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In-situ reaction bonding to obtain porous SiC membrane supports with excellent mechanical and permeable performance
Luo, Zhi-Yong1; Han, Wei1; Yu, Xiao-Jie1; Ao, Wen-Qing1; Liu, Kai-Qi2
2019-05-01
Source PublicationCERAMICS INTERNATIONAL
ISSN0272-8842
Volume45Issue:7Pages:9007-9016
AbstractIn order to develop filter material that can be used for high-temperature gas cleaning, porous SiC ceramic membrane support was fabricated by in situ reaction bonding. Pressureless sintering was carried out in the temperature range of 1280-1480 degrees C in air. Green bodies were formed by uniaxially pressing coarse SiC particles (150-180 mu m) as a skeleton, fine SiC particles and rho-Al2O3 powder as bonding additives, basic magnesium carbonate as sintering aid and polyvinyl alcohol (PVA) as binder. Effects of sintering temperature and rho-Al2O3 content on mechanical performance and physical properties of porous SiC ceramics were systematically investigated. Results revealed that interconnected pores of support were mainly formed due to the packing of SiC coarse particles. Mullite (3Al(2)O(3).2SiO(2)) was formed due to in-situ reaction between cristobalite obtained by SiC surface oxidation and alpha-Al2O3 converted from rho-Al2O3 at higher temperatures. SiC particles were strongly bonded by mullite and oxidation-derived SiO2, which resulted in highly porous SiC membrane support with excellent mechanical properties. Open porosity of samples decreased with an increase in sintering temperature and rho-Al2O3 content. In addition, flexural strength initially increased up to threshold limit, followed by gradual decrease. The sample with 9 wt. % rho-Al2O3 exhibited the highest flexural strength after sintering at 1430 degrees C for 3 h. As-prepared SiC support with 9 wt. % rho-Al2O3 demonstrated flexural strength of 25.1 MPa and air permeability of 4.8 x 10(-12) m(2). Moreover, as-prepared support exhibited excellent resistance to cyclic thermal shock, which indicates that these supports can be used for high-temperature flue gas cleaning under normal pressure.
KeywordPorous SiC ceramic Membrane support In situ reaction Mullite Air permeability
DOI10.1016/j.ceramint.2019.01.234
Language英语
WOS KeywordLOW-TEMPERATURE FABRICATION ; FLEXURAL STRENGTH ; CERAMICS ; OXIDATION
Funding ProjectNational Key R&D Program of China[2016YFB0601100]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
Funding OrganizationNational Key R&D Program of China
WOS IDWOS:000463688500116
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28219
Collection中国科学院过程工程研究所
Corresponding AuthorHan, Wei; Liu, Kai-Qi
Affiliation1.Cent Iron & Steel Res Inst, Beijing Key Lab Adv Ceram & Refractories, Beijing 100081, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Luo, Zhi-Yong,Han, Wei,Yu, Xiao-Jie,et al. In-situ reaction bonding to obtain porous SiC membrane supports with excellent mechanical and permeable performance[J]. CERAMICS INTERNATIONAL,2019,45(7):9007-9016.
APA Luo, Zhi-Yong,Han, Wei,Yu, Xiao-Jie,Ao, Wen-Qing,&Liu, Kai-Qi.(2019).In-situ reaction bonding to obtain porous SiC membrane supports with excellent mechanical and permeable performance.CERAMICS INTERNATIONAL,45(7),9007-9016.
MLA Luo, Zhi-Yong,et al."In-situ reaction bonding to obtain porous SiC membrane supports with excellent mechanical and permeable performance".CERAMICS INTERNATIONAL 45.7(2019):9007-9016.
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