Study on Properties of Leucite for Dental Porcelain Compositions

Abstract:

Leucite crystal was prepared using SiO₂-Al₂O₃-K₂CO₃-Na₂CO₃ as raw materials and adopting melt quenching and appropriate heat treatment temperatures. The crystal was characterized and analyzed by X-ray powder diffraction, the coefficient of thermal expansion, and biocompatibility. The results showed that appropriate Na₂O could advance the growth of leucite, but high concentration facilitates the formation of KAlSiO₄ crystal. The coefficient of thermal expansion was 24.52×10^-6/°C at 600 °C, and thereby the coefficient could be adjusted by adding appropriate amount of leucite. The biocompatibility of leucite was almost the same as the Songfeng powder for clinical applications.

• Periodical: Applied Mechanics and Materials (Volumes 66-68)
• Pages: 1522-1527
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.66-68.1522
• Online since: July 2011
• Authors: Li Na Sui, Li Yan Yu, Li Feng Dong
• Keywords: Biocompatibility, Coefficient of Thermal Expansion, Leucite, X-Ray Diffraction (XRD)

References

[1] S. Lee, H. Kim, S. Byeon, J. Park and D. Kim: Ind. Eng. Chem. Res. Vol. 44 (2005), p.4300.

[2] K.F. Leinfelder: J. Am. Dent. Assoc. Vol. 131 (2000), p.47.

[3] Y.M. Qu, Y. Zhang and J.P. Yang: B. Chinese Ceram. Soc. Vol. 25 (2006), p.87.

[4] J.R. Kelly, I. Nishimura and D. Stephen: J. Prosthet. Dent. Vol. 75 (1995), p.18.

[5] M.G. Zhang, Ch.F. Yu, X.P. Zhu and Q. Ling: China Ceram. Ind. Vol. 11 (2004), p.36.

[6] J.R. Jr. Mackert, M.B. Butts and C.W. Fairhurst: Dent. Mater. Vol. 2 (1986), p.32.

[7] B. Zhang: Beijing J. Stomatology, Vol. 7 (1999), p.44.