Luminescent properties and applications of Tb 3+ doped silicate glasses with industrial scales

Abstract

Tb 3+ doped X-ray conversion glassy screen with an industrial scale (50 mm × 50 mm × 12 mm) was successfully fabricated, and its luminescent properties and applications in CCD imaging system were investigated. Results showed that Tb 3+ doped silicate glasses mainly emit weak blue (400–460 nm) and strong green (480–570 nm) fluorescence. With the increase of Tb 3+ ion concentration, the intensity of green emission increases, but that of blue emission decreases. Gd 3+ ions can sensitize the luminescence of Tb 3+ ions among silicate glasses. With the increase of CeO 2 concentration, the luminescent intensity of Tb 3+ doped silicate glasses at 550 nm quickly decreases. However, the irradiation resistance of Tb 3+ doped silicate glasses can be effectively improved by CeO 2 addition. The imaging quality of the luminescent glass screen is more excellent than that of Gd 2O 2S polycrystalline screens.