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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 >The effect of complex nucleating agent on the crystallization, phase formation and performances in lithium aluminum silicate (LAS) glasses
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The effect of complex nucleating agent on the crystallization, phase formation and performances in lithium aluminum silicate (LAS) glasses

机译：复合成核试剂对铝硅酸锂（LAS）玻璃结晶，相形成和性能的影响

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摘要

The glasses and glass-ceramics in Li2O-Al2O3-SiO2 system containing three complex nucleating agents (TiO2 + ZrO2 + P2O5) were prepared respectively. The effects of P2O5 content on crystallization mechanism and microstructure were researched by means of Differential Scanning Calorimetry, X-Ray Diffraction, Raman Spectra, Fourier Transform Infrared and Scanning Election Microscopy. Simultaneously, the effects of structure and composition on thermal expansion coefficient, transmittance, Vickers hardness, density, bending strength, and chemical stability were also discussed. The results indicated that P2O5 can promote the nucleation and crystallization process by forming AlPO4 and accelerating the precipitation of ZrTiO4. With the increase of P2O5 content (less 5 wt%), the promoting effect of elevated crystallization temperature on the process of grain grown enhanced gradually. Especially when P2O5 content is 5 wt%, the sample have the smallest crystals and the best performance, and there is a relatively low temperature and wide temperature range where could keep the grain size of P5 samples almost unchanged.
机译：分别制备含有三种复合成核试剂（TiO 2 + ZrO2 + P2O5）的Li2O-Al2O3-SiO2系统中的眼镜和玻璃陶瓷。通过差示扫描量热法，X射线衍射，拉曼光谱，傅里叶变换红外和扫描选举显微镜研究了P2O5含量对结晶机理和微观结构的影响。同时，还讨论了结构和组合物对热膨胀系数，透射率，维氏硬度，密度，弯曲强度和化学稳定性的影响。结果表明，通过形成ALPO 4并加速ZRTIO4的沉淀，P2O5可以通过形成ALPO 4来促进成核和结晶过程。随着P2O5含量的增加（较少5重量％），升高的结晶温度对晶粒生长过程的促进效果逐渐增强。特别是当P2O5含量为5wt％时，样品具有最小的晶体和最佳性能，并且存在相对较低的温度和宽温度范围，可以保持P5样品的晶粒尺寸。

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