Journal of Iranian Ceramic Society
Journal of Iranian Ceramic Society
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Saveh Branch, Islamic Azad University , ahmadi.hamidreza@gmail.com
Abstract: (55 Views)
In this study, the effect of different percentages of TiO2 at different temperatures on the microstructure and formation of the leucite phase in PFM dental porcelain was investigated. TiO2 additive was added to the dental porcelain with amounts of 1, 3 and 5% and uniformly mixed in the form of tablets with dimensions of 5x18 mm with a pressure of 500 newtons and at temperatures of 850, 900, 930 and 980 degrees Celsius for a period of time. They were sintered for an hour. The physical properties of bulk density, apparent density, apparent porosity, water absorption and firing shrinkage were measured. XRD phase analysis and SEM microscopic imaging were also used to investigate the phase microstructure of the samples. The results showed that 5% TiO2 increases the bulk and apparent densities by 22.3% at 980 °C. The results also showed that the highest amount of leucite phase was formed at 900 °C, so that the highest relative intensity of the leucite phase peak for the PT5 900 sample, with 5% TiO2 at 900 °C, reached 82.56%.
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