EVALUATION OF THE POTENTIAL OF BARIUM ZIRCONATE ON THE SINTERABILITY AND PROPERTIES OF BOVINE HYDROXYAPATITE
Süleyman Serdar Pazarlıoğlu
Abstract
In the present study, the potential of barium zirconate (BaZrO 3 ; 1-5 wt.%) on the sinterability, and properties of bovine hydroxyapatite (BHA) was evaluated.BHA decomposed into beta and alpha-tricalcium phosphate ( and -TCP) at a 4.7 % rate.Tetracalcium phosphate (TTCP) was detected as the decomposition phase in the BaZrO 3 added BHAs, and it increased up to 10.7 % with an increasing BaZrO 3 ratio.In addition to TTCP, the phases of BaZrO 3 , Ba 2 ZrO 4 , -Ba 2 P 2 O 7 , Ba 3 P 2 O 8 and CaZrO 3 were detected in the composites.The addition of BaZrO 3 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 MPam 1/2 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 -1/2 .The in-vitro bioactivity of BHA also increases with the additional BaZrO 3 .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.D: 2.832 0.003 gcm -3 H: 3.63 0.26 GPa LiAlO 2 (1-5 wt.%) S: 218 14.02 MPa [31] K c : 1.95 0.18 MPam 1/2 BI: 2.09 0.38 -1/2 Ceramics -Silikty 67 (1) 120-134 (2023)