The effect of oxidation on the mechanical properties and dielectric properties of porous Si3N4ceramics

doi:10.1016/j.ceramint.2017.01.074

	The effect of oxidation on the mechanical properties and dielectric properties of porous Si3N4ceramics
	Liang, Hanqin; Zeng, Yuping; Zuo, Kaihui; Xia, Xiongfeng; Yao, Dongxu; Yin, Jinwei
刊名	Ceramics International
	2017
卷号	43 期号:7 页码:5517-5523
ISSN号	02728842
DOI	10.1016/j.ceramint.2017.01.074
英文摘要	The effect of oxidation temperature and time on the microstructures, phase compositions, mechanical properties, and dielectric properties of porous Si3N4ceramics was investigated in the temperature range from 900 °C to 1300 °C for 1 h, 5 h, and 24 h. The weight gain measured either at lower temperature (900 °C) for long time (24 h) or at higher temperature (1300 °C) for 1 h demonstrated that the porous Si3N4ceramics were easily oxidized under the current test conditions. Results showed that the amount of open pores, flexural strength, compressive strength, and dielectric constant all decreased with the increase of oxidation temperature independent upon the oxidation time. The oxidation product SiO2was low-temperature quartz in mild condition (low temperature, short time) and cristobalite in severe condition (high temperature, long time). The existence of cracks on the oxide scale was due to the phase transformation of SiO2and thermal expansion coefficient mismatch between SiO2and Si3N4. © 2017 Elsevier Ltd and Techna Group S.r.l.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25602]
专题	中国科学院上海硅酸盐研究所
作者单位	State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China
推荐引用方式 GB/T 7714	Liang, Hanqin,Zeng, Yuping,Zuo, Kaihui,et al. The effect of oxidation on the mechanical properties and dielectric properties of porous Si3N4ceramics[J]. Ceramics International,2017,43(7):5517-5523.
APA	Liang, Hanqin,Zeng, Yuping,Zuo, Kaihui,Xia, Xiongfeng,Yao, Dongxu,&Yin, Jinwei.(2017).The effect of oxidation on the mechanical properties and dielectric properties of porous Si3N4ceramics.Ceramics International,43(7),5517-5523.
MLA	Liang, Hanqin,et al."The effect of oxidation on the mechanical properties and dielectric properties of porous Si3N4ceramics".Ceramics International 43.7(2017):5517-5523.