| 摘要 |
PURPOSE:To obtain calcium phosphate ceramics which is made porous only on the surface to have the porous surface of high strength with a simple stage by treating the calcium phosphate ceramics consisting of a mixture composed of hydroxyapatite and tricalcium phosphate with an acid soln. CONSTITUTION:The calcium phosphate ceramics consisting of the mixture composed of the hydroxyapatite and tricalcium phosphate is treated with the acid soln. to elute the tricalcium phosphate selectively, by which the porous surface is obtd. The Ca/P ratio of the above-mentioned mixture is preferably 1.53-1.64. Calcination in the production of the calcium phosphate ceramics is preferably executed at 700-1,400 deg.C. For example, hydrochloric acid, sulfuric acid, nitric acid, etc., are usable as the above-mentioned acid soln. The pH of the acid soln. is preferably 1-5.5 and the treating time is 1sec-24hr. |
