Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5460537 | Journal of Alloys and Compounds | 2017 | 6 Pages |
Abstract
Porous Si3N4 ceramics were fabricated through gelcasting followed by pressureless sinter at 1690 °C. Oil-in-water (O/W) Si3N4 suspensions were prepared by mixing paraffin O/W emulsion and Si3N4 suspensions, sodium alginate was used as gelling agent. The casted suspensions were quickly gelled by spraying calcium chloride aqueous solution onto the surface, thus oil was enwrapped into the green bodies. The porous Si3N4 ceramics had spherical-shaped pores both with and without adding O/W emulsion. As changing the O/W emulsion content in the suspension, porous Si3N4 ceramics with high open porosity of 60.1-63.9% and flexural strength of 44.5-34.6 MPa were obtained.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Feng Wang, Jinwei Yin, Dongxu Yao, Yongfeng Xia, Kaihui Zuo, Hanqin Liang, YuPing Zeng,