抄録
Magnesium substituted hydroxyapatite (Mg-HA) thin films were prepared using rf-magnetron sputtering method. The Mg-HA films were coated onto a Ti substrate from a mixed HA/MgO powder target, which were undertaken in an Ar gas. The molar ratio of Mg to Ca in the mixture target was varied in the ratio of 0:10, 2:8, 4:6, 6:4, 8:2. The Mg-HA films were subjected to hydrothermal treatment. The crystallinity of the Mg-HA films were observed by X-ray diffractometer (XRD). The solubility of the Mg-HA films were measured by an immersion test using deionized water and phosphate buffered saline (PBS). From the XRD patterns, the hydrothermally cristallized HA (Mg:Ca=0:10) film and Mg-HA (Mg:Ca=2:8, 4:6) films revealed peaks from HA, and the Mg-HA (Mg:Ca=8:2) film revealed peak from MgO. From an immersion test, in deionized water, the more Mg-HA films contained Mg, the more solubility of the films decreased. In PBS, the more Mg-HA films contained Mg, the more solubility of the films increased.
