Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 24, Pages 34380-34387Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.08.350
Keywords
One step thermoelectric treatment; Li2O-Al2O3-SiO2 glass-ceramics; Nanocrystalline
Categories
Funding
- Natural Science Foundation of Hainan Province [519MS022]
- Key Scientific & Technological Project of Hainan Province [ZDYF2020015]
- Research Lab construction of Hainan University [ZY2019HN09]
- Innovative scientific research projects for graduate students of ordinary high schools of Hainan Province [Hyb2020-39]
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The influence of thermoelectric treatments on LAS glass-ceramics was studied to produce low expansion transparent LAS nanocrystalline glass by altering crystal phase composition and microstructure.
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.
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