High-performance macro-porous alumina-mullite ceramic membrane supports fabricated by employing coarse alumina and colloidal silica
Source abstract
Abstract
Abstract Cost-effective porous alumina-mullite ceramic membrane supports were prepared from mixtures of different alumina/silica (Al2O3/SiO2) ratios of coarse α-alumina micro-powder and colloidal silica (CS). The effects of sintering temperature, Al2O3/SiO2 ratio and cornstarch content on the crystalline phase evolution, microstructures, porosity, bending strength, pore size distribution and permeance of the ceramic membrane supports were systematically investigated. The results showed that the increase in sintering temperature was beneficial to the mullite formation and the bending strength. However, it was adverse to the improvement of porosity and the pore size distribution which have positive correlation with the permeance of the supports. The increases in Al2O3/SiO2 ratio and cornstarch were favourable to the mullite formation, improvement of porosity, pore size distribution and morphology of the supports, but were unfavourable to the bending strength. A high-performance porous alumina-mullite ceramic support with suitable porosity (50.5%) and pore size (3.1 μm), sufficient mechanical strength (49.7 MPa) and high permeances was successfully synthesized by optimizing the sintering temperature, Al2O3/SiO2 ratio and cornstarch content. Moreover, the proposed simple method shows much potential for the preparation of high-performance porous alumina-mullite ceramic membrane supports.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Recycling and utilization of industrial and municipal waste in materials production · Concrete and Cement Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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