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A novel method for preparing Si3N4ceramics with unidirectional oriented pores from silicon aqueous slurries
Wan, Tao1,2; Yao, Dongxu1; Yin, Jinwei1; Xia, Yongfeng1; Zuo, Kaihui1; Liang, Hanqin1; Zeng, Yuping1
2017
Source PublicationJournal of the European Ceramic Society
ISSN09552219
Volume37Issue:10Pages:3285-3291
AbstractWe describe a low-cost and simple method to prepare porous silicon nitride (Si3N4) ceramics with unidirectional oriented pores. Using Si powders as raw material, porous ceramics were fabricated via solidification of the aqueous slurries followed by the nitridation and post-sintering. The formation mechanism is similar to the ordered porous metals that are fabricated under high temperature and high pressure. Differently, the green bodies with oriented pores were obtained at room temperature and atmospheric pressure. The nucleation and growth of the H2bubbles generated from hydrolyzed Si powders contributed to the highly oriented pores along the solidification direction of the aqueous slurries. Additionally, the pore microstructure was closely associated with the viscosity of the slurries, which can be well controlled by varying the concentration of organic additive and solid loading. © 2017 Elsevier Ltd
DOI10.1016/j.jeurceramsoc.2017.04.013
EI Accession Number20171603576206
EI KeywordsNitrogen compounds
EI Classification Number443.1 Atmospheric Properties - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 812.1 Ceramics
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25930
Collection中国科学院上海硅酸盐研究所
Affiliation1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.School of Materials Science and Engineering, The University of New South Wales, Sydney; 2052, Australia
Recommended Citation
GB/T 7714
Wan, Tao,Yao, Dongxu,Yin, Jinwei,et al. A novel method for preparing Si3N4ceramics with unidirectional oriented pores from silicon aqueous slurries[J]. Journal of the European Ceramic Society,2017,37(10):3285-3291.
APA Wan, Tao.,Yao, Dongxu.,Yin, Jinwei.,Xia, Yongfeng.,Zuo, Kaihui.,...&Zeng, Yuping.(2017).A novel method for preparing Si3N4ceramics with unidirectional oriented pores from silicon aqueous slurries.Journal of the European Ceramic Society,37(10),3285-3291.
MLA Wan, Tao,et al."A novel method for preparing Si3N4ceramics with unidirectional oriented pores from silicon aqueous slurries".Journal of the European Ceramic Society 37.10(2017):3285-3291.
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