Preparation of Self-bonded Mullite Porous Ceramics by Foam-gelcasting Method

被引：0
|
作者：
Deng X. [1 ,2 ]
Wei T. [1 ]
Ran S. [3 ]
Han L. [2 ]
Zhang H. [2 ]
Zhang S. [2 ]
机构：
[1] School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan, 243002, Anhui
[2] The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan
[3] Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Anhui University of Technology, Ma'anshan, 243002, Anhui
来源：
Zhang, Haijun (zhanghaijun@wust.edu.cn) | 1803年 / Chinese Ceramic Society卷 / 45期
关键词：
Foam-gelcasting method; Linear shrinkage ratio; Reaction sintering; Self-bonded mullite porous ceramics;
D O I：
10.14062/j.issn.0454-5648.2017.12.12
中图分类号：
学科分类号：
摘要：
Self-bonded mullite porous ceramics were prepared by foam-gelcasting combined reaction sintering method using mullite powders as main raw materials, Al2O3 and SiO2 powders as starting materials of self-bonded mullite, Isobam 104 as a dispersing/gelling agent, triethanolamine lauryl sulfate as a foaming agent, and sodium carboxymethyl cellulose as a foam stabilizing agent. The effect of self-bonded phase content on the rheological properties and gelling behaviors of the slurries was investigated. The phase composition, microstructures, linear shrinkage ratio, porosity and mechanical properties of the resultant porous samples were characterized. The results show that the porosity and the average spherical pore size of as-prepared porous ceramics increase, while their linear shrinkage ratio and mechanical strength decrease with increasing the self-bonded phase content from 0% to 50% (in mass fraction). When the content of self-bonded phase is 40%, the compressive strength and flexural strength of as-prepared porous sample with the porosity of 76.6% (in volume fraction), average spherical pore size of 565 μm and linear shrinkage ratio of 13.8% are 7.9 MPa and 4.0 MPa, respectively. © 2017, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
引用
收藏
页码：1803 / 1809
页数：6
相关论文
共 21 条
  • [1] Schneider H., Schreuer J., Hildmann B., Structure and properties of mullite-a review, J Eur Ceram Soc, 28, 2, pp. 329-344, (2008)
  • [2] Gong L.L., Wang Y.H., Cheng X.D., Et al., Porous mullite ceramics with low thermal conductivity prepared by foaming and starch consolidation, J Porous Mater, 21, 1, pp. 15-21, (2014)
  • [3] Ding S.Q., Zeng Y.P., Jiang D.L., Fabrication of mullite ceramics with ultrahigh porosity by gel freeze drying, J Am Ceram Soc, 90, 7, pp. 2276-2279, (2007)
  • [4] Chen G.L., Qi H., Xing W.H., Et al., Direct preparation of macroporous mullite supports for membranes by in situ reaction sintering, J Membr Sci, 318, 1, pp. 38-44, (2008)
  • [5] Zeng D.J., Zhang Y.M., Yang J.F., Et al., Fabrication and property of mullite whiskers frameworks with an ultrahigh porosity by expandable mesocarbon microbeads, J Am Ceram Soc, 99, 7, (2016)
  • [6] Lee J.H., Choi H.J., Yoon S.Y., Et al., Porous mullite ceramics derived from coal fly ash using a freeze-gel casting/polymer sponge technique, J Porous Mater, 20, 1, pp. 219-226, (2013)
  • [7] Deng X.G., Wang J.K., Liu J.H., Et al., Preparation and characterization of porous mullite ceramics via foam-gelcasting, Ceram Int, 41, 7, pp. 9009-9017, (2015)
  • [8] Deng X.G., Wang J.K., Zhang H.J., Et al., Effects of firing temperature on the microstructures and properties of porous mullite ceramics prepared by foam-gelcasting, Adv Appl Ceram, 115, 4, pp. 204-209, (2016)
  • [9] Garcia E., Osendi M.I., Miranzo P., Porous mullite templated from hard mullite beads, J Eur Ceram Soc, 31, 8, pp. 1397-1403, (2011)
  • [10] Wu Q., Hong X., Huang D., Bull Chin Ceram Soc, 21, 1, pp. 29-33, (2002)
123