Effects of K2CO3 on the preparation and optical properties of ZnO nanocrystals doped zinc-alumino-silicate glasses

In order to investigate the effects of K2CO3 on the preparation and optical properties of ZnO nanocrystals doped zinc-aluminium-silicon (SAZK) glasses, SAZK glasses were prepared by melt-quenching method followed by a heat treatment process. Differential thermal analysis, transmission electronic microscopy, X-ray diffractometer, Fourier transform infrared spectrometer and fluorescence spectrophotometer have been used to investigate the microstructure and optical properties of the samples. The results showed that glass ceramics were obtained after heat treated at 750 for 2 h. The main crystal phase in SAZK glasses transformed from Zn2SiO4 to ZnO nanocrystals with increasing K2CO3 content. SAZK glass ceramics showed a wide emission band from 450 to 700 nm with a maximum at 580 nm. The photoluminescence intensity of glass containing 8 mol% K2CO3 in the raw material was strongest. ©, 2015, Journal of Functional Materials. All right reserved.