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Publication

Iron oxide colouring of highly-translucent 3Y-TZP ceramics for dental restorations

Journal Contribution - Journal Article

© 2018 Elsevier Ltd The influence of 0.01–2 mol% Fe 2 O 3 powder addition on the microstructure, mechanical and optical properties, and hydrothermal stability of highly-translucent 3Y-TZP ceramics is assessed and compared with commercially available co-precipitated 0.18 mol% Fe 2 O 3 doped ZrO 2 powder-based ceramics. Only those ceramics with up to 0.1 mol% Fe 2 O 3 resulted in a proper shade for dental zirconia ceramics, with a typical composition of 87 vol% t-ZrO 2 and 13 vol% c-ZrO 2 . The amount of cubic phase increased at higher Fe 2 O 3 content. The hardness (∼13 GPa) and fracture toughness (∼3.6 MPa m 1/2 ) of the 0.01 mol% - 0.1 mol% Fe 2 O 3 doped 3Y-TZP was comparable, whereas the hardness decreased above 0.5 mol% Fe 2 O 3 and the fracture toughness decreased above 2 mol% Fe 2 O 3 . The hydrothermal ageing resistance slightly increased for Fe 2 O 3 concentrations up to 1 mol%, whereas the translucency slightly decreased with increasing Fe 2 O 3 content.
Journal: Journal of the European Ceramic Society
ISSN: 0955-2219
Issue: 2-3
Volume: 39
Pages: 499 - 507
Number of pages: 9
Publication year:2019
Keywords:Materials science