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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
2017
Source PublicationCeramics International
ISSN02728842
Volume43Issue:7Pages:5517-5523
AbstractThe 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.
DOI10.1016/j.ceramint.2017.01.074
EI Accession Number20170403269473
EI KeywordsNitrogen compounds
EI Classification Number482.2 Minerals - 641.1 Thermodynamics - 802.2 Chemical Reactions - 812.1 Ceramics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25602
Collection中国科学院上海硅酸盐研究所
AffiliationState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China
Recommended Citation
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.
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