Abstract
Titanium plates were treated in [Ti(O2)EDTA]2-– -Ca(EDTA)2- mixed solutions and/or Ca(EDTA)2- solutions (where EDTA is ethylene diamine tetra acetic acid) at pH 9–13 and 150–250 °C for 0.5–12 h. The film, about 50 μm thick, and consisting of mixtures of CaTiO3 and TiO2 was formed in 0.01 M [Ti(O2)EDTA]2- – 0.01 M Ca(EDTA)2- mixed solution at pH 13 and 250 °C for 6 h. The film consisted of large icosahedral and hexagonal particles, of about 10 μm diameter, and small aggregated particles, of about 1 μm diameter. On the other hand, the film, about 20 μm thick, consisted of hexagonal plate-like CaTiO3 particles, of about 1 μm diameter, was formed in 0.01 M Ca(EDTA)2- solution at pH 13 and 250 °C for 6 h. The thickness of both films increased with time, where the film formation rate in 0.01 M [Ti(O2)EDTA]2- – 0.01 M Ca(EDTA)2- mixed solution was much faster. The CaTiO3 film formed on the surface of titanium promoted the precipitation of hydroxyapatite on the substrate by the hydrothermal reactions in Ca(EDTA)2-–PO 3-4 mixed solutions.
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Fujishiro, Y., Sato, N., Uchida, S. et al. Coating of CaTiO3 on titanium substrates by hydrothermal reactions using calcium-ethylene diamine tetra acetic acid chelate. Journal of Materials Science: Materials in Medicine 9, 363–367 (1998). https://doi.org/10.1023/A:1013201627622
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DOI: https://doi.org/10.1023/A:1013201627622