Fabrication and properties of alumina ceramics shaped by digital light processing as an additive manufacturing technology. Issue 1 (28th September 2021)

• Record Type: Journal Article
• Authors: Zhang, Ling; Huang, Jingyin; He, Yu; Liu, Kaige; Xiang, Bingxi; Zhai, Jianpang; Kong, Ling Bing; Zhang, Tianshu; Liu, Yin
• Is Part Of: International journal of applied ceramic technology. Volume 19:Issue 1(2022)
• Page Start: 281
• Page End: 288
• Publication Date: 2021-09-28
• Subjects: alumina -- cure depth -- densification -- digital light processing -- photopolymerization; Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.13895
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract: Ceramic slurries with different contents of Al2 O3 were formulated and alumina ceramic parts with promising surface morphology were fabricated by using digital light processing photopolymerization‐based additive manufacturing technology. The factors influencing curing depth of the slurries were studied, while the effects of powder content on shrinkage of the green bodies and microstructure, density, and hardness of the sintered bodies were evaluated. Although the curing depth was decreased with increasing content of Al2 O3, all the five groups of slurries could be well cured, as the exposure time was set to be 16 s. According to TG‐DTG curves, the weight loss of the samples was completed at about 580°C. Samples from the slurries with 70 and 75 wt.% Al2 O3 had dense microstructure, without obvious cracks at both the macro‐ and micro‐scales. Furthermore, with increasing content of Al2 O3 in slurries, the bulk density and hardness of sintered bodies were increased. It is believed that our results could be used as a reference for the fabrication of alumina ceramics through additive manufacturing technology.