期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 102, 期 9, 页码 5503-5513出版社
WILEY
DOI: 10.1111/jace.16378
关键词
alumina ceramic foams; compressive strength; gelation; hierarchical pore structure; porosity
资金
- China Postdoctoral Science Foundation [2017M610085, 2018M630149, 2018M630154, 2018M631492]
- National Natural Science Foundation of China [51572140, 51702184]
Ceramic foams with significant porosity and robust mechanical properties have received extensive attentions. However, it is still difficult to achieve excellent compressive strength at high porosity levels. In this work, a gelation of foamed boehmite sol method is proposed to settle this issue. The technological parameters during preparation process are systematically investigated. As-prepared alumina ceramic foams possess unprecedentedly high compressive strength of 34.1-89.1MPa at high porosity levels of 66.0%-87.2%, which is attributed to the present of hierarchical pore structure, small grain size and pore size. This work demonstrates a facile and novel method for the fabrication of high-performance alumina ceramic foams toward practical applications.
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