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Preparation and characteristics of $HfO_2$ and $CeO_2$ doped 3Y-TZP block for dental ceramic block  

Ji, Sang-Yong (School of Materials Science and Engineering, Pusan National University)
Ji, Hyung-Bin (School of Materials Science and Engineering, Pusan National University)
Park, Hong-Chae (School of Materials Science and Engineering, Pusan National University)
Yoon, Seog-Young (School of Materials Science and Engineering, Pusan National University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.19, no.6, 2009 , pp. 311-317 More about this Journal
Abstract
3Y-TZP block doped with $HfO_2$ and $CeO_2$ for dental ceramic block to the proliferation of CAD/CAM systems was prepared by heating at $800{\sim}1100^{\circ}C$ and then sintering at $1450^{\circ}C$. The influences of heating temperature and addition of $HfO_2$ and $CeO_2$ on the mechanical and chemical properties of 3Y-TZP block were investigated. Using the EDS mapping images, $HfO_2$ and $CeO_2$ was well dispersed in the 3Y-TZP matrix. 3 wt% $HfO_2$ doped block showed the optimum biaxial strength (1 GPa), while 3 wt% $CeO_2$ doped block enhanced the stability of $t-ZrO_2$ under hydrothermal atmosphere.
Keywords
Dental ceramic; 3Y-TZP; Hafnia; Ceria; CAD/CAM system;
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