SINTERED CERAMIC COMPOSITE IMPLANT MATERIAL AND ITS PREPARATION METHOD

摘要

PURPOSE: A preparation method of sintered ceramic composite implant material is provided which improves a bio-availability and mechanical hardness. CONSTITUTION: Alumina precursor is prepared by hydrolyzing aluminium isopropoxide and heat-treated at 80°C. And it is coated on the surface of zirconia power by a dispersing alumina precursor and zirconia power and calcined at about 500°C. Obtained coated zirconia power is mixed with hydroxyapatite for 24 hr in a ball mill and dried, sintered at 1,250°C for 1 hr in an inactive atmosphere such as argon gas under the pressure of 20MPa in a graphite mold. 3-50 volume%(preferably 20-50 volume%) of Alumina is added to the composite, 3-50 volume%(preferably 10-20 volume%) of zirconia is added to the composite.