Ceramics-Silikáty 54 (2) 97-102 (2010)

THE EFFECT OF SINTERING TEMPERATURE ON THE STRUCTURE AND DEGRADABILITY OF STRONTIUM-DOPED CALCIUM POLYPHOSPHATE BIOCERAMICS

Q. Wang, Q. Wang, X. Zhang, X. Yu, C. Wan

Calcium polyphosphate-based bioceramic composites containing 1 mol% Sr²⁺, assigned as strontium-doped calcium polyphosphate (SCPP), were prepared. Effect of sintering temperature (700, 800 and 900°C) on the microstructure and degradability of SCPP bioceramic were investigated. The result indicated that the strontium doped did not affect the crystal system and space group of calcium polyphosphate. The crystal structure of SCPP samples sintered at 700, 800 and 900°C was identified as β-CPP. The density and grain size of prepared samples increased with the increase of sintering temperature, from 2.46 g/cm³ and 2.33 μm at 700°C to 2.60 g/cm³ and 4.46 μm at 900°C. The in vitro degradation behavior of SCPP indicated the increase of the degradation rate with the sintering temperature.

Keywords: Strontium-doped calcium polyphosphate, Sintering temperature, Structure, Degradability