The effect of phosphate source on the sintering of carbonate substituted hydroxyapatite
Source abstract
Abstract
Abstract Carbonate hydroxyapatite (CHAp) was synthesized by a wet precipitation method. In the synthesis, calcium oxide, H 3 PO 4 and (NH 4 ) 2 HPO 4 were applied as reactants. NH 4 HCO 3 in the amount of 0.05–0.20 mol per 0.3 mol of H 3 PO 4 or (NH 4 ) 2 HPO 4 was used as the source of CO 3 2− groups. Sintering was carried out using powders and uniaxially pressed samples of carbonate and non-carbonate hydroxyapatites. The influence of synthesis conditions as well as sintering atmosphere on sinterability and phase composition of the final ceramic materials was evaluated. It was found that using properly synthesized CHAp powders and CO 2 atmosphere during heat-treatment it was possible to obtain dense CHAp ceramics with 1% of CaCO 3 as the secondary phase at the temperature 300–350 °C lower than that required for non-carbonate hydroxyapatite. Chemical stability and bioactive potential of CHAp–CaCO 3 ceramics were confirmed by in vitro tests.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Bone Tissue Engineering Materials · Dental materials and restorations · Dental Implant Techniques and Outcomes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (21)
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