著者

高島 教一郎 中島 篤之助 河口 広司 大内 義彦

出版者

社団法人 日本分光学会

雑誌

分光研究 (ISSN:00387002)

巻号頁・発行日

vol.18, no.5, pp.262-267, 1969

被引用文献数

5

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A direct, quantitative analytical technique for the analysis of gadolinium, dysprosium, europium and samarium in aluminum oxide using the X-ray-excited optical fluorescence spectra is described.<BR>Rare earth elements were coprecipitated with host aluminum from acid solution as aluminum hydroxide. Precipitated hydroxide was dried after centrifugal separation and then heated in a muffle furnace at 1000&deg;C for 2 hours. These oxides were then heated at 1450&deg;C in an electric resistance furnace for 60 seconds.<BR>Such an impulsive heating followed by quenching, described above, prominently enhances the luminescent intensities of rare earth elements. It was shown by the X-ray diffraction method that the crystal of Al<SUB>2</SUB>O<SUB>3</SUB> were transformed from &gamma;r-type oxide to the stable &alpha;-type oxide during the above heat treatment.<BR>Concentrations of gadolinium, dysprosium, samarium, europium have been determined by this method with detection limits ranging from 0.05 to 1.0ppm. Reproducibility was found to be 5-10%.The enhancement and suppression effect due to iron, silicon and copper were investigated and discussed.