Preparation of Nano-Ceramic Composite as Dental Prosthetic Material
Zirconia toughened alumina (ZTA) nano-ceramic composite has excellent mechanical properties. Preparation of ZTA was conducted in the present study with an attempt to use as dental ceramics. On the basis of the study on the effect of the die pressing forces on the density and Vickers hardness of the sintered ZTA, additive aids TiO2, MgO, SiO2 and CaO were introduced in order to reduce the sintering temperature of ZTA nano-ceramic composite with good densification. Scanning electron microscopy was employed to evaluate the microstructural morphology. Phase composition was confirmed by using X-ray diffraction. Thermal analysis was further used to study the structural change. The results indicated that the ZTA product sintered at 1450°C had dense and uniform microstructure due to the combinative effect of additive aids, including the formation of an intermediate compound. This study suggested that such ZTA nano-ceramics had potential applications as dental prosthetic materials.
Young-Ha Kim, Chong-Su Cho, Inn-Kyu Kang, Suk Young Kim and Oh Hyeong Kwon
J. Ma et al., "Preparation of Nano-Ceramic Composite as Dental Prosthetic Material", Key Engineering Materials, Vols. 342-343, pp. 645-648, 2007