Synthesis of Coloured Dental Zirconia Ceramics and their Mechanical Behaviors

Abstract:

The effects of Pr₆O₁₁ and Er₂O₃ dopants on microstructure and mechanical properties of zirconia ceramics were investigated. The phase composition and microstructure analysis indicate that samples are all tetragonal phase and grain size is about 50-100 nm. The relative density of zirconia ceramics was above 99.1%, linear shrinkage was nearly 20%, while Vickers hardness was over 12.5 GPa. Three-points bending strength was over 850 MPa which was slightly lower than that of the pure samples, and fracture toughness was above 4.9 MPa*m^1/2. The results show that the dopants can be used to obtain the colored zirconia ceramic, and also have effects on its mechanical properties.

• Periodical: Key Engineering Materials (Volumes 602-603)
• Pages: 594-597
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.602-603.594
• Online since: March 2014
• Authors: Jing Li, Shi Ming Liu, Yuan Hua Lin*
• Keywords: Er₂O₃, Mechanical Property, Pr₆O₁₁, Zirconia

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