Effect of the addition of polyvinylpyrrolidone as a pore-former on microstructure and mechanical strength of porous alumina ceramics

Feng, Yi, Wang, Kun, Yao, Jianfeng, Webley, Paul A., Smart, Simon and Wang, Huanting (2013) Effect of the addition of polyvinylpyrrolidone as a pore-former on microstructure and mechanical strength of porous alumina ceramics. Ceramics International, 39 7: 7551-7556. doi:10.1016/j.ceramint.2013.03.007


Author Feng, Yi
Wang, Kun
Yao, Jianfeng
Webley, Paul A.
Smart, Simon
Wang, Huanting
Title Effect of the addition of polyvinylpyrrolidone as a pore-former on microstructure and mechanical strength of porous alumina ceramics
Journal name Ceramics International   Check publisher's open access policy
ISSN 0272-8842
1873-3956
Publication date 2013-09
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.ceramint.2013.03.007
Open Access Status
Volume 39
Issue 7
Start page 7551
End page 7556
Total pages 6
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2014
Language eng
Formatted abstract
The effect of the solvent on the properties of porous alumina ceramics was studied when polyvinylpyrrolidone (PVP) was used as an organic pore-former. In particular, porous alumina ceramics were produced by dry-pressing of mixed PVP–alumina powder; the mixing of PVP and alumina powder was achieved via ball milling using water or acetone as solvent, or dry ball milling. Due to the different solubility of PVP in water and acetone, porous alumina ceramics with different pore structures and mechanical properties were obtained. Because of its cylindrical pores being aligned to some extent, the sample prepared using acetone as solvent exhibited the highest bending strength (140.2 MPa) and Young's modulus (57.4 GPa), which were 1.6 times and 3.4 times higher compared to that prepared without PVP. Moreover, the addition of PVP via wet ball milling led to more uniform dispersion of PVP in alumina, hence limiting the grain growth during sintering process and increasing the grain bonding.
Keyword Mechanical properties
Porous ceramics
Microstructure
Minimum Solid Area
Porosity Relations
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
 
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