Sintering aids, their role and behaviour in the production of transparent ceramics

Silver nanoparticles as a new sintering additive for the fabrication of YAG:Ce optical luminescent ceramics

“…The formation of a more fusible phase of aluminum–magnesium spinel of various compositions is also possible 38 . When using TEOS as a sintering additive, $${\mathrm{Si}}_{{\mathrm{Al}}}^ \bullet \ $$defects are formed, as well as low‐melting SiO 2 –Al 2 O 3 eutectic solid solutions 3 . Additionally, oxygen vacancies $$V_O^{ \bullet \bullet }$$ are inevitably formed under vacuum sintering conditions.…”

“…The mode of operation of diverse sintering additives differs; nevertheless, generally, the inclusion of sintering aids results in the creation of substitutional solid solutions, an augmentation in the diffusion coefficient, and a reduction in the surface energy at the grain interface in the presence of impurity phases 5 . In addition, the segregation of sintering additives such as MgO at the grain boundaries is possible, which can result in a deceleration of grain growth during the final stage of vacuum sintering 3,6 . Sintering additives like SiO 2 , MgO, and CaO are commonly utilized for the manufacturing of YAG‐based optical ceramics 7 .…”

“…Sintering additives are utilized to attain the necessary optical characteristics of YAG-based functional ceramics, notably YAG:Ce. 3,4 The mode of operation of diverse sintering additives differs; nevertheless, generally, the inclusion of sintering aids results in the creation of substitutional solid solutions, an augmentation in the diffusion coefficient, and a reduction in the surface energy at the grain interface in the presence of impurity phases. 5 In addition, the segregation of sintering additives such as MgO at the grain boundaries is possible, which can result in a deceleration of grain growth during the final stage of vacuum sintering.…”

“…5 In addition, the segregation of sintering additives such as MgO at the grain boundaries is possible, which can result in a deceleration of grain growth during the final stage of vacuum sintering. 3,6 Sintering additives like SiO 2 , MgO, and CaO are commonly utilized for the manufacturing of YAG-based optical ceramics. 7 Selecting optimal concentrations of these sintering additives enables the attainment of desired characteristics for the optical ceramics.…”

Energetics of point defects in yttrium aluminum garnet doped with Mg and Si

“…An overview of different sintering aids and of the variety of transparent ceramics prepared with their addition was given in [23].…”