Study of Li2O addition on crystallization behavior and thermal expansion properties of CaO-Al2O3-SiO2 (CAS) glass-ceramic and its application for joining SiC ceramic

被引：38

作者：

Fang, Jian ^{[1
]}

Sun, Liangbo ^{[1
]}

Guo, Songsong ^{[1
]}

Liu, Chunfeng ^{[1
,2
]}

Zhang, Jie ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Harbin Inst Technol, Ctr Anal & Measurement, Harbin 150001, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2021年 / 41卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Glass-ceramics; Crystallization behavior; Thermal expansion properties; Microstructure; Joining;

D O I：

10.1016/j.jeurceramsoc.2020.10.061

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Various glass-ceramics were prepared based on the CaO-Al2O3-SiO2 system with the addition of Li2O in an attempt to develop a suitable sealant for SiC ceramic. The effects of Li2O content on crystallization behavior and thermal expansion properties were systematically investigated. The results revealed that the addition of Li2O significantly reduced the crystallization activation energy of glass. Besides, as the Li2O content increased, the precipitation of spodumene and wollastonite was promoted while the precipitation of anorthite was suppressed. By controlling the Li2O content and crystallization treatment, the coefficient of thermal expansion (CTE) of glass-ceramic could be adjusted in a certain range, from 8.5 x 10(-6)/degrees C to 2.8 x 10(-6)/degrees C. When the content of Li2O was 3 wt.%, the CTE of the formed glass-ceramic was well-matched with that of SiC ceramic. Furthermore, it was confirmed that this glass-ceramic possessed an excellent wettability and weldability to SiC ceramic.

引用

页码：1817 / 1827

页数：11

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