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Effect of albumin content on the rheological properties and wet foam stability of porous ceramics

Journal of Ceramic Processing Research
약어 : J. Ceram. Process. Res.
2018 vol.19, no.4, pp.296 - 301
DOI : 10.36410/jcpr.2018.19.4.296
발행기관 : 한양대학교 청정에너지연구소
연구분야 : 재료공학
Copyright © 한양대학교 청정에너지연구소
장우영 1 ,  Bijay Basnet 2 ,  박정규 3 ,  임형미 4 ,  임태영 5 ,  김익진 6

1한서대학교

2한서대학교

3한서대학교 무기재료 공정 및 응용연구소

4한국세라믹기술원

5한국세라믹기술원

6한서대학교

3 회 열람

The stabilization of wet foam was an important parameter for obtaining a large volume of dried foam in SiC porous ceramics. Octylamine was used as a foam stabilizer, which modifies the particle surface. Albumin was added as a foaming agent toachieve a higher volume of wet foam with higher stability. Viscosity of the colloidal suspension varying with albumin contentwas found to be typical, as on increasing albumin content, the slurry showed shear thickening behavior. The viscosity of theslurry was found to be increased, hindering thick strutting. This gave more stability to the wet foam on mechanical frothing,to produce porous ceramics on sintering. In terms of the rheological properties, wet foams were characterized as a functionof air content, wet foam stability, bubble size, and relative bubble size. Controlling the air content inside the foam, the wet foamstability of the wet foams was improved from 20 to 90% with the increment of albumin content. Proof of the stability is shownby the controlled increment of the relative bubble size to less than 2.5 times. With all these improved parameters uponsintering, highly interconnected pore structure was achieved for various applications.

SiC, Rheological properties, Foaming agent, Wet foam, Porous ceramics

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