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Microstructure and Properties of Porous Mullite-based Ceramics Prepared by Particle-Stabilized Foam Method
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Han WANG, Cuiwei LI, Linghao WU, Hao LI
Journal of the Chinese Ceramic Society | 2020, 48(6) : 824 - 832
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Journal of the Chinese Ceramic Society | 2020, 48(6): 824-832
• Special Topic on Engineering Ceramic Materials •
Microstructure and Properties of Porous Mullite-based Ceramics Prepared by Particle-Stabilized Foam Method
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Han WANG, Cuiwei LI, Linghao WU, Hao LI
Affiliations
  • Center of Material Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China

    • WANG Han (1994-), female, Master candidate. E-mail:

About Author:

WANG Han (1994-), female, Master candidate. E-mail:

Published: 2020-06-20 doi: 10.14062/j.issn.0454-5648.20190511
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The porous mullite-based ceramics were prepared by a particle-stabilized foam method and a subsequent freeze-drying process with α-Al2O3 and SiO2 as raw materials, propyl gallate (PG) as a surface modifier and gelatin as a binder. The effect of aluminum to silicon (Al/Si) molar ratio on the composition, microstructure and properties of the prepared materials was investigated. The results show that the foam stability after foaming at different proportions is >95%. The sintered material is composed of mullite as a main phase and corundum as a second phase, and the mullite phase content decreases from 93.11% (in mass fraction) to 85.11% with increasing the Al/Si molar ratio from 2.0∶1.0 to 3.0∶1.0. The total porosity and bulk density are 85.51%-86.51% and 0.44-0.48 g/cm3, respectively. The open porosity is 84.34%-84.82%. The compressive strength firstly increases and then decreases (i.e., 2.25-2.86 MPa). The vacuum thermal conductivity increases from 0.15 W/(m·K) to 0.22 W/(m·K). It is indicated that the method could be promising to prepare porous mullite-based ceramics with a high porosity, a high strength and a low thermal conductivity.

mullite  /  porous ceramics  /  particle-stabilized  /  freeze drying  /  thermal conductivity
王涵, 李翠伟, 武令豪, 李昊. 颗粒稳定泡沫法制备莫来石基多孔陶瓷的结构与性能. 硅酸盐学报, 2020 , 48 (6) : 824 -832 . DOI: 10.14062/j.issn.0454-5648.20190511
Han WANG, Cuiwei LI, Linghao WU, Hao LI. Microstructure and Properties of Porous Mullite-based Ceramics Prepared by Particle-Stabilized Foam Method[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (6) : 824 -832 . DOI: 10.14062/j.issn.0454-5648.20190511
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Year 2020 volume 48 Issue 6
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Article Info
doi: 10.14062/j.issn.0454-5648.20190511
  • Receive Date：2019-07-17
  • Online Date：2026-10-29
  • Published：2020-06-20
Article Data
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History
  • Received：2019-07-17
  • Revised：2019-08-18
Funding
Affiliations
    Center of Material Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China

Corresponding:

LI Cuiwei (1973-), female, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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