抄録
Electrolytic calcium phosphate depositions were investigated, particularly focusing on apatite. Calcium phosphates were deposited by electrolyzing Ca(H2PO4)2·H2O (MCP) solutions (0.02-0.20mol/dm3) added with and without NaNO3 at temperatures (10-50°C) and cathode current densities (5-120mA/cm2). Deposition products changed such as CaHPO4→CaHPO4·2H2O→Apatite with increasing current or decreasing MCP concentration. Adding NaNO3 or increasing temperature made the apatite deposition easy. At low temperatures or dilute MCP concentrations amorphous calcium phosphate tended to be deposited. The composition of deposited apatite was estimated to be (Ca»Na)10-x (HPO4, CO3)x(PO4)6-x(H2O» OH)2·nH2O; Ca/P-1.5.
