Abstract
Porous material was processed by the mixing, molding and pressing the ceramic material, afterward burnout and sintering; through the forming porous, using corn flour at different concentration (10, 15 and 20 wt.%) as a pore forming agent; in order to determinate the influence of porous on the mechanical, morphological and structural properties. The effect of the volume fraction of corn flour in the mullite matrix, at various sintering temperature from 1100, 1200, 1300 and 1500?C were tested by Diffraction X ray, showing changes in crystalline phases of mullite (3Al2O3-2SiO2), as result of sintered temperatures. Presence of talcum powder in formula, also cause the formation of the cordierite and cristobalite crystalline phases, giving stability and adhesion to the structure of ceramic material. When sintering at temperatures between 1300 to 1500?C, and it was used the concentration of corn flour 15-20 wt.% as forming agent porous, it was found the better mechanical properties. The scanning electron microscopy analysis shows the presence of open porosity and anisotropy.
Highlights
Porous ceramics have a wide range of applications, ranging from filtrations membranes and catalyst supports to biomaterials, thermally or acoustically insulating bulkJ.G
Porous material was processed by the mixing, molding and pressing the ceramic material, afterward burnout and sintering; through the forming porous, using corn flour at different concentration (10, 15 and 20 wt.%) as a pore forming agent; in order to determinate the influence of porous on the mechanical, morphological and structural properties
The effect of the volume fraction of corn flour in the mullite matrix, at various sintering temperature from 1100, 1200, 1300 and 1500 oC were tested by Diffraction X ray, showing changes in crystalline phases of mullite (3Al2O3-2SiO2), as result of sintered temperatures
Summary
Porous ceramics have a wide range of applications, ranging from filtrations membranes and catalyst supports to biomaterials, thermally or acoustically insulating bulkJ.G. Well-controlled microstructures of porous size and pore distribution permit various applications [3]. These porous ceramics can be categorized in terms of their porous microstructures as: 3D-type with three-dimensionally connected and distributed open pores, 2D-type with slit-shaped open pores and 1D-type with unidirectionally oriented pores. Porous ceramics with 3D structures are useful as catalysts, catalysts supports, filters, scaffolds or adsorbents, because of the high accessibility of their pores. In case of 2-D porous ceramic structures, typically are observed in activated carbons and pillared clays, this last ones have the highest specific surface areas of all the porous materials (3000-4000 m2/g). One important application of porous ceramics is as filters and membranes for use in severe environments at high temperatures and in reactive and corrosive solutions. The ideal porous microstructure for high permeability and separation are well-ordered and unidirectionally oriented cylindrical through-holes (1D-structure) [2, 4,5]
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