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

被引：10
作者：
Li, Minghan [1 ,2 ]
Xiong, Chunrong [1 ,2 ]
Ma, Yanping [1 ,2 ]
Jiang, Hong [1 ,2 ]
机构：
[1] Hainan Univ, State Key Lab Marine Resource Utilizat South Chin, Special Glass Key Lab Hainan Prov, Haikou 570228, Hainan, Peoples R China
[2] Minist Educ, Key Lab Adv Mat Trop Isl Resources, Haikou 570228, Hainan, Peoples R China
来源：
MATERIALS | 2022年 / 15卷 / 22期
关键词：
crystallization study; in situ analysis; crystal growth; Li2O-Al2O3-SiO2; glass-ceramics; LITHIUM ALUMINOSILICATE GLASS; KINETIC-ANALYSIS; BETA-QUARTZ; CRYSTALLINITY; TEMPERATURE; PARAMETERS; MODELS;
D O I：
10.3390/ma15228006
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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-Al2O3-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.
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页数：11
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