Abstract The effect of Y2O3 on the glass transition kinetics, crystallization kinetics, phase separation and crystallization behavior of 60ZnO–30B2O3–10SiO2 glass has been investigated by non-isothermal differential thermal analysis, scanning electron microscopy (SEM) and X-ray powder diffraction (XRD). The glass transition activation energies Eg calculated by using both Kissinger and Moynihan model decrease from 668 kJ/mol to 573 kJ/mol for Kissinger model, and 682 kJ/mol to 587 kJ/mol for Moynihan model with the increase of yttrium oxide doping content from 0 to 6 mol%. And the glass crystallization kinetics parameters, crystallization activation energy Ec and Avrami exponent n stands for crystal growth, are also obtained on the basis of several well developed equations. Increase of about 58 kJ/mol in Ec values obtained by different theoretical equations is caused by addition of 6 mol% yttrium oxide into 60ZnO–30B2O3–10SiO2 glass, and the Avrami exponent (n close to 2) suggests that crystal growth in 60ZnO–30B2O3–10SiO2 glass doped with or without yttrium is mainly one-dimensional growth of crystals. The results on the phase separation and crystallization behavior occurred at 893 K and 993 K respectively for base and doped glass, are well consistent with the glass transition and crystallization kinetics results. Hence, addition of yttrium oxide into 60ZnO–30B2O3–10SiO2 glass decrease the glass transition activation energy while increase the crystallization activation energy of glass, thereby the stability of glass structure is improved. Phase separation phenomenon and crystallization behavior occurred at glass surface provide some useful information for preparing glass ceramics with micro- or nano-crystals in surface.

中文翻译：

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掺杂 Y2O3 的 ZnO-B2O3-SiO2 玻璃的玻璃化转变和结晶

摘要 通过非等温差热分析、扫描电子显微镜 (SEM) 和 X 射线粉末衍射研究了 Y2O3 对 60ZnO–30B2O3–10SiO2 玻璃的玻璃化转变动力学、结晶动力学、相分离和结晶行为的影响。 XRD）。使用 Kissinger 和 Moynihan 模型计算的玻璃化转变活化能 Eg 从 668 kJ/mol Kissinger 模型降低到 573 kJ/mol，Moynihan 模型从 682 kJ/mol 降低到 587 kJ/mol 随着氧化钇掺杂量的增加从 0 到 6 mol%。并且玻璃结晶动力学参数、结晶活化能 Ec 和代表晶体生长的 Avrami 指数 n 也是基于几个完善的方程获得的。通过不同的理论方程获得的 Ec 值增加约 58 kJ/mol 是由于在 60ZnO–30B2O3–10SiO2 玻璃中加入了 6 mol% 的氧化钇，Avrami 指数（n 接近 2）表明晶体在 60ZnO–掺杂或不掺杂钇的 30B2O3-10SiO2 玻璃主要是晶体的一维生长。基础玻璃和掺杂玻璃的相分离和结晶行为的结果分别发生在 893 K 和 993 K，与玻璃化转变和结晶动力学结果非常一致。因此，在 60ZnO-30B2O3-10SiO2 玻璃中加入氧化钇降低了玻璃化转变活化能，同时提高了玻璃的结晶活化能，从而提高了玻璃结构的稳定性。