The mixing of impurity particles with deuterium-tritium (DT) fuel affects the energy deposition of α particles in inertial confinement fusion (ICF), which is harmful to the self-sustained burning of plasmas. In our recent studies, we investigated how impurity mixing influences the energy partition and projectile range during α-heating for cases where the ion temperature (T_i) equals or exceeds the electron temperature (T_e). Two kinds of impurity ions, beryllium (Be) and gold (Au), are considered. We conduct calculations at mixture densities of 4.15 and 415.0 g/cm³, with T_e ranging from 0.1 to 100.0 keV. The average ionization degree and partial density of each ion species are determined through the average atom model and the thermodynamic equilibrium condition. Results show that when the number ratio of impurity ions to DT ions (R) reaches 0.05, the mixing of Be reduces the energy partition fraction of DT ions (η_DT) by more than 10%. In the case of Au mixing, it occurs at R = 0.01. At fixed T_e and R, the reduction percentage in η_DT grows slowly with T_i, while the energy partition fraction of electrons (η_e) remains independent of T_i. The gradual increase of η_e with R is observed for Au mixing, and Be mixing leads to a slow decrease of η_e at high temperatures. The energy partition to impurity ions decreases with rising T_i at low T_e. The mixing of Be ions shortens the range of α particles in most cases, while Au mixing lengthens the range and it is more prominent when Au ions are in low charge states. Moreover, the heating of both impurity ions is easier than that of DT ions, with Au ions being heated faster than Be ions. Compared with the mixing of Au ions, Be mixing has a smaller impact on η_DT and the range of α particles. These differences may originate from the distinct charge states, masses, electron screening in the average atom model, and bound-electron effects of the two impurity species. Our findings provide important references for future ICF ignition target design.

α-heating,deuterium-tritium plasma,mixture,beryllium,gold