Structure and properties study of magnesium oxide porous ceramics prepared by Organic Foam Template Method

Advances in Applied Ceramics: Structural, Functional and Bioceramics Pub Date : 2024-01-23 DOI:10.1177/17436753231213006

Minghui Sun, Shaolong Wang, Yani Zhang, Tun Wang, Shengchun Li, Lei Zhang, F. Lei, Lingcong Fan, Ying Shi, Jianjun Xie

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Abstract

Magnesium oxide (MgO) porous ceramics with high porosity, compressive strength and low thermal conductivity were prepared by Organic Foam Template Method. The effects of the sintering temperature, polycarboxylic acid (PCE) dispersant and pore size of organic foam template on the properties of MgO porous ceramics were investigated. The experiment results showed that with the increase of sintering temperature, the MgO porous ceramic shrinkage, skeleton density and compressive strength increased. PCE could increase the fluidity of slurry and make the framework clearer, as well as reduce the cracks formed in the process of drying effectively. When the content of PCE was 0.5 wt-%, the porosity, compressive strength and thermal conductivity of MgO porous ceramics were 88.5%, 1.6 MPa and 0.045 W/(m·K), respectively. In addition, as the pore size of the organic foam template decreased, the porosity decreased, and the resistance increased and the thermal conductivity increased.

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有机泡沫模板法制备的氧化镁多孔陶瓷的结构与性能研究

采用有机泡沫模板法制备了具有高孔隙率、高抗压强度和低热导率的氧化镁（MgO）多孔陶瓷。研究了烧结温度、聚羧酸（PCE）分散剂和有机泡沫模板孔径对氧化镁多孔陶瓷性能的影响。实验结果表明，随着烧结温度的升高，氧化镁多孔陶瓷的收缩率、骨架密度和抗压强度都有所增加。聚合氯化铝能增加浆料的流动性，使骨架更加清晰，并能有效减少干燥过程中产生的裂纹。当 PCE 的含量为 0.5 wt-% 时，氧化镁多孔陶瓷的孔隙率、抗压强度和导热系数分别为 88.5%、1.6 MPa 和 0.045 W/(m-K)。此外，随着有机泡沫模板孔径的减小，孔隙率减小，抗压强度增大，导热系数增大。

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Advances in Applied Ceramics: Structural, Functional and Bioceramics

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