Co-precipitation synthesis and sintering of yttrium aluminum garnet (YAG) powders: the effect of precipitant

Solvothermal nanoYAG synthesis: Mechanism and particle growth kinetics

“…The degree of crystallinity and phase(s) present were determined using an X-ray diffractometer (Bruker D8, Bruker AXS GmbH, Karlsruhe, Germany) at a step size of 0.02° from 20° to 90° 2θ. The average crystallite size was calculated from the line broadening of (321), (400), (420), (422), (431) and (521) reflections using the Scherrer formula reported elsewhere [8,10].…”

“…Routes such as sol-gel [6,7], co-precipitation [6,8], and combustion synthesis [9,10], often produce single phase YAG powders, but with a high degree of agglomeration.…”

Dynamic study of ammonium dawsonite doped with yttrium transformation at elevated temperatures

“…This study was devoted to the magnesium/aluminum spinel powder synthesis; Mg/Al ratio corresponded to this one compound. After aging dawsonite of such a composition decomposed to ammonium dawsonite and also hydrotalkite (Mg 6 Al 2 (CO 3 )(OH) 16 Á4H 2 O). X-ray amorphous ammonia version of dawsonite appeared in some studies on YAG synthesis [4][5][6].…”

Sol-gel Synthesis of Macroporous YAG from Ionic Precursors via Phase Separation Route

“…18 ,21 -23 For example, Wang et al 18 prepared Y-Al-O nanoparticulate gels from nitrate salts and ammonia solution, and observed the precipitation of YAG after subsequent heat treatment at 800c C. Li et al 22 reported that YAG nanoparticles can be obtained for the specimens prepared by using nitrate salts and ammonium hydrogen carbonate as starting materials, followed by heat treatment at 900c C. Obviously, the onset temperature of crystallization for the specimens derived from the present method is comparable to or lower than that for the specimens prepared via the co-precipitation method, which is again indicative of the uniform distribution of Y …”