The size and size distribution will be affected by many factors in the process of synthesize Mg-Al-HTlc nanoparticles using mixed co-precipitation method. Orthogonal design was used in this paper to synthesis Mg-Al-HTlc nanoparticles and to estimate the factors (such as peptizing time, peptizing temperature, aging time and alkali dosage) effect on the unit cell parameters, size and size distribution in the preparing monodispersed Mg-Al-HTlc nanopartical process. The result showed that the influence order of...