S. Zhang et Ke. Gonsalves, PREPARATION AND CHARACTERIZATION OF THERMALLY STABLE NANOHYDROXYAPATITE, Journal of materials science. Materials in medicine, 8(1), 1997, pp. 25-28
Rod-like hydroxyapatite was synthesized by precipitating calcium nitra
te tetrahydrate and ammonium dibase phosphate in the presence of polya
crylic acid followed by hydrothermal treatment. Both polyacrylic acid
and the hydrothermal treatment stabilised the hydroxyapatite.