首先配制Ni-Co合金镀液，然后将称好的纳米Al2O3颗粒缓缓加入到配制好的镀液中，用玻璃棒简单搅拌，这时团聚的纳米颗粒并不能分解团聚，纳米颗粒还是相互吸附在一起，为了把团聚的纳米颗粒分散开，把加入纳米颗粒的镀液倒入高能球磨机中，进行充分的球磨分散（24h），球磨机中的硬质玛瑙球会把团聚的纳米颗粒研磨开，大大降低纳米颗粒的晶粒尺寸，纳米颗粒会吸附镀液中金属离子和官能团，相互之间产生静电力阻效应，使纳米颗粒之间不能相互接近，即可得到n-Al2O3/Ni-Co复合镀液，如图所示。

Firstly, prepare the Ni-Co alloy plating solution, then slowly add the weighed nano-Al2O3 particles into the prepared plating solution and stir briefly with a glass rod, at this time the agglomerated nano-particles do not decompose and agglomerate, the nano-particles are still adsorbed together, in order to disperse the agglomerated nano-particles, pour the plating solution with the nano-particles into a high energy ball mill for full ball milling and dispersion (24h). The hard agate balls in the ball mill will grind away the agglomerated nanoparticles and greatly reduce the grain size of the nanoparticles. The nanoparticles will adsorb the metal ions and functional groups in the plating solution and produce electrostatic force resistance effect between them, so that the nanoparticles cannot approach each other, and the n-Al2O3/Ni-Co composite plating solution can be obtained, as shown in the figure.