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Title: Investigation of HA cement preparation and properties by using central composite design
Authors: Çetin, Ali Emrah
Şimşek, Deniz
Çiftçioğlu, Muhsin
Akdeniz, Yelda
Özmıhçı, Filiz
Aykut Yetkiner, Arzu
Keywords: Composite design
Compressive strength
HA cement
Setting time
Publisher: Trans Tech Publications
Source: Çetin, A. E., Şimşek, D., Çiftçioğlu, M., Akdeniz, Y., Özmıhçı, F., and Aykut Yetkiner, A. (2012). Investigation of HA cement preparation and properties by using central composite design. Key Engineering Materials, 493-494, 381-386. doi:10.4028/
Abstract: The goal of the present work was to investigate the effects of several cement preparation parameters on setting and hardening reaction mechanisms and hydroxyapatite (HA) cement properties. A central composite experimental design (CCD) was conducted by choosing particle size, solid to liquid ratio, pH, seed concentration and buffer concentration as design parameters along with compressive strength and setting time being the responses. Tetracalcium phosphate (TTCP) powders were prepared by heat treatment of calcium and phosphate source mixtures in the 1200-1400°C temperature range followed by quenching to room temperature in a dessicator. The second phase used in the formulations (brushite) was prepared by aqueous chemical methods. A series of HA pastes/cements were prepared by changing the above mentioned design parameters. Cements were characterized by a standardized setting time test, mechanical testing machine, SEM and XRD. HA cements with the desired properties can be formulated by using CCD in which the responses were expressed by a second order polynomial equation of the parameters. Compressive strengths for the majority of HA cements were determined to be in the 100-160 MPa range which is significantly higher than those reported in the literature. © (2012) Trans Tech Publications.
Description: 23rd Symposium and Annual Meeting of International Society for Ceramics in Medicine, ISCM 2011; Istanbul; Turkey; 6 November 2011 through 9 November 2011
ISBN: 9783037852552
ISSN: 1013-9826
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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