Fabrication and characterisation of cellular alumina articles produced via radiation curable dispersions |
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| Authors: | Judit Wilkens-Heinecke Yoram de Hazan Sascha Populoh Christos G Aneziris Thomas Graule |
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| Affiliation: | 1. Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology, Switzerland;2. Institute of Ceramic, Glass and Construction Materials, TU Bergakademie Freiberg, Germany;3. Laboratory for Solid State Chemistry and Catalysis, Empa, Swiss Federal Laboratories for Materials Science and Technology, Switzerland;1. Taiyuan University of Technology, Taiyuan 030024, China;2. Qingdao Binhai University, Qingdao 266555, China;1. Institute of Mineralogy, Ural Branch of the Russian Academy of Sciences, 456317 Miass, Russian Federation;2. Machine-building Department, South-Ural State University, 456304 Miass, Russian Federation;3. Department of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation;1. Department of Mechanical and Energy Engineering, National Chiayi University, No. 300, Syuefu Road, Chiayi City 600, Taiwan;2. Center of Energy Research & Sensor Technology, National Chiayi University, No. 300, Syuefu Road, Chiayi City 600, Taiwan;3. Department of Biomechatronic Engineering, National Chiayi University, No. 300, Syuefu Road, Chiayi City 600, Taiwan |
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| Abstract: | A general and versatile method for the production of cellular materials from radiation curable solvent-free colloidal ceramic dispersions containing pore formers has been developed. By this technique cellular ceramic articles with a precisely controlled porosity, cell size and shape are obtained for compositions containing solid pore formers. Monolithic bulk samples are obtained by thermal curing, whereas thin films and multi-layered articles are advantageously produced by UV curing. In this work the influence of three different spherical pore former types, PE, PS and PMMA, on the processing and final properties of the porous materials using alumina as model material is studied. The effect of pore former type and concentration on rheology, curing behaviour, debinding and sintering steps as well as thermal conductivity and mechanical strength of the sintered cellular materials is presented. It is also shown that the choice of pore former type modifies the sintering behaviour and resulting properties. |
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