Low temperature synthesis of YAG:Ce phosphors by LiF assisted sol–gel combustion method

• Published in: Powder technology Vol. 198; no. 2; pp. 229 - 232
• Main Authors: Jiao, Huan, Ma, Qiang, He, Lilong, Liu, Zhen, Wu, Qiaoli
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 10.03.2010; Elsevier
• Subjects: Applied sciences; Chemical engineering; Exact sciences and technology; Miscellaneous; Nano-powders; Optical properties; Sintering, pelletization, granulation; Solid-solid systems; Sol–gel processes; X-ray methods; YAG:Ce; YAG:Ce; Sol–gel processes; X-ray methods; Optical properties; Nano-powders; Scanning electron microscopy; Phase composition; Differential thermal analysis; Combustion; X ray diffraction; Precursor; Powder; Sol gel process; Sintering; Sol-gel processes; Microstructure; Low temperature
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2009.11.011

Ce doped yttrium aluminium garnet (YAG:Ce) was synthesized by LiF assisted sol–gel combustion method. The thermal behavior, composition, and microstructure feature of the precursor were studied by TG/DTA, XRD, PL, and SEM. The using of LiF in the sol–gel combustion process was helpful to decrease the sintering temperature about 200 °C. The X-ray diffraction patterns of the powder sintered at 540 °C were identical with the stoichiometric YAG composition, which was the lowest temperature reported for the synthesis of crystalline and single phase YAG. The PL intensity of the particles was found to be affected by the content of LiF and this phenomenon was thought to be related to the change of phase composition with the increase of flux. Ce doped yttrium aluminium garnet (YAG:Ce) was synthesized by LiF assisted sol–gel combustion method. The using of LiF in the sol–gel combustion process was equitant to decrease sintering temperature about 200 °C. YAG:Ce powders can be obtained at 540 °C, which was the lowest temperature reported for the synthesis of crystalline and single phase YAG:Ce. The PL intensity of particles was found to be affected by the content of LiF. [Display omitted] Morphology of YAG:Ce powder synthesized at 540 °C.