Ab initio study the effects of Si and Mg dopants on point defects and Y diffusion in YAG

Nd:YAG transparent ceramics fabricated by direct cold isostatic pressing and vacuum sintering

“…4. The formation of YAG phase from Y 2 O 3 and Al 2 O 3 powder mixtures includes three successive transformations, which has already been reported in previous studies [32]. The reaction equations are as follows:…”

“…The choice and treatment of starting powders [27][28][29][30], the category and the amount of sintering aids [26,31,32], the ball milling process [33], the forming method [34][35][36][37][38][39][40][41][42][43][44], the sintering trajectory [45,46], the post-treatment process [47,48], and characterizations of laser ceramics [49][50][51] have been widely studied. In terms of the forming technologies, uniaxial dry-pressing, uniaxial dry-pressing followed by cold isostatic pressing (CIP) [34][35][36][37][38], tape casting [39][40][41][42], gel casting [43], and slip casting [44] are widely used for green body preparation.…”

Effect of air annealing on the color center in Yb:Y3Al5O12 transparent ceramics with MgO as sintering additive

“…The formation energy of oxygen vacancies with MgO dopants in YAG ceramics is 3.74 eV according to the calculation [21]. So, a lot of oxygen vacancies appear in the lattice instead of cation vacancies or interstitial atom (O i ) even after air annealing.…”

Microstructure evolution of SiO2, ZrO2-doped Y3Al5O12:Nd3+ ceramics obtained by reactive sintering

“…It has been determined that doping by SiO 2 would not be an appropriate approach to obtain the extremely low level of residual defects necessary for high-energy lasers [14]. Complex sintering additives such as B 2 O 3 -SiO 2 and MgOSiO 2 [26][27][28][29] were shown to increase the densification rate of yttrium-aluminum garnet and inhibit anomalous grain growth due to formation of transient liquid phase. This work is devoted to studies of evolution of microstructure and sintering trajectory of SiO 2 , ZrO 2 -doped YAG:Nd 3+ laser ceramics.…”