Abstract
The ratio of the intensity of Tb3+ fluorescence at 543 nm because of an electric dipole transition (5D4–7F5) relative to that at 437 nm due to a magnetic dipole transition (5D3–7F4) was determined to be proportional to the amount of metastable CaAl2Si2O8 crystals precipitated in CaO–Al2O3–SiO2 glass. The present results indicate that Tb3+ luminescence can be used as a probe to evaluate the crystallization of glass.
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