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Time-Dependent Rheological Behavior of Liquid Crystalline Dispersions
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Preparation of Size Controlled Nanometric Spheres of Colloidal Silica for Synthetic Opal Manufacture
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Bioactive Zirconia Composites
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Bioactive Zirconia Composites

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Abstract:

Zirconia-alumina composites with additions of a CaO-SiO2 glass are prepared by uniaxial pressing and sintering. In order to promote bioactivity, the composites are biomimetically treated. The effect of immersion time in simulated body fluids (SBF) and that of the presence of a wollastonite powder bed, as a calcium ion provider, on the apatite forming ability are investigated. The influence of replacing the simulated body fluids each 7-day-period for a more concentrated solution is also studied. A bonelike apatite layer is observed after 21 days of immersion when the SBF is renewed, whether the bed of wollastonite powder is present or not. However, a thicker layer is formed by using wollastonite and the agglomerates of the apatite layer are finer on the composites containing CaO-SiO2 glass.

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Periodical:

Materials Science Forum (Volume 509)

Pages:

193-198

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.509.193

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Online since:

March 2006

Authors:

Akemi A. Nogiwa-Valdez, Dora A. Cortés-Hernández, J.M. Almanza-Robles, Alejandra Chávez-Valdez

Keywords:

Bioactivity, Biomimetic Process, Simulated Body Fluid (SBF), ZrO2-Al2O3 Composites

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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