Glass Enamel & Ophtalmic Optics, Volume. 50, Issue 8, 8(2022)
Effect of Zirconia Content on Crystallization and Physicochemical Properties of Li-Al-Si Glass Ceramics
The effects of different zirconia content and heat treatment process on the physical and chemical properties of lithium aluminum silicate glass were studied. Results show that when the value of zirconia (mol%) was increased from 2.0 to 3.5, it is beneficial to grain refinement, and the transmittance of glass ceramics increased from 70% to 85%. It had little effect on Vickers hardness and thermal expansion coefficient of glass, but decreased acid resistance and increased alkali resistance. When the zirconia (mol%) is more than 3.0, the composite crystalline phase of sillilaterite and zirconia nanocrystalline can be precipitated after crystallization, and the Vickers hardness of glass ceramics increased gradually from 6.38 GPa to 7.28 GPa. At the same time, the thermal expansion coefficient increased gradually under the influence of precipitated crystalline phase, but the transmittivity and chemical stability was reduced.
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TIAN Yingliang, LIU Xinhao, ZHAO Zhiyong, HAN Jinlong. Effect of Zirconia Content on Crystallization and Physicochemical Properties of Li-Al-Si Glass Ceramics[J]. Glass Enamel & Ophtalmic Optics, 2022, 50(8): 8
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Received: Apr. 12, 2022
Accepted: --
Published Online: Feb. 17, 2023
The Author Email: TIAN Yingliang (tianyl@bjut.edu.cn)