期刊
CERAMICS INTERNATIONAL
卷 44, 期 11, 页码 12664-12669出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.04.066
关键词
Fibrous mullite ceramic; Mullite fibers; Sol-gel; Vacuum impregnation
资金
- National Natural Science Fund of China [51772139]
Inspired by bird's nest structure, fibrous mullite ceramic was fabricated by vacuum impregnation with mullite fibers as raw material and zirconia sol-gel as inorganic binder. The effect of impregnation times on the properties of the fibrous mullite ceramic, such as porosity, microstructure, compressive strength and room-temperature thermal conductivity were investigated. The results showed that low density (0.45-0.66 g/cm(3)), relative high compressive strength (0.62-3.34 MPa) and low thermal conductivity (0.037-0.125 W/mk) were exhibited for the sample. The toughness of fibrous mullite ceramic was enhanced due to the micro-creaks caused by transformation of zirconia. From the experimental results, it is suggested that it was an optimal method which have the potential use in high-temperature thermal insulation materials to produce fibrous mullite ceramics.
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