ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 67, (1) 120 - 134 (2023)


EVALUATION OF THE POTENTIAL OF BARIUM ZIRCONATE ON THE SINTERABILITY AND PROPERTIES OF BOVINE HYDROXYAPATITE
 
Pazarlioglu Suleyman Serdar 1, Bakdemir Seda Atas 2, Gokce Hasan 3
 
1 Marmara University, Technology Faculty, The Department of Metallurgy and Materials Engineering, Recep Tayyip Erdogan Campus, 34854, Maltepe, Istanbul, Turkey
2 National Defense University, Naval Academy, Tuzla, Istanbul, Turkey
3 Istanbul Technical Üniversite, Adnan Tekin Research Center, Macka Campus, Istanbul, Turkey

Keywords: Bovine hydroxyapatite, Barium zirconate, Sintering performance, Properties
 

In the present study, the potential of barium zirconate (BaZrO₃; 1-5 wt%) on the sinterability, and properties of bovine hydroxyapatite (BHA) was evaluated. BHA decomposed into beta and alpha-tricalcium phosphate (β and α-TCP) at a 4.7% rate. Tetracalcium phosphate (TTCP) was detected as the decomposition phase in the BaZrO₃ added BHAs, and it increased up to 10.7% with an increasing BaZrO₃ ratio. In addition to TTCP, the phases of BaZrO₃, Ba₂ZrO₄, σ-Ba₂P₂O₇, Ba₃P₂O₈ and CaZrO₃ were detected in the composites. The addition of BaZrO₃ at an amount of 3 wt% has a higher potential than the others to improve the sinterability and properties of BHA. It contributed to the increase in the fracture toughness from 0.99 ± 0.13 to 1.80 ± 0.12 MPam1/2 and the compressive strength from 115.75 ± 4.27 to 173.66 ± 13.61 MPa, and the decrease in the brittleness index from 4.24 ± 0.31 to 2.45 ± 0.15 μ-1/2. The in-vitro bioactivity of BHA also increases with the additional BaZrO₃. However; it is recommended to be used in applications that do not require load bearing in the human body due to its insufficient fracture toughness.


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doi: 10.13168/cs.2023.0009
 
 
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