Mechanically robust ZrO2 foams with 3D reticular architecture prepared from chemical-modified ZrO2 powder |
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Authors: | Jingjing Liu Bo Ren Yuju Lu Yedong Rong Chao Wang Lu Wang Jinlong Yang Yong Huang |
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Affiliation: | State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, P.R. China |
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Abstract: | Engineering mechanically robust ZrO2 foams with three-dimensional (3D) reticular architecture and high porosity is extremely challenging. In current work, we presented an approach for constructing such cellular ceramics via a combined polyurethane foaming and chemical grafting method. Ester functional groups were chemically grafted on the ZrO2 powder surface to enhance its dispersibility. This approach caused the micron-sized windows to assemble onto the cell wall of porous framework, contributing to 3D interconnected reticular architecture. The resulting products with such cellular architecture possessed a high porosity level of 89.2% and maintained an ultrahigh compressive strength of 8.5 MPa. Our results open up new opportunities for fabricating high-performance ZrO2 foams toward practical applications. |
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Keywords: | 3D reticular architecture chemical grafting compressive strength ester functional groups ZrO2 foams |
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