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Surface Dissolution of Hydroxyapatite Prepared by Microwave Sintering

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Abstract:

The aim of this study was to prepare dense hydroxyapatite (HA) by microwave sintering and to evaluate the dissolution behavior in distilled water. Commercially-obtained HA powders having Ca/P ratio of 1.67 were used as a starting material. The as-received powder of granular type consists of nano-sized particles. Microwave sintering was operated at 1200°C for 5 min with a heating rate of 50°C/min. Microwave sintering process reduced grain size of HA, compared with the case of conventional sintering. During the immersion in distilled water for 3-14 days, grain boundary dissolution occurred and the dissolution extended into the bulk following this path. As a result, particles were separated from the structure leaving micron-scale defects.

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Periodical:

Key Engineering Materials (Volumes 330-332)

Pages:

227-230

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.330-332.227

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Online since:

February 2007

Authors:

Dong Seok Seo, Hwan Kim, Kyu Hong Hwang, Jong Kook Lee

Keywords:

Dissolution, Grain Boundary, Hydroxyapatite (HAP), Microwave Sintering

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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