A novel way to fabricate fibrous mullite ceramic using sol-gel vacuum impregnation

作者：Yang, Mengmeng; Luo, Xudong^*; Yi, Jian; Yu, Min; Zhang, Xiaofang

来源：Ceramics International, 2018, 44(11): 12664-12669.

DOI：10.1016/j.ceramint.2018.04.066

• Fibrous mullite ceramic
• Mullite fibers
• Sol-gel
• Vacuum impregnation

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.

• 出版日期2018-8-1
• 单位辽宁科技大学; 中国科学院