Sintering of porous alumina obtained by biotemplate fibers for low thermal conductivity applications
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In this research report, a sintering process of porous ceramic materials based on Al2O3 was employed using a method where a cation precursor solution is embedded in an organic fibrous cotton matrix. For porous green bodies, the precursor solution and cotton were annealed at temperatures in the range of 100-1600°C using scanning electron microscopy (SEM) and thermogravimetric (TG) analysis to obtain a porous body formation and disposal process containing organic fibers and precursor solution. In a structure consisting of open pores and interconnected nanometric grains, despite the low porosity of around 40% (calculated geometrically), nitrogen physisorption determined a specific surface area of 14m2/g, which shows much sintering of porous bodies. Energy dispersive X-ray (EDX) and X-ray diffraction (XRD) analytical methods revealed a predominant amount of α-Al2O3 in the sintered samples. Thermal properties of the sintered Al2O3 fibers were obtained by using the Laser Flash which resulted in the lower thermal conductivity obtained by α-Al2O3 and therefore improved its potential use as an insulating material. © 2012 Elsevier Ltd.
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Al2O3, Chemically synthesized, Replica method in organic matrix, Sintered porous body, Thermal properties, Analytical method, Disposal process, Energy dispersive x-ray, Green body, Laser flash, Low porosity, Low thermal conductivity, Nanometrics, Organic fibers, Organic matrix, Porous alumina, Porous bodies, Porous ceramic materials, Precursor solutions, Research reports, Sintered samples, Sintering process, Thermogravimetric, Aluminum, Cotton, Physisorption, Scanning electron microscopy, Thermal conductivity, Thermodynamic properties, Thermogravimetric analysis, X ray diffraction, Sintering, Gravimetry, Scanning Electron Microscopy, Thermal Analysis, Thermal Conductivity, Thermal Properties, X Ray Diffraction
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Journal of the European Ceramic Society, v. 33, n. 6, p. 1087-1092, 2013.
