【摘 要】
：
The Sm3+-doped SrO-Al2O3-SiO2 (SAS) glass-ceramics with excellent luminescence properties were prepared by batch melting and heat treatment. The crystallization behavior and luminescent properties of the glass-ceramics were investigated by DTA, XRD, SEM a
【机 构】
：
State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology), Wuhan
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
The Sm3+-doped SrO-Al2O3-SiO2 (SAS) glass-ceramics with excellent luminescence properties were prepared by batch melting and heat treatment. The crystallization behavior and luminescent properties of the glass-ceramics were investigated by DTA, XRD, SEM and luminescence spectroscopy. The results indicate that the crystal phase precipitated in this system is monocelsian (SrAl2Si2O8) and with the increase of nucleation/crystallization temperature, the crystallite increases from 66 % to 79 %. The Sm3+-doped SAS glass-ceramics emit green, orange and red lights centered at 565, 605, 650 and 715 nm under the excitation of 475 nm blue light which can be assigned to the 4G5/2→6Hj/2 (j=5, 7, 9, 11) transitions of Sm3+, respectively. Besides, by increasing the crystallization temperature or the concentration of Sm3+, the emission lights of the samples located at 565, 605 and 650 nm are intensified significantly. The present results demonstrate that the Sm3+-doped SAS glass-ceramics are promising luminescence materials for white LED devices by fine controlling and combining of these three green, orange and red lights in appropriate proportion.
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