ブラックライト照射により発光するCe^<3+>Mn^<2+>付活炭酸カルシウム蛍光体の合成とその蛍光特性

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This paper reports about synthesis and fluorescence properties of Ce^<3+> and Mn^<2+> codoped calcium carbonate phosphor emitting by black light irradiation. Ce^<3+> and Mn^<2+> codoped vaterite phosphor was synthesized with liquid phase reaction by adding 0.10 mol・dm^<-3>(NH_4)_2CO_3 solution into 0.10 mol・dm^<-3> CaCl_2 solution including Ce(NO_3)_2 and MnCl_2 at 35℃. The optimum excitation wavelength of Ce^<3+> doped vaterite phosphor with Ce/Ca atomic ratio 0.006 was observed at 322 nm. The emission wavelength of the vaterite phosphor excited with 322 nm light was 367 and 385 nm in the near ultraviolet radiation region. The emission of Ce^<3+> and Mn^<2+> codoped vaterite phosphor excited with 322 nm light was observed about 640 nm and the emitted color was red emission. The largest emission was observed to the vaterite phosphor prepared from synthetic conditions of(Ce+Mn)/Ca atomic ratio 0.058 and Mn/(Ce+Mn)atomic ratio 0.67.
社団法人日本セラミックス協会の論文
2000-09-01