Influence of alumina addition on the optical property of zirconia/alumina composite dental ceramics

Abstract

The influence of various alumina additions on the optical property of zirconia/alumina composite ceramics was investigated. The relative sintered densities, transmittances, color and the microstructure of the composite ceramics were studied. The experimental results showed that the relative sintered densities and transmittances decreased with alumina addition. The lightness increased obviously but the chroma change was small. Pure zirconia nanopowders sintered densely could obtain the relatively high transmittance, while the transmittance and the lightness of slight addition changed significantly. The zirconia/alumina composite ceramics with alumina addition less than 7.5wt% could achieve the relatively stable and reliable optical properties.

Keywords

alumina addition / zirconia/alumina ceramics / transmittance / color / optical properties

References

[1] Denry I., Kelly J.R. State of the Art of Zirconia for Dental Applications[J]. Dent. Mater., 2008, 24: 299-307.

[2] Kelly J.R., Denry I. Stabilized Zirconia as a Structural Ceramic: An Overview[J]. Dent. Mater., 2008, 24: 289-298.

[3] Chevalier J., Cales B., Drouin J.M. Low-temperature Aging of Y-TZP Ceramics[J]. J. Am. Ceram. Soc., 1999, 82(8): 2150-2154.

[4] Elshazly E.S., Ali M.E., El-Hout S.M. Alumina Effect on the Phase Transformation of 3Y-TZP Ceramics[J]. J. Mater. Sci. Technol., 2008, 24(6): 873-877.

[5] Tsubakino H., Nozato R., Hamamoto M. Effect of Alumina Addition on the Tetragonal-to-monoclinic Phase Transformation in Zirconia-3mol% Yttria[J]. J. Am. Ceram. Soc., 1991, 74(2): 440-443.

[6] Choi S.R., Bansal N.P. Mechanical Behavior of Zirconia/alumina Composites[J]. Ceram. Int., 2005, 31: 39-46.

[7] Sakka Y., Suzuki T.S., Morita K., . Colloidal Processing and Superplastic Properties of Zirconia- and Alumina-based Nanocomposites[J]. Scr. Mater., 2001, 44: 2075-2078.

[8] Vasylkiv O., Sakka Y., Skorokhod V.V. Low-temperature Processing and Mechanical Properties of Zirconia and Zirconia-alumina Nanoceramics[J]. J. Am. Ceram. Soc., 2003, 86(2): 299-304.

[9] Ban S. Reliability and Properties of Core Materials for Allceramic Dental Restorations[J]. Jpn. Dent. Sci. Rev., 2008, 44: 3-21.

[10] Ban S., Nawa M., Suehiro Y., . Mechanical Properties of Zirconia/alumina Nano-composite after Soaking in Various Water-based Conditions[J]. Key Eng. Mater., 2006, 309–311: 1 219-1 222.

[11] Kelly J.R., Nishimura I., Campbell S.D. Ceramics in Dentistry: Historical Roots and Current Perspectives[J]. J. Prosthet. Dent., 1996, 75: 18-32.

[12] Heffernan M.J., Aquilino S.A., Diaz-Arnold A.M., . Relative Translucency of Six All-ceramic Restorative Systems. Part I: Core Materials[J]. J. Prosthet. Dent., 2002, 88: 4-9.

[13] Alkhunaizi R, Pober R, Giordano R. Translucency Comparison of CAD/CAM Materials[C]. In: Proceeding of 86th IADR, Metro Toronto, 2008

[14] McLaren E.A., Giordano R.A. Zirconia-based Ceramics: Material Properties, Esthetics, and Layering Techniques of a New Veneering Porcelain, VM9[J]. Quintessence of Dental Technology, 2005, 28: 99-111.

[15] Zhang Y.L., Griggs J.A., Benham A.W. Influence of Powder/liquid Mixing Ratio on Porosity and Translucency of Dental Porcelains[J]. J. Prosthet. Dent., 2004, 91: 128-135.

[16] Peelen J.G.J., Metselaar R. Light Scattering by Pores in Polycrystalline Materials: Transmission Properties of Alumina[J]. J. Appl. Phys., 1974, 45(1): 216-220.

[17] Krell A., Hutzler T., Klimke J. Transmission Physics and Consequences for Materials Selection, Manufacturing, and Applications[J]. J. Eur. Ceram. Soc., 2009, 29: 207-221.