- 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
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°C for 2 hours. These oxides were then heated at 1450°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 γr-type oxide to the stable α-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.