Eu^<2+>付活ストロンチウム酸窒化アルミナケイ酸塩(サイアロン)の蛍光特性

概要

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The fluorescence of two divalent europium-activated oxonitridoaluminosilicates, namely SrSi_5AlO_2N_7 and SrSiAl_2O_3N_2, is reported in this work. The powder sample was synthesized by sintering at 1800℃ (SrSi_5AlO_2N_7) or 1600℃ (SrSiAl_2O_3N_2) for 2h under 0.5 MPa N_2. A single broadband blue-green emission is observed for both SrSi_5AlO_2N_7: Eu^<2+> and SrSiAl_2O_3N_2: Eu^<2+> at room temperature under ultraviolet excitation. The short-wavelength fluorescence is attributed to the weak crystal-field strength as a result of long distances between the activator ion and ligand anions. The effect of the Eu^<2+> concentration on the emission intensity and CIE chromaticity coordinations of both samples is presented.
社団法人日本セラミックス協会の論文
2005-07-01