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Near Net Size Preparation and Properties of Porous Mullite Ceramics
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Hao YAN1, 2, Shile CHEN2, Ying LANG1, Chang'an WANG2
Journal of the Chinese Ceramic Society | 2022, 50(3) : 698 - 703
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Journal of the Chinese Ceramic Society | 2022, 50(3): 698-703
• Research Articles •
Near Net Size Preparation and Properties of Porous Mullite Ceramics
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Hao YAN1, 2, Shile CHEN2, Ying LANG1, Chang'an WANG2
Affiliations
  • 1.School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China
  • 2.State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

    • YAN Hao (1997-), male, Master candidate. E-mail:

About Author:

YAN Hao (1997-), male, Master candidate. E-mail:

Published: 2022-03-20 doi: 10.14062/j.issn.0454-5648.20210751
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Near net size preparation of porous mullite ceramics with controllable shrinkage was achieved via gel casting and pore-forming agent process With Al2O3 and kyanite as raw materials, PMMA microspheres as a pore-forming agent, and isobutylene/maleic anhydride copolymer (Isobam104) as a gelling/dispersing agent. The effect of sintering temperature on the phase composition and the effect of solid loading on the microstructure, phase composition, shrinkage, porosity, and compressive strength of samples were investigated. The results show that the shrinkage of samples sintered at 1 500 ℃ firstly decreases and then increases as the solid loading increases. At the solid loading of 30%(in volume fraction) and the content of pore forming agent of 30%(in mass fraction), the total shrinkage of the samples is close to zero, realizing the near net size preparation of porous mullite ceramics. The prepared porous mullite ceramics exhibite a higher porosity (i.e., 60.4%), a smaller average pore size (i.e., 3.75 μm) and a higher compressive strength (i.e., 8.3 MPa). The shrinkage of porous ceramics can be effectively controlled by the volume expansion effect in the preparation process, and the near net size preparation of porous mullite ceramics is of great significance for the preparation of large-size and complex porous ceramic parts and the reduction of processing cost.

porous mullite ceramics  /  gelcasting  /  pore forming agent  /  near net size preparation
颜浩, 陈仕乐, 郎莹, 汪长安. 多孔莫来石陶瓷的近净尺寸制备及性能. 硅酸盐学报, 2022 , 50 (3) : 698 -703 . DOI: 10.14062/j.issn.0454-5648.20210751
Hao YAN, Shile CHEN, Ying LANG, Chang'an WANG. Near Net Size Preparation and Properties of Porous Mullite Ceramics[J]. Journal of the Chinese Ceramic Society, 2022 , 50 (3) : 698 -703 . DOI: 10.14062/j.issn.0454-5648.20210751
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Year 2022 volume 50 Issue 3
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Article Info
doi: 10.14062/j.issn.0454-5648.20210751
  • Receive Date：2021-08-31
  • Online Date：2026-10-22
  • Published：2022-03-20
Article Data
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History
  • Received：2021-08-31
  • Revised：2021-09-16
Funding
Affiliations
    1.School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China
    2.State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Corresponding:

WANG Chang'an (1969-), male, 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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