凝胶-发泡法制备多孔Al<sub>2</sub>O<sub>3</sub>陶瓷及其力学性能

doi:10.11896/cldb.201904008

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Abstract Alumina porous ceramics were fabricated by gelcasting and pressureless sintering method by using agarose as monomer, sodium dodecyl sulfonate as foaming agent and MgO+TiO₂ as sintering aids. The effects of different contents of foaming agent and solid phase on the microstructure and mechanical properties of Al₂O₃ porous ceramic were investigated. The curing mechanism of agarose gel system was also studied. The results showed that the formation of 3D network structure of agarose during cooling process causes the in-situ solidification of the raw ceramic powders. The sodium dodecyl sulfonate displays satisfactory foaming ability and foam stabilizing ability. The appropriate solid content and foaming agent content were beneficial to the fabrication of porous Al₂O₃ ceramics with high porosity and moderate compressive strength. The highest porosity of Al₂O₃ porous ceramic in this work reached 85.2%.

Key words： alumina(Al₂O₃) porous ceramic gelcasting agarose foaming agent mechanical property

Published: 11 March 2019

CLC number:

TB34

Fund:This work was financially supported by the National Natural Science Foundation Youth Fund of China (51302053), the Harbin Project of Outstanding Academic Leaders(2017RAXXJ078).

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	Articles by authors
	HE Xiulan
	DU Yan
	GONG Qingdong
	ZHENG Wei
	LIU Junwang

Cite this article:

HE Xiulan,DU Yan,GONG Qingdong, et al. Fabrication and Mechanical Properties of Porous Al₂O₃ Ceramics by Gel-foaming Process[J]. Materials Reports, 2019, 33(4): 607-610.

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http://www.mater-rep.com/EN/10.11896/cldb.201904008 OR http://www.mater-rep.com/EN/Y2019/V33/I4/607

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