Preparation and properties of alumina foams via thermally induced foaming of molten d-glucose monohydrate

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• 作者：Keke Huang ; Yuanbing Li ; Shujing Li ; Ruofei Xiang
• 关键词：Alumina ; Foams ; Microstructure ; Pore distribution ; Compressive strength
• 刊名：Journal of Porous Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：24
• 期：1
• 页码：121-128
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Catalysis; Characterization and Evaluation of Materials; Physical Chemistry;
• 出版者：Springer US
• ISSN：1573-4854
• 卷排序：24

文摘

Alumina foams with porosity of 92.6–94.4 % were obtained by thermally induced foaming of powder dispersions in molten d-glucose monohydrate. Effects of alumina to d-glucose monohydrate weight ratio on the preparation and properties of the alumina foams were investigated. The bubbles generated in molten d-glucose monohydrate were stabilized by alumina particles adsorbed at the gas–liquid interface and the increase in viscosity of the dispersions. The foam rise decreased with the increase in alumina to d-glucose monohydrate weight ratio up to 1.2 and then slightly increased. The alumina foams showed cellular microstructure and the cells had a near spherical morphology. Increasing alumina to d-glucose monohydrate weight ratio widened the cell and window size distribution. The density and compressive strength of the alumina foam showed a maximum at alumina to d-glucose monohydrate weight ratio of 1.2. The corresponding maximum density and compressive strength were 0.293 g/cc and 1.14 MPa, respectively.