Fabrication of surface crystallized glasses with α-Zn3B2O6 and their optical property
Fabrication of surface crystallized glasses with α-Zn3B2O6 and their optical property
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DOI：
10.1016/j.jnoncrysol.2010.04.046
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发表时间：
2010-10
影响因子：
3.5
通讯作者：
H. Masai;T. Ueno;Y. Takahashi;T. Fujiwara
中科院分区：
文献类型：
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作者：
H. Masai;T. Ueno;Y. Takahashi;T. Fujiwara
在α-B_2O_3-CaO-K_2O-Al_2O_3系统玻璃中，观察到了常规热处理后亚稳态的表面晶化现象。X-射线衍射仪证实了透明微晶玻璃中有高取向度的α-ZN_3B_2O_6析出。透射电子显微镜图像显示，α-ZN_3B_2O_6晶棒从微晶玻璃表面析出，晶向为(1-−-21)方向。虽然在微晶玻璃中观察到了强烈的取向相，但晶体的偏振方向并不强，从而产生了较强的二次谐波。粉末样品倍频测试表明，α-α-B2O6微晶玻璃的二阶光学非线性与SiO_2微晶玻璃相当。
Surface crystallization of metastable α-Zn3B2O6was observed in ZnO-B2O3-CaO-K2O-Al2O3glass after conventional heat treatment. Precipitation of α-Zn3B2O6with high orientation degree in the transparent glass–ceramics was confirmed by XRD measurement. Transmission electron microscope image showed that crystalline rods of α-Zn3B2O6were precipitated from the surface of the glass–ceramics with the crystalline orientation of (1 −2 1) direction. Although the strongly oriented phase was observed in the glass–ceramics, the polarization direction was not strong from the crystal that can bring strong second harmonic generation (SHG). SHG measurement using a powder sample showed that the 2nd optical nonlinearity of α-Zn3B2O6glass–ceramics was comparable to that of α-SiO2.