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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.122  No.1428 (August) (2014)  >  pp.630-633

Journal of the Ceramic Society of Japan
<<Previous article Vol.122  No.1428 (August) (2014)   pp.630 - 633 Next article>>

Synthesis of (Ca1−xSrx)4Si2O7F2 oxyfluoride solid solutions and their photoluminescence properties activated by Eu2+ ions

Jihong MIN1), Hideki KATO1), Makoto KOBAYASHI1), Yasushi SATO1), Masato KAKIHANA1)
1) Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

The synthesis of oxyfluoride solid solutions with the composition (Ca1−xSrx)4Si2O7F2 is reported in this study. (Ca1−xSrx)4Si2O7F2 is found to form a solid solution within the entire composition range. Synthesis of Sr4Si2O7F2, which is the first compound in the Sr–Si–O–F system, can be regarded as one of the interesting results of this study. The Eu2+-activated (Ca1−xSrx)4Si2O7F2 solid solutions, except for Sr4Si2O7F2 exhibited photoluminescence under excitation at 300–450 nm at room temperature. The samples with x = 0.25–0.75 showed a broad red emission band with a peak around 630 nm, whereas the Ca4Si2O7F2:Eu2+ (x = 0) showed blue emission with a peak at 470 nm. Thus, the substitution of Sr for Ca in Ca4SiO7F2:Eu2+ changed the photoluminescence properties remarkably.


Keyword:
Oxyfluoride, Phosphor, Sr4Si2O7F2, Solid solution, Red emission

Received: February 15, 2014
Accepted: June 11, 2014 , Published online: August 01, 2014

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