Hydrothermal Crystallization of TiO₂ Gel Films on Ti Substrates and Formability of Hydroxyapatite

抄録

The crystallization of chemically-synthesized TiO₂ gel films by hydrothermal treatment was investigated. Pure Ti substrates were chemically treated with H₂O₂/HNO₃ to form a TiO₂ gel layer. The specimens were then hydrothermally treated with distilled water or an aqueous NH₃ solution in an autoclave at 453 K. By using NH₃, an adhesive and sufficiently crystallized TiO₂ could be synthesized on the Ti surface. TiO₂ greatly enhanced the deposition of hydroxyapatite on the surface during immersion in simulated body fluid.