Nanocrystalline hydroxyapatite ceramics

Abstract

The possibility of using high pressures in uniaxial pressing and rolling of nanopowders is investigated. Obtainment of a nanocrystalline hydroxyapatite ceramic intended for use in medicine is studied. The sintering temperature is reduced by approximately 600°C, and a ceramic with a grain size of less than 50 nm and high values of microhardness (up to 5.7 GPa) after annealing at 750°C is obtained. A substantial collective recrystallization of crystallite powder is overcome.