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Nanocrystalline hydroxyapatite derived from eggshell (HA-Es) was successfully prepared via a direct solid-state sintering method. The process involved mixing calcined eggshell powder and dicalcium hydrogen phosphate di-hydrate followed by a heat treatment at 800°C. The resulting flower-like HA-Es powder was sintered at various temperatures ranging from 1050°C to 1350°C for 2h in air atmosphere. The...
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