Complex mullite structures fabricated via digital light processing of a preceramic polysiloxane with active alumina fillers |
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| Affiliation: | 1. Department of Industrial Engineering, University of Padova, Italy;2. Lithoz GmbH, Mollardgasse 85a/2/64-69, 1060 Vienna, Austria;3. Department of Materials Science and Engineering, the Pennsylvania State University, University Park, PA 16801, United States;1. Additive Manufacturing Institute, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China;2. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China;3. Department of Automation, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China;4. Department of Chemistry and the Tsinghua Center for Frontier Polymer Research, Tsinghua University, Beijing 100084, China;1. Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China;2. School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China;3. School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai, 201418, China;1. Dipartimento di Ingegneria Industriale, University of Padova, Via Marzolo 9, 35131 Padova, Italy;2. Ceramics Department, National Research Centre, El-Bohous Street, 12622 Cairo, Egypt;3. Department of Materials Science and Engineering, the Pennsylvania State University, University Park, PA 16801, United States;1. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, 100081, PR China;2. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, PR China;3. Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing, 100081, PR China;4. School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu, 241000, PR China;1. School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea;2. Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, South Korea |
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| Abstract: | By taking advantage of the multi-functional properties of preceramic polymers, their transformation into ceramic material at low sintering temperatures and the processing capabilities of polymer manufacturing processes, mullite components were fabricated by additive manufacturing. A photocurable silicone preceramic polymer resin containing alumina particles was shaped into complex structures via Digital Light Processing. Dense and crack-free, highly complex porous mullite ceramics were produced by firing a mixture of a commercially available photosensitive polysiloxane as the silica source, containing alumina powder as active filler, in air at a low sintering temperature (1300 °C). In particular, the developed formulations, coupled with the additive manufacturing approach, allow for precise control of the architecture of the porous ceramic components, providing better properties compared to parts with stochastic porosity. |
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| Keywords: | Preceramic polymers Active fillers Additive manufacturing Digital light processing Stereolithography |
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