Articles
  • Layer by layer fabrication of zirconia by different UV light position approaching in digital light processing method

  • So-Young Koa, Kyoung-Jun Jangb and Sang-Jin Leea,c,*

  • aDepartment of Advanced Materials Science and Engineering, Mokpo National University, Muan 58554, Republic of Korea
    bResearch Institute, 3D Controls Co., Ltd, Busan 46721, Republic of Korea
    cResearch Institute of Ceramic Industry and Technology, Mokpo National University, Muan 58554, Republic of Korea

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The digital light processing (DLP) 3D printing method can be used to achieve continuous ceramic laminations during additive manufacturing. However, it has limited applications because its green body, which is photocured by adding a resin and photoinitiator to the ceramic powder, cracks during the debinding process. In this study, we used four types of acrylic resins with low functional groups and mixed 82 wt% zirconia powder with the photoinitiator and dispersant to prepare a slurry. Under a certain content of photoinitiator, the photocured zirconia green body was prepared by controlling the light intensity conditions of 32 W/m2 and 38 W/m2, and the light exposure time of 3s and 7s, respectively. Furthermore, we conducted experiments focused on the condition of photocuring green body according to the printing approach based on the UV light position, as well as cracking of the green body after the debinding process. The position of the UV light influenced the continuous lamination behavior and intervention of oxygen during photocuring, and based on these results, we investigate the differences in the laminated layer interphase of the photocured green body and its relationship to cracking with the debinding behavior.


Keywords: Ceramic 3D printing, Digital Light Processing (DLP), Photocuring, Zirconia, Debinding.

This Article

  • 2025; 26(1): 91-101

    Published on Feb 28, 2025

  • 10.36410/jcpr.2025.26.1.91
  • Received on Oct 7, 2024
  • Revised on Jan 20, 2025
  • Accepted on Feb 5, 2025

Correspondence to

  • Sang-Jin Lee

  • aDepartment of Advanced Materials Science and Engineering, Mokpo National University, Muan 58554, Republic of Korea
    cResearch Institute of Ceramic Industry and Technology, Mokpo National University, Muan 58554, Republic of Korea
    Tel : +82-10-5587-6919 Fax: +82-61-450-2498

  • E-mail: lee@mokpo.ac.kr