EVALUATION OF THE POTENTIAL OF BARIUM ZIRCONATE ON THE SINTERABILITY AND PROPERTIES OF BOVINE HYDROXYAPATITE

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PAZARLIOĞLU S. S., Bakdemir S. A., Gökçe H.

Ceramics - Silikaty, vol.67, no.1, pp.120-134, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 67 Issue: 1
  • Publication Date: 2023
  • Doi Number: 10.13168/cs.2023.0009
  • Journal Name: Ceramics - Silikaty
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, Metadex, Directory of Open Access Journals, Civil Engineering Abstracts
  • Page Numbers: pp.120-134
  • Keywords: Bovine hydroxyapatite, Barium zirconate, Sintering performance, Properties
  • Istanbul Technical University Affiliated: Yes

Abstract

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 MPa·m1/2 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.