Study on Crystallization Process of Li2O-Al2O3-SiO2 Glass-Ceramics Based on In Situ Analysis

Minghan Li; Chunrong Xiong; Yanping Ma; Hong Jiang

doi:10.3390/ma15228006

Study on Crystallization Process of Li₂O-Al₂O₃-SiO₂ Glass-Ceramics Based on In Situ Analysis

Materials (Basel). 2022 Nov 12;15(22):8006. doi: 10.3390/ma15228006.

Authors

Minghan Li^{1

2}, Chunrong Xiong^{1

2}, Yanping Ma^{1

2}, Hong Jiang^{1

2}

Affiliations

¹ State Key Laboratory of Marine Resource Utilization in South China Sea, Special Glass Key Laboratory of Hainan Province, Hainan University, Haikou 570228, China.
² Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education, Haikou 570228, China.

Abstract

In this paper, we used differential scanning calorimetry (DSC), high-temperature X-ray diffraction (HT-XRD), and confocal scanning laser microscopy (CSLM) to investigate the Li₂O-Al₂O_3-SiO₂ glass crystallization process. At 943 K, lithium disilicate (Li₂Si₂O₅) phase crystals began to precipitate in the Li₂O-Al₂O₃-SiO₂ glass with a crystal size of 50-70 nm. At the temperature of 1009 K, petalite (LiAlSi₄O₁₀) crystals began to precipitate in the vitreous phase, forming composite spherical crystals of LiAlSi₄O₁₀ and Li₂Si₂O₅ with size in the range of 90-130 nm. Furthermore, the Kissinger method and KAS method of the JMAK model were used to calculate the crystallization activation energy and the Avrami index "n". It was found that the precipitation mechanism of the two kinds of crystals is whole crystallization; accordingly, the selection of crystallization heat treatment system was guided to determine the nucleation and crystallization temperature.

Keywords: Li2O–Al2O3–SiO2 glass-ceramics; crystal growth; crystallization study; in situ analysis.

Abstract

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