SnO_2:Eu粉末蛍光体の合成と物理化学的および発光特性(<小特集>セラミック材料小特集)

概要

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SnO_2 : Eu powder phosphor was examined concerning to its synthesis, physcochemical properties and luminescent characteristics for the purpose of practical use in low-energy-election excitation. The oxalate coprecipitate of Sn and Eu composed of large particles with clear crystal facets was found to give bright SnO_2 : Eu powder phosphor. The solubility limit of Eu into SnO_2 was 0.05〜0.06 at.%, and smaller mean diameter, higher resistivity (order of 10^6Ω・cm) and more intensive diffused reflectance were observed with increasing Eu addition. Although the same emission spectra by f-f transition (^5D_0-^7F_1 main emission) were observed in UV, high and low-energy-electron excitation, the intrinsic emission from SnO_2 matrix was different in each excitation method. The Optimum addition of O. I at. % Eu, 5.9 msec decay (1/10), and the efficiency of 2 lm/W at 9~10 V were obtained at low-energy-electron excitation. Efficiency increased at lower voltage and current excitation due to sublinearities of brightness-voltage and current dependences.
社団法人日本材料学会の論文
1982-10-15