2008

YttriumI 2600 Controlling the Morphology of Yttrium Oxide Through Different Precursors

Synthesized by Hydrothermal Method. — Y2O3 sheets, rods, and needles and tubes are hydrothermally synthesized using the precursors Y2(OH)5.14(NO3)0.86·H2O, Y4O(OH)9(NO3), and hexagonal Y(OH)3, respectively (autoclave, 80—220 °C, 24 h) followed by calcination at 600 °C for 4 h in air. Reaction temperature and initial pH value during the hydrothermal reaction determine the formation of the precursor. Dur-ing calcination the original morphology of the precursors is retained. The samples are characterized by powder XRD, SEM, and TEM. — (LI, N.; YANAGISAWA*, K.; J. Solid State Chem. 181 (2008) 8, 1738-1743; Res. Lab. Hydrotherm. Chem., Fac. Sci., Kochi Univ., Akebono, Kochi 780, Japan; Eng.) — W. Pewestorf

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ChemInform 2008, 39, issue 46 ©WlLEY-VCH Verlag GmbH & Co. KGaA, Weinheim