2013
DOI: 10.1590/s1516-14392013005000147
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Structural and fluid dynamic characterization of calcium carbonate-based porous ceramics

Abstract: The aim of this work was to experimentally evaluate the use of calcium carbonate as a poregenerating agent in ceramic compositions. Compositions that contained 50% kaolin, 20% limestone, and different concentrations of quartz and feldspar were prepared by uniaxial pressing. Samples were heat-treated at a heating rate appropriate to induce calcium carbonate degassing, and they were then sintered at 800, 900, and 1050 °C. Tests of X-ray fluorescence, thermogravimetric analysis, porosimetry, and air permeation we… Show more

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Cited by 9 publications
(4 citation statements)
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“…The degradation rate of β-wollastonite was also influenced by the crystallinity, sintering period, microstructure, and porosity [ 39 , 40 ]. In this study, the main factor for the increasing degradation rate is the porosity of the material itself.…”
Section: Resultsmentioning
confidence: 99%
“…The degradation rate of β-wollastonite was also influenced by the crystallinity, sintering period, microstructure, and porosity [ 39 , 40 ]. In this study, the main factor for the increasing degradation rate is the porosity of the material itself.…”
Section: Resultsmentioning
confidence: 99%
“…The Darcy permeability k 1 and inertial permeability k 2 in this work and those obtained from recent literature on porous ceramics, such as porous SiC ceramics, 41,42 porous Si 3 N 4 ceramics, 11,43,44 porous SiC–Si 3 N 4 ceramics 45 and other porous ceramics, 46–48 are shown in Figure 13. It is worth mentioning that the porous Si 3 N 4 prepared this work has a k 1 ranging from 1.59 × 10 −15 to 1.91 × 10 −14 m 2 , falling in the microfiltration zone of the k 1 range of 1 × 10 −17 to 1 × 10 −13 m 2 , which indicates that the samples prepared in this work are suitable for microfiltration applications.…”
Section: Resultsmentioning
confidence: 59%
“…For the theoretical high surface area, excellent permeability, good chemical and thermal stability, low electrical and thermal conductivity 1–5 , porous ceramics are widely used in chemical, energy, metallurgy, bio-medicine, environmental protection, aerospace and other fields 610 , as filter materials, catalyst supports, insulation materials, bio-functional materials and so on. Generally a porous material is needed.…”
Section: Introductionmentioning
confidence: 99%