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Porous Si3N4ceramics fabricated through a modified incomplete gelcasting and freeze-drying method
Wang, Feng1; Gu, Hao2; Yin, Jinwei1; Yao, Dongxu1; Xia, Yongfeng1; Zuo, Kaihui1; Liang, Hanqin1; Ning, Congqin1; Zeng, YuPing1
2017
Source PublicationCeramics International
ISSN02728842
Volume43Issue:17Pages:14678-14682
AbstractPorous Si3N4ceramics were fabricated via incomplete gelcasting and freeze-drying method followed by pressureless sintering at 1690 . The specific way used in this work was to slow down the gelling process of ceramic suspensions by stopping water evaporation. Since water was retained and further frozen before the suspensions were totally gelled in normal way, pore structure was modified. Compared to direct freeze-casting, the polymer framework generated by polymerization of organic components prevented ice crystals from growing to large sizes. Performance of porous ceramics can also be controlled by the gelling time. Further on, porous Si3N4ceramics with controlled pore structures can be obtained without using other organic additives. The gelling agent used in this study is a copolymer of isobutylene and maleic anhydride (IBMA). The small addition amount was only 0.2 wt%, but could greatly change the microstructure as well as mechanical performance of porous ceramics. © 2017 Elsevier Ltd and Techna Group S.r.l.
DOI10.1016/j.ceramint.2017.07.194
EI Accession Number20173504095798
EI KeywordsNitrogen compounds
EI Classification Number802.3 Chemical Operations - 812.1 Ceramics - 931.2 Physical Properties of Gases, Liquids and Solids
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25445
Collection中国科学院上海硅酸盐研究所
Affiliation1.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.Shanghai Radio Equipment Research Institute, Shanghai; 200090, China
Recommended Citation
GB/T 7714
Wang, Feng,Gu, Hao,Yin, Jinwei,et al. Porous Si3N4ceramics fabricated through a modified incomplete gelcasting and freeze-drying method[J]. Ceramics International,2017,43(17):14678-14682.
APA Wang, Feng.,Gu, Hao.,Yin, Jinwei.,Yao, Dongxu.,Xia, Yongfeng.,...&Zeng, YuPing.(2017).Porous Si3N4ceramics fabricated through a modified incomplete gelcasting and freeze-drying method.Ceramics International,43(17),14678-14682.
MLA Wang, Feng,et al."Porous Si3N4ceramics fabricated through a modified incomplete gelcasting and freeze-drying method".Ceramics International 43.17(2017):14678-14682.
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