@article{HUANG2024, 
author = {Ze HUANG and Chengji DENG and Bo DONG and Chao YU and Jun DING and Qingyou ZHU and Hongxi ZHU and Yibo WANG},
title = {Preparation and Properties of Mullite Fiber Reinforced Oxide Porous Ceramics},
year = {2024},
journal = {Journal of Ceramics},
volume = {45},
number = {3},
pages = {508-514},
keywords = {fly ash cenosphere, mullite fiber, porous ceramic materials, liquid-phase sintering, high temperature thermal conductivity, mechanical properties},
url = {https://www.sciopen.com/article/10.13957/j.cnki.tcxb.2024.03.009},
doi = {10.13957/j.cnki.tcxb.2024.03.009},
abstract = {Fly ash cenospheres, feldspar powder and alumina powder with various specifications were utilized as the raw materials and mullite fibers were introduced as a reinforcing phase to fabricate porous ceramics. The effect of mullite fiber on properties of the porous ceramics and the mechanism were studied. It is indicated that the incorporation of low-melting phases from feldspar powder at high temperatures was employed to reduce the eutectic point of materials, transforming the physical interface between the matrix phases into a chemical bond. An increase in mullite fiber content led to rise in closed porosity of the porous ceramics after sintering at 1100 ℃. Simultaneously, room-temperature compressive strength and bulk density initially increased and then decreased with rising content of mullite fiber. Optimal comprehensive performance was achieved when the mullite fiber content was 10 wt.%, resulting in a volume density of (0.74±0.01) g·cm-3, a true porosity of (72.70±0.58)%, and a room-temperature compressive strength of (7.30±0.64) MPa. In addition, average thermal conductivities of the specimens at 300 ℃, 600 ℃ and 900 ℃ were 0.202 W·m-1·K-1, 0.214 W·m-1·K-1 and 0.244 W·m-1·K-1, respectively.}
}