the removal mechanism is mainly the de-bonding
of the weak molecules through the chemical activity of ceria particles.
The surface modification process for CeO2 particles can be
described as follows: the dissolved silicon first releases to the slurry
solution and then is adsorbed onto the abrasive particles. Therefore,
the corrosion product SiO2(OH)2
2− could be complexed by Ce–OH
due to the chemical activity of CeO2, i.e.,
Ce–OH + SiO2(OH)2
2− → [Ce(SiO3)3]2− + H2O
This leads to the accelerated removal of SiO2(OH)2
2− from silicon
surface and promotes the material removal rate.