Abstract Macroporous refractory ceramics were prepared with Al2O3-based particle stabilised foams in which ceramic particles were partially hydrophobized with propionic acid or l-leucine. Calcium aluminate cement (CAC) as dry powder or stable aqueous suspension were added as binders. Cement addition resulted in solid foams whereby setting took place in less than 24h. Highly porous samples were attained with leucine-based foams whereas the propionic-acid ones were not stable after CAC addition. For leucine-based foams, fired samples with homogeneous microstructures, both high porosity (∼80 %) and cold crushing strength (∼30 MPa) were attained when CAC aqueous suspension was used instead of CAC dry powder. These results were associated to the better dispersion of cement particles in the foam structure when CAC liquid binder was used and pointed out the advantages of this suspension for producing solid macroporous ceramics based on particle-stabilised foams.

中文翻译：

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铝酸钙水泥水悬浮液作为 Al2O3 基颗粒稳定泡沫的粘合剂

摘要 采用丙酸或L-亮氨酸对陶瓷颗粒进行部分疏水化处理，以Al2O3 基颗粒稳定泡沫制备大孔耐火陶瓷。添加干粉或稳定的水悬浮液形式的铝酸钙水泥 (CAC) 作为粘合剂。添加水泥产生固体泡沫，从而在不到 24 小时内发生凝固。使用亮氨酸基泡沫获得高度多孔的样品，而丙酸泡沫在添加 CAC 后不稳定。对于基于亮氨酸的泡沫，当使用 CAC 水悬浮液代替 CAC 干粉时，具有均匀微观结构的烧制样品可以获得高孔隙率（~80%）和冷抗压强度（~30 MPa）。