentration of complexant, dispersing agent and stable agent on the weight rate of electroless nickel plating on diamond powder was investigated by means of orthogonal experiment method. The results show that the influence order of factors on weight is as follows: ammonia> citric acid> sodium citrate> thiourea> dodecyl benzene sulfonate. Considering the weight gain rate, electroless plating leakage and crystals stock, the optimal recipe of electroless nickel plating on diamond powder is nickel sulfate 25 g/L, sodium hypophosphite 33 g/L, ammonia 10-15 mL/L, citric acid 15-20 g/L, sodium citrate 10-15 g/L, thiourea 1.3-2.1 mg/L, dodecyl benzene sulfonate 1.6-2.4 g/L。
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Key words:
- diamond powder /
- electroless plating nickel /
- weight gain /
- bath proportioning
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