Effect of Precipitation Method on Properties of Hydroxyapatite Powders

A.B. Hazar Yoruça, A. Karakaşa, E. Ayasb and A. Koyuna aScience and Technology Application and Research Center, Yildiz Technical University, 34349, Istanbul, Turkey bMaterials Science and Engineering, Anadolu University, 26555, Eskişehir, Turkey

Full Text PDF

The aim of this study was the compare the properties of hydroxyapatite as a function of two different methods (chemical and biomimetic precipitation). Powder products were called as chemical hydroxyapatite for chemical method and biomimetic hydroxyapatite for biomimetic method. Precipitated powders with both methods were characterized by Fourier transform: infrared, X-ray diffraction, X-ray fluorescence and measurements of hardness and density. Chemical analysis results showed that dried-biomimetic hydroxy-apatite sample consists of hydroxy-apatite [Ca10PO4)6(OH)2] as main phase and beta-tricalcium phosphate (β-TCP) as secondary phase and dried-chemical hydroxy-apatite sample also includes pure hydroxy-apatite phase. Chemical hydroxy-apatite and biomimetic hydroxy-apatite powders were sintered using by spark plasma sintering method. Vickers hardness values of sintered disk samples were measured. Furthermore chemical structure of the final products was analyzed. Also density values of chemical hydroxy-apatite and biomimetic hydroxyapatite disks were measured. Finally it is concluded that different precipitation methods affect hydroxyapatite properties and this can be an advantage for biomedical applications.

DOI: 10.12693/APhysPolA.123.371 PACS numbers: 87.85.J-