Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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A Study on the Mechanical Properties Based on Frit Addition in 3Y-TZP Zirconia Composition

3Y-TZP Zirconia 조성에서 Frit의 첨가에 의한 기계적 특성 연구

  • Kwon, Eun-Ja (Dept. of Dental Technology, Hyejeon College) ;
  • Lee, Gyu-Sun (Dept. of Dental Technology, Dongnam Health College) ;
  • Lee, Chae-Hyun (Dept. of Information & Electronic Materials Engineering, Paichai University)
  • 권은자 (혜전대학 치기공과) ;
  • 이규선 (동남보건대학 치기공과) ;
  • 이채현 (배재대학교 정보전자소재공학과)
  • Published : 2007.07.10
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Abstract

This study was to add crushed frit with different grain sizes to 3Y-TZP so that it could determine the mechanical properties depending on sintering temperature. In this study, 3 types specimens were prepared in powder with respective additions of 20wt.% frit, which was sized through 24-, 48- and 72-hour ball milling with zirconia. Then, sintered pellets were tested in experiments under the temperature variations for different compositions. As a result, this study came to the following findings: 1. It was found that the higher sintering temperature and the longer ball milling time of frit led to the higher sintered density. 2. Bending strength tended to increase with higher sintering temperature and longer ball milling time of frit. 3. Hardness tended to increase with higher sintering temperature and longer ball milling time of frit. 4. However, it was found that fracture toughness didn't vary significantly depending on sintering temperature. From these findings, it was concluded that the smaller frit grain size and the narrower particle size distribution of frit lead to the better mechanical properties.

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