Samarium Ions Doped Yttrium Aluminium Garnet Glass Ceramics
Sm3+ doped YAG glass ceramics containing single phase of YAG micro-crystals have been obtained by heat-treating the aluminosilicate precursor glasses. The YAG crystals grow with several preferred orientations and a dominant one (444) in the matrix, and present microcrystal sizes in the range of 3~15µm. The pilotaxitic texture existed in internal network of the YAG glass ceramics can increase yield strength and tensile strength of the sample effectively. Typical visible transition emissions of Sm3+ have been observed in the YAG glass ceramics under the excitation of short-wavelength visible light, and the spectral intensity ratio between the electric dipole 4G5/2→6H9/2 and the magnetic dipole 4G5/2→6H5/2 transitions is lower than the values reported in the optical glasses specifying the enhanced symmetric nature in the Sm3+ doped YAG glass ceramics. The obvious Stark splitting exhibited in emission spectrum manifests that rare-earth ions have been incorporated into YAG lattices.
Chunliang Zhang and Liangchi Zhang
J. Yang et al., "Samarium Ions Doped Yttrium Aluminium Garnet Glass Ceramics", Key Engineering Materials, Vols. 531-532, pp. 216-219, 2013