Abstract
Silicate-containing hydroxyapatite( SiAp) and hydroxyapatite (HAp) have been hydrothermally synthesized at 150°C under saturated steam pressure, Previously, the cation-exchange characteristics of these apatites in aqueous solution were investigated and the superior cation-exchange characteristics of SiAp seemed to be due to loosening effect on skeletal structure of the apatite by substitution of SiO44- for PO43- ions, In the present study, SiAp has been characterized mainly by X-ray photoelectron spectroscopy (XPS), and it has been confirmed that SiO44- ions instead of SiO2 were introduced into hydroxyapatite structure.
