Effect of organic fibers addition on digital light processing for Al2O3 porous ceramics. Issue 16 (15th August 2021)

• Record Type: Journal Article
• Authors: Zhao, Pengcheng; Hu, Kehui; Wang, Haoyuan; Li, Xinyi; Lu, Zhigang
• Is Part Of: Ceramics international. Volume 47:Issue 16(2021)
• Page Start: 23144
• Page End: 23152
• Publication Date: 2021-08-15
• Subjects: Connected channels -- Porous ceramics -- DLP -- Organic fibers; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.05.028
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Porous ceramics based on additive manufacturing have great application potential in many industries, including filtration, catalysis, and heat insulation. In this research, we propose a method for manufacturing porous ceramics with connected channels structure through ceramic digital light processing (DLP) and organic fiber decomposition. The crossed fibers in the green body, working as a pore-forming agent, were decomposed and removed to form connected channels in ceramic. It was confirmed that ball milling changed the fiber morphology during slurry preparation, which was beneficial to promote fibers crossing. Besides, we focused on the influence of the "Sponge Compression effect" during the DLP process, which affected the fibers distribution. The existence of fibers in the green body resulted in uneven pressure distribution during the debinding process, providing a potential source of cracks. Results show that this method can produce channels with a diameter of 100 μm and high connectivity, providing great potential in fabricating high connectivity porous ceramics with complex shapes and structures.