摘要 : Glasses based on the system of Sm2O3-Bi2O3-GeO2 were prepared, and their electronic polarizabilities and formation behavior of Bi2GeO5 (monoclinic) and Bi4Ge3O12 (cubic) crystals were clarified. The glasses showed large electronic... 展开 Glasses based on the system of Sm2O3-Bi2O3-GeO2 were prepared, and their electronic polarizabilities and formation behavior of Bi2GeO5 (monoclinic) and Bi4Ge3O12 (cubic) crystals were clarified. The glasses showed large electronic polarizabilities (alpha(o2-)(n)) and optical basicities (Lambda(n)), e.g., alpha(o2-)(n) = 2.783 angstrom(3) and Lambda(n) = 1.070 for 50Bi(2)O(3)-50GeO(2) glass, indicating a basic nature in the glasses. The small addition of Sm203 was found to be effective for the control of the crystallization of Bi2O3-GeO2 glasses. Sm3+-doped Bi2GeO5 nanocrystals with an ellipsoidal shape (a(long)- 32 nm b(short)-20 nm) and Sm3+-doped Bi4Ge3O12 nanocrystals with a spherical shape (-7 nm) were formed in the glass-ceramics of 5Sm(2)O(3)-45Bi(2)O(3)-50GeO(2) and 5Sm(2)O(3)-31Bi(2)O(3)-54GeO(2)-10B(2)O(3), respectively. Highly oriented crystal lines consisting of Bi2Ge05 or Bi4Ge3O12 were patterned at the glass surface by continuous wave Yb:YV04 fiber laser (wavelength: 1080 nm) irradiations, suggesting the possibility of the design and control of spatially selected crystallization in Bi2O3-GeO2 based glasses. (C) 2017 Elsevier B.V. All rights reserved. 收起