ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Porous scaffolds of hydroxyapatite (HA), derived from calcined bovine bones and dopedwith various reinforcing materials, such as Ti, TiO2 and Li2O, were produced with the aid ofcommercial sugar, which was added as 20 wt% with respect to the total batch, and sintering at 1200°Cand 1300°C. The samples were characterized by SEM and X-ray diffraction analysis as well as byporosity measurements. The experimental results showed that porosity can be controlled by thecorrect selection of doping materials. The optimum sintering temperature was 1200°C since firing at1300°C caused extended sintering and thus porosity was considerably reduced. Matching of chemicalnature as well as thermal expansion coefficients between HA and the doping components are of highimportance for the structural integrity of the resultant scaffolds. Doping with Li2CO3 seemed to havethe highest potential for achieving high porosity, likely due to the decomposition to Li2O, but theamount of Li2CO3 used should not jeopardizing HA bioactivity. The use of natural sugar is aneconomic way of producing safe for the health porous HA scaffolds
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.411.pdf
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