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Synthesis of Yttrium–Aluminum–Garnet Hollow Microspheres by Reverse-Emulsion Technique

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Yttrium–aluminum–garnet (YAG, Y3Al5O12) hollow microspheres were synthesized by reverse-emulsion (w/o) technique starting with aqua-based precursors of oxides. The non-ionic surfactant was used as the emulsifying agent. The gel powders were calcined at 700°–1200°C. The synthesized powders were characterized by differential thermal analysis (DTA), thermogravimetry, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The appearance of an exothermic peak at 932°C in the DTA curve revealed the crystallization of YAG, which was further confirmed by XRD and FTIR studies. SEM confirmed the formation of hollow microspheres.

Document Type: Research Article


Affiliations: Sol–Gel Division, Central Glass and Ceramic Research Institute, Kolkata 700 032, India

Publication date: 2006-04-01

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