Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Feature: Preparation of Ceramic and Related Materials via Novel Chemical Processing: Papers
Synthesis of Y2O3:Eu phosphor with various particles morphologies by solvothermal reaction in methanol–water system
Kouichi NAKASHIMAMidori SAITOValery PETRYKINShu YINTsugio SATOMasato KAKIHANA
Author information
JOURNALS FREE ACCESS

2011 Volume 119 Issue 1390 Pages 445-450

Details
Abstract

A methanol–water mixed solvent was used as a reaction medium for the synthesis of Eu3+-doped Y2O3 (Y2O3:Eu) phosphor. Y2O3:Eu was prepared under solvothermal conditions at 150–300°C for 3–24 h using a solution of water and methanol as the reaction medium followed by heat treatment at 1000°C for 2 h. The phase composition and optical properties of the products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence spectroscopy. The powders obtained were composed of plate-like particles, spindle-like particles, and whisker particles and were different for samples prepared under supercritical, subcritical, and normal conditions of methanol. With the reaction temperature increasing, the particle size became smaller, in particular, the particles were ∼500 nm in size at 300°C under supercritical condition of methanol. After calcination at 1000°C for 2 h, the obtained powders retained the initial shape. The emission peaks of the fluorescence were assigned to the f–f transitions of the Eu3+ and exhibited red emission. The fluorescence intensities and internal quantum efficiency exhibited various values dependence on the morphology of the obtained particles.

Information related to the author
© 2011 The Ceramic Society of Japan
Previous article Next article
feedback
Top