Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jeurceramsoc.2012.05.032
Title: Evolution of throttle-channel dual pores in YSZ ceramic monolith through in situ grown nano carbon wedges
Authors: Chen, X.
Hong, L. 
Phua, J.Y.R.
Keywords: Grain growth
Interfaces
Microstructure-final
Porosity
Sintering
Issue Date: Nov-2012
Source: Chen, X., Hong, L., Phua, J.Y.R. (2012-11). Evolution of throttle-channel dual pores in YSZ ceramic monolith through in situ grown nano carbon wedges. Journal of the European Ceramic Society 32 (14) : 3709-3722. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jeurceramsoc.2012.05.032
Abstract: Interconnectivity of the pore channels and their size distribution in a ceramic monolith influence the flow dynamics of permeating fluid. This work proposes an innovative pore-forming mechanism that begins with the growth of poly(p-phenylene terephthamide) (PPTA) in a ceramic green body of yttrium-doped zirconia (YSZ). The spatial confinement drove the formation of PPTA through an extrusion manner, resulting in submicron PPTA rods embedded in the matrix. Theses rods were carbonized under Ar between 800 and 1200 °C for 2. h before oxidizing atmosphere was introduced to facilitate their removal and sintering of YSZ. This dwelling temperature is crucial to the pore size distribution in the sintered ceramic due to the chemical and dimensional changes of the carbon wedges and YSZ grains. The sintered ceramic is characterized by interconnected throttle-to-channel pore structure, which manifested a marked improvement on fluid permeability and a capability of stretching viscous fluids passing through it. © 2012 Elsevier Ltd.
Source Title: Journal of the European Ceramic Society
URI: http://scholarbank.nus.edu.sg/handle/10635/63882
ISSN: 09552219
DOI: 10.1016/j.jeurceramsoc.2012.05.032
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