With increasing of ion exchange time and concentration of NaF, the content of HA in the coating decreases while F-rich apatite (FHA) increases, and the size of the crystals changes.

• 随着离子交换时间的延长或氟化钠浓度的增加，HA含量降低，FHA含量升高，涂层的晶粒尺寸和致密性均发生变化。