Abstract
A sol–gel method based on in situ generation of mixed-metal chelates by complexing metal ions with 1,2-ethanediol in aqueous media has been developed to prepare pure and substituted yttrium aluminium garnets: Y3Al5O12 (YAG), Y3Sc2Al1Ga2O12 (YSAGG-3212), Y3Sc1Al3Ga1O12 (YSAGG-3131), Y3Sc2Al3O12 (YSAG), Y3Al3Ga2O12 (YAGG), Y3Sc2.5Ga2.5O12 (YSGG). The XRD patterns of the powders sintered at 1000 °C showed the formation of monophasic garnet material except in the case of YSGG sample. The thermal behaviour, phase transformations, composition and micro-structural features in the gels and polycrystalline samples were studied by TG/DTA, XRD, FT-IR, SEM and EDX analysis. These new materials doped with different active elements could be potential candidates as laser materials for solid-state lasers.
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