Pore structure and mechanical property of open-cell Al2O3 porous ceramic derived from boehmite

IF 6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-24 DOI:10.1016/j.ceramint.2026.07.446

An Huang, Xiulan He, Rui Gao, Ling Li

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Abstract

Open-cell Al₂O₃ porous ceramics were prepared via particle-stabilized foam method with nano boehmite as raw material using sodium lauryl sulfate as surfactant and glycerol as organic solvent. Glycerol not only regulates viscosity of slurry and stabilizes foam but also reduces the drying rate and constructs pores. Suitable sodium lauryl sulfate content can play a role of hydrophobic modification and stabilizing the foam slurry. The formation of through-pores distributed in the spherical pores is caused by the volume contraction resulting from the phase transformation of boehmite. The porous ceramics present high shrinkage rate (48.9 %∼64.79 %) and low bulk density (0.29 g cm⁻³∼0.68 g cm⁻³) owing to the phase transformation of boehmite. The compressive strength is within the range of 0.79 MPa to 9.67 MPa, and the apparent porosity is between 70.28 % and 94.31 %. The highly interconnected open-cell structure of porous ceramic can be easily adjusted through optimizing solid content, surfactant, organic solvent, and sintering temperature.

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薄水铝石制备的开孔Al2O3多孔陶瓷的孔隙结构和力学性能

以纳米薄水铝石为原料，以十二烷基硫酸钠为表面活性剂，甘油为有机溶剂，采用颗粒稳定泡沫法制备开孔Al2O3多孔陶瓷。甘油不仅可以调节浆料的粘度，稳定泡沫，还可以降低干燥速度，构建孔隙。适当的十二烷基硫酸钠含量可以起到疏水改性和稳定泡沫浆的作用。分布在球形孔隙中的通孔的形成是由薄水铝石相变引起的体积收缩引起的。由于薄水铝石的相变，多孔陶瓷具有高收缩率（48.9 % ~ 64.79 %）和低容重（0.29 g cm−3 ~ 0.68 g cm−3）。抗压强度为0.79 MPa ~ 9.67 MPa，表观孔隙率为70.28 % ~ 94.31 %。通过优化固体含量、表面活性剂、有机溶剂和烧结温度，可以很容易地调节多孔陶瓷的高度互联的开孔结构。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.