The Influence of Microstructure on the Surface Charge of Sintered Hydroxyapatite Ceramics

Key Engineering Materials. Vol.800: Materials Science and Applied Chemistry II: Selected, peer reviewed papers from the 59th International Scientific Conference of Riga Technical University (RTU), Section of Materials Science and Applied Chemistry - MSAC 2018 2019
Dārta Ūbele-Kalniņa, Liene Plūduma, Kārlis-Agris Gross

Hydroxyapatite (HAp) has shown the ability to store a charge induced by electrical polarization a method potential for improved bone ingrowth. In this work electrical polarization was carried out on HAp ceramics with three different microstructures, obtained at three different sintering temperatures. Microstructure of the sintered HAp was evaluated from density measurements and SEM observations. Sintered HAp tablets were electrically polarized in an electric field of 5 kV/cm at 400 °C for 1h. Surface charges investigated by thermally stimulated depolarization current measurements showed 104,8 μC/cm2 for denser tablets, while charge density of 22,8 μC/cm2 was obtained for less dense tablets.

Keywords
Contact Angle, Electrical Polarization, Hydroxyapatite, Microstructure, Surface Charge
DOI
10.4028/www.scientific.net/KEM.800.25
Hyperlink
https://www.scientific.net/KEM.800.25

Ūbele, D., Plūduma, L., Gross, K. The Influence of Microstructure on the Surface Charge of Sintered Hydroxyapatite Ceramics. In: Key Engineering Materials. Vol.800: Materials Science and Applied Chemistry II: Selected, peer reviewed papers from the 59th International Scientific Conference of Riga Technical University (RTU), Section of Materials Science and Applied Chemistry - MSAC 2018, Latvia, Riga, 26-26 October, 2018. Switzerland: Trans Tech Publications, 2019, pp.25-29. ISSN 1013-9826. e-ISSN 1662-9795. Available from: doi:10.4028/www.scientific.net/KEM.800.25

Publication language
English (en)