Gallium-Doped β-Tricalcium Phosphate Ceramics: Characterization and Properties
A novel gallium-doped -tricalcium phosphate (-TCP) ceramics with rhombohedral structure (R3c space group) can be obtained by the addition of a Ga precursor in the typical reaction protocols used for the preparation of -TCP. It was found, from the refinement of their XRD patterns, that the incorporation of Ga in the -TCP network occurs by substitution of one of the five calcium sites, while occupation of another Ca site decreases in inverse proportion to the gallium content in the structure. A decrease of the unit cell volume is observed with increasing gallium content, together with improved mechanical properties. Indeed, the compressive strength of these new bioceramics is enhanced in direct proportion of the Ga content, up to a 2.6-fold increase as compared to pure -TCP.
Eyup Sabri Kayali, Gultekin Goller and Ipek Akin
C. Mellier et al., "Gallium-Doped β-Tricalcium Phosphate Ceramics: Characterization and Properties", Key Engineering Materials, Vols. 493-494, pp. 195-198, 2012