Preparation of high strength zirconia by epoxy gel-casting using hydantion epoxy resin as a gelling agent

Jingjing Liao, Dou Zhang, Xuewen Wu, Hang Luo, Kechao Zhou, Bo Su

Research output: Contribution to journalArticle (Academic Journal)peer-review

1 Citation (Scopus)
121 Downloads (Pure)

Abstract

In this paper, a water soluble hydantion epoxy resin (ER) was employed to prepare zirconia green bodies with high mechanical strength via epoxy gel-casting (EGC) for dental applications. The rheological properties and gelation behaviors of the suspensions, and the microstructure and mechanical strength of zirconia were systematically studied. The results revealed that solid loadings of up to 52.0 vol% could be achieved with the addition of 0.8 wt% dispersant. When the concentration of ER in the 52.0 vol% suspensions increased from 10.0 to 25.0 wt%, the mechanical strength of the resulting green bodies was enhanced from 40.96 ± 5.20 to 51.22 ± 12.01 MPa. A rough sketch of a pre-sintered zirconia crown was soft-machined from the green body consolidated from a 52.0 vol% suspension containing 10.0 wt% ER. The sintered body had a high mechanical strength of 942.77 ± 95.61 MPa.

Original languageEnglish
Pages (from-to)280-285
Number of pages6
JournalMaterials Science and Engineering C
Volume96
Early online date22 Nov 2018
DOIs
Publication statusPublished - Mar 2019

Keywords

  • Zirconia
  • Epoxy gel-casting
  • Hydantion epoxy resin
  • High strength
  • Dental applications

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