Preparation of low shrinkage and high surface accuracy Al2O3-based ceramics via water-based binder jetting combined with sintering aid

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-09-10 DOI:10.1016/j.jeurceramsoc.2025.117812

Li Yang, Jingfei Liu, Shiyan Tang, Zhiyuan Yang, Youheng Fu, Zitian Fan

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Abstract

The binder jetting method possesses the advantages of high efficiency and low cost, and is widely used in the preparation of ceramics. However, this technology uses organic binders, which leads to the low strength of ceramic green bodies after sintering. Currently, impregnation is primarily used to enhance the strength of ceramics. In this study, the properties of Al₂O₃-based ceramics were enhanced by introducing different minerals (kyanite, andalusite and sillimanite) that decompose and form a mullite phase at high temperatures, resulting in a secondary mullite reaction. The results show that when andalusite was added to the Al₂O₃ matrix material, the samples exhibited relatively good properties. The samples with different andalusite contents (5, 10, 15 wt%) were sintered at 1500, 1550 and 1600 °C, respectively. The bulk density, apparent porosity and bending strength of the samples were 1.82–2.06 g·cm⁻³, 47.5–52.01 % and 16.99–34.19 MPa, respectively.

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水基粘结剂喷射结合助烧剂制备低收缩率、高表面精度的al2o3基陶瓷

粘结剂喷射法具有效率高、成本低的优点，在陶瓷的制备中得到了广泛的应用。然而，该技术使用有机粘结剂，导致陶瓷坯体烧结后强度较低。目前，浸渍主要用于提高陶瓷的强度。在本研究中，通过引入不同的矿物（蓝晶石、红柱石和硅线石），在高温下分解形成莫来石相，从而产生二次莫来石反应，增强了al2o3基陶瓷的性能。结果表明：在Al2O3基体材料中加入红柱石后，样品具有较好的性能；不同红柱石含量（5、10、15 wt%）的样品分别在1500、1550和1600℃下烧结。试样的容重、表观孔隙率和抗弯强度分别为1.82 ~ 2.06 g·cm−3、47.5 ~ 52.01 %和16.99 ~ 34.19 MPa。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.