Fabricating densified hydroxyapatite ceramics from a precipitated precursor

Synthesis of nanocrystalline hydroxyapatite by using precipitation method

“…Nanocrystalline HAP powders exhibit greater surface area [6]. It can provide improved sinterability and enhanced densifi- cation to reduce sintering temperature [7]. Moreover, nanometer sized HAP is also expected to have better bioactivity than coarser crystals [8,9], nanophase ceramics clearly represent a unique and promising class of orthopedic/dental implant formulations with improved osseointegrative properties [9,10].…”

Preparation and thermal stability analysis of hydroxyapatite derived from the precipitation process and microwave irradiation method

“…However, the HAP biomedical application is limited in low-load positions because of its poor mechanical property at present. The plentiful research results show that the mechanical strength strongly depends on the sintering temperature for dense HAP, and the decomposition of HAP decreases sharply the mechanical strength of sintered dense HAP [6,7]. So preparation of thermally stable HAP powder is important to dense HAP ceramics.…”

Orthopedic nanoceramics

“…Mechanistically, the ultrafine calcium powders used for sintering nanostructured coatings can improve sinterability and enhanced densification due to their greater surface area-to-volume ratio (higher specific surface area), leading to dense, fine-grained microstructure in the nanocoatings [80]. First, mechanical strength and fracture toughness of the nanocoating can be much higher than those of the micron-sized coatings.…”