Nanostructure and Transparency of KTiOPO4@SiO2 Nanocrystalline Glass-Ceramics by Wet-Chemical Route

作者：Li Dong-Lin^*; Tian Miao; Li Qian; Ma Shou-Long; Xie Rong; Gou Lei; Fan Xiao-Yong; Zhao Peng

来源：Chinese Journal of Inorganic Chemistry, 2013, 29(9): 1903-1908.

DOI：10.3969/j.issn.1001-4861.2013.00.246

• KTiOPO4
• SiO2
• sol-gel
• nano-glass-ceramics
• transparency
• second harmonic generation (SHG)

Transparent 25KTiOPO(4)-75SiO(2) (KTP@SiO2) nanocrystalline glass-ceramics were synthesized by the wet-chemical method. Morphology and nanostructure of the KTP nanocrystals embedded in the silicate glass were characterized by means of X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). The results show that, KTP nanocrystals with the size of similar to 30 nm are precipitated from SiO2-based glass in the heat-treated transparent gels, forming KTiOPO4@SiO2 nanophase glass-ceramics. At the same time, a large amount of irregular mesopores were eliminated, but small amount of spherical nanopores with 30 nm-diameter form. This type of relatively dense glass-ceramic exhibits the optical transmittance of about 64% in the visible region. Based on nanostructure data, the effects of the nanostructure on the transparency of the glass-ceramics were analyzed according to Rayleigh model. It shows that the ratio of the refractive indices decreases the optical transmittance of the KTiOPO4@SiO2 nano-glass-ceramics in the visible region.

• 出版日期2013-9-10
• 单位长安大学