Assessment of the Crystallization Process of CaO–Al ₂O ₃–SiO ₂ Glass Probed with Tb ³⁺ Luminescence

Abstract

The ratio of the intensity of Tb ³⁺ fluorescence at 543 nm because of an electric dipole transition ( ⁵D ₄– ⁷F ₅) relative to that at 437 nm due to a magnetic dipole transition ( ⁵D ₃– ⁷F ₄) was determined to be proportional to the amount of metastable CaAl ₂Si ₂O ₈ crystals precipitated in CaO–Al ₂O ₃–SiO ₂ glass. The present results indicate that Tb ³⁺ luminescence can be used as a probe to evaluate the crystallization of glass.

Abstract

The ratio of the intensity of Tb ³⁺ fluorescence at 543 nm due to an electric dipole transition ( ⁵D ₄− ⁷F ₅) to that at 437 nm because of magnetic dipole transition ( ⁵D ₃− ⁷F ₄) was used to probe the precipitation of metastable CaAl ₂Si ₂O ₈ crystals in CaO−Al ₂O ₃−SiO ₂ glass.