Rapid preparation of low thermal expansion transparent LAS nanocrystalline glass by one-step thermoelectric treatment
| Autor: | Ruixiang Zhang, Xue Liang, Dan Wang, Changjiu Li, Yinzhao Rao, Xiaolong Yu, Lanlin Yi, Zeling Chen, Zhongbin Yin, Hong Jiang, Fanhou Kong |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Process Chemistry and Technology Nucleation Microstructure Nanocrystalline material Thermal expansion Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Crystal Chemical engineering law visual_art Thermoelectric effect Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Crystallization |
| Zdroj: | Ceramics International. 47:34380-34387 |
| ISSN: | 0272-8842 |
| Popis: | The Li2O–Al2O3–SiO2 (LAS) glass ceramics are prepared by one-step thermoelectric treatment. The influence of thermoelectric treatments on LAS glass-ceramics were studied. The crystal phase composition and microstructure of the LAS glass-ceramics were investigated by DSC, SEM, XRD and FTIR. Moreover, the thermal expansion performance and light transmittance of LAS nanocrystalline glass were characterized. The results show that low-expansion transparent LAS nanocrystalline glass can be produced in a short time by thermoelectric treatment. The free energy of nucleation and the degree of polymerization of the glass network are reduced by the electric field. The key is that the electric field polarizes Ti and Zr ions at the crystallization temperature, so that the crystal nuclei repel the same poles. This allows uniform crystal distribution, promotes crystallization and reduces one-step crystallization of crystal agglomeration. This proves that the rapid preparation of nanocrystalline glass by the one-step method is feasible, and provides a reference for the future one-step processing of glass-ceramics. |
| Databáze: | OpenAIRE |
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