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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Transparent phosphosilicate glasses containing crystals formed during cooling of melts
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Transparent phosphosilicate glasses containing crystals formed during cooling of melts

机译：透明的磷硅酸盐玻璃，包含在熔体冷却期间形成的晶体

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摘要

Effect of P_2O_5-SiO_2 substitution on spontaneous crystallization of SiO_2-Al_2O _3-P_2O_5-Na_2O-MgO melts during cooling was studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and rotation viscometry. Results show that addition of P_2O_5 leads to amorphous phase separation (APS), i.e., phosphate- and silicate-rich phases. It is due to the tendency of Mg~(2+) to form [MgO_4] linking with [SiO_4]. Molar substitution of P_2O_5 for SiO_2 enhances the network polymerization of silicate-rich phase in the melts, and thereby the spontaneous crystallization of cubic Na_2MgSiO_4 is also enhanced during cooling of the melts. In addition, the sizes of the local crystalline and separated glassy domains are smaller than the wavelength of the visible light, and this leads to the transparency of the obtained glasses containing crystals.
机译：通过X射线衍射（XRD），差示扫描量热法（DSC），扫描电子显微镜（SEM）和旋转粘度法研究了P_2O_5-SiO_2取代对冷却过程中SiO_2-Al_2O_3-P_2O_5-Na_2O-MgO熔体自发结晶的影响。结果表明，P_2O_5的添加导致非晶相分离（APS），即富含磷酸盐和硅酸盐的相。这是由于Mg〜（2+）倾向于与[SiO_4]形成[MgO_4]的趋势。 SiO_2的P_2O_5摩尔取代增强了熔体中富含硅酸盐的相的网络聚合，因此，在熔体冷却过程中立方Na_2MgSiO_4的自发结晶也得到了增强。另外，局部结晶和分离的玻璃态畴的尺寸小于可见光的波长，这导致获得的含有晶体的玻璃的透明性。

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