Synthesis and Characterization of Porous ZrO₂-Y₂O₃-TiO₂ Ceramics Prepared by Coprecipitation

Abstract:

Zirconium dioxide (zirconia) ceramics are known by its high strength and toughness and titanium dioxide (titania) ceramics has outstanding surface properties. The ceramic composite formed between the two oxides are expected to have advantages of both ceramics, especially when its surface area is increased by pores. In this work, ceramic composites of ZrO₂-Y₂O₃-TiO₂ were synthesized by coprecipitation and rice starch was added as pore former in 10, 20 and 30 wt%. Powders were cold pressed as cylindrical pellets and sintered at 1500 °C for 01 hour and ceramics were characterized by techniques as Archimedes method for density measurements, X-ray diffraction and scanning electron microscopy. Results showed that pores are inhomogeneously distributed through ceramic bodies.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 1387-1392
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.1387
• Online since: August 2012
• Authors: Luan M. Medeiros, Fernando S. Silva, Juliana Marchi, Walter Kenji Yoshito, Dolores Ribeiro Ricci Lazar, Valter Ussui
• Keywords: Ceramic, Pore Formers, Titania, Y-TZP

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