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Preparation of porous MgAl2O4 ceramics by a novel pectin gel-casting process

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Abstract

In this paper, a novel pectin gel-casting method was developed to prepare porous MgAl2O4 ceramics using MgO and Al2O3 powders as raw materials and ficus pumila seeds as the gel source. The effects of pectin content on the properties of MgAl2O4 porous ceramics, such as phase composition, microstructural characteristics, apparent porosity, bulk density, compressive strength, and thermal conductivity, were investigated. The results showed that the linear shrinkage of the samples was about 5%, indicating a near-net shape method. With the increase of pectin content, the porosity of porous MgAl2O4 ceramics increased significantly. The prepared MgAl2O4 porous ceramics with different pectin contents showed high apparent porosity of 58.7–70.1%, low thermal conductivity of 0.328–0.840 W/(mK), and relatively high compressive strength of 0.27–2.45 MPa. The proposed method as a near-net shape forming method provided a novel feasible gel-casting method to fabricate other porous ceramics.

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Funding

The authors would like to express their gratitude for the financial support from the National Natural Science Foundation of China (Grant No. 51974074, No. 51874083, No. 51932008, No. 52074070) and the Fundamental Research Funds for the Central Universities (N2025036).

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Authors and Affiliations

  1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang, 110819, People’s Republic of China

    Lei Yuan, Chen Tian, Xinhua Yan, Xiao He, Zhenli Liu, Tianpeng Wen, Endong Jin & Jingkun Yu

  2. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, People’s Republic of China

    Jingkun Yu

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  1. Lei Yuan
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  2. Chen Tian
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  3. Xinhua Yan
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Correspondence to Chen Tian.

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Yuan, L., Tian, C., Yan, X. et al. Preparation of porous MgAl2O4 ceramics by a novel pectin gel-casting process. J Aust Ceram Soc 57, 1049–1055 (2021). https://doi.org/10.1007/s41779-021-00606-0

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