Nanostructured yttrium aluminum garnet powders synthesized by co-precipitation method using tetraethylenepentamine
来源期刊：JOURNAL OF RARE EARTHS2009年第6期
论文作者：WANG Wenju LI Xianxue
Key words：yttrium aluminum garnet; powder technology; co-precipitation; ceramics; rare earths;
Abstract: Tetraethylenepentamine (C_8H_(23)N_5, TEPA) has been used as a novel precipitant to synthesize yttrium aluminum garnet (Y_3Al_5O_(12),YAG) precursor from a mixed solution of aluminum and yttrium nitrates via a normal-strike co-precipitation method without controlling the pH value during precipitation process. The original precursor was analyzed by thermogravimetry/differential scanning calorimetry (TG/DSC).The evolution of phase composition and micro-structure of the as-synthesized YAG powders were characterized by X-ray diffraction (XRD),Fourier transform infrared (FT-IR) spectroscopy and transmission electron microscopy (TEM). Compositionally pure YAG nanostructured powders were directly obtained by calcination of the precursor at 900 ℃ without the formation of any intermediate phases. The average par-ticle size determined from TEM micrograph for the powder obtained at 1000 ℃ was approximately 50 nm.
WANG Wenju1，LI Xianxue2
(1.Financial Division,Putian University,Putian 351100,China;
2.Department of Environment & Life Science,Putian University,Putian 351100,China;
3.Beijing Center for Crystal Research and Development,Technical Institute of Physics and Chemistry,Chinese Academy of Scien)
Abstract:Tetraethylenepentamine (C_8H_(23)N_5, TEPA) has been used as a novel precipitant to synthesize yttrium aluminum garnet (Y_3Al_5O_(12),YAG) precursor from a mixed solution of aluminum and yttrium nitrates via a normal-strike co-precipitation method without controlling the pH value during precipitation process. The original precursor was analyzed by thermogravimetry/differential scanning calorimetry (TG/DSC).The evolution of phase composition and micro-structure of the as-synthesized YAG powders were characterized by X-ray diffraction (XRD),Fourier transform infrared (FT-IR) spectroscopy and transmission electron microscopy (TEM). Compositionally pure YAG nanostructured powders were directly obtained by calcination of the precursor at 900 ℃ without the formation of any intermediate phases. The average par-ticle size determined from TEM micrograph for the powder obtained at 1000 ℃ was approximately 50 nm.
Key words:yttrium aluminum garnet; powder technology; co-precipitation; ceramics; rare earths;
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