Transparent crystallized glass with a surface crystallization layer of sub-millimeter thickness was found in the glass compositions of 35BaO–15TiO2–50GeO2 (BTG50), 28BaO–18TiO2–54SiO2 (BTS54), and 35SrO–20TiO2–45SiO2 (STS45), and the precipitated fresnoite-type crystalline phase showed nonlinear optical properties. XRD measurements confirmed that BTS54 and STS45 crystallized glasses precipitate as a single phase of the fresnoite-type crystallites Ba2TiSi2O8 and Sr2TiSi2O8, respectively. On the other hand, BTG50 crystallized glass precipitated two phases with mainly fresnoite-type BTG, Ba2TiGe2O8 and BaGe4O9. The results of the XRD analysis of STS45 crystallized glass demonstrated high crystal orientation in the (002) direction from the glass surface.
展开▼
机译：在35BaO–15TiO 2 –50GeO 2 （BTG50），28BaO–18TiO 的玻璃成分中发现了具有亚毫米厚度的表面结晶层的透明微晶玻璃> 2 –54SiO 2 （BTS54）和35SrO–20TiO 2 –45SiO 2 （STS45），以及沉淀的方铁矿型结晶相显示非线性光学性质。 X射线衍射（XRD）测量证实BTS54和STS45结晶玻璃以单相形式析出的贝氏体型晶体Ba 2 TiSi 2 O 8 和Sr < sub> 2 TiSi 2 O 8 。另一方面，BTG50结晶玻璃析出了两相，主要是贝氏体型BTG，Ba 2 TiGe 2 O 8 和BaGe 4 O 9 。 STS45结晶玻璃的XRD分析结果表明，从玻璃表面开始（002）方向的晶体取向较高。
展开▼
