Fabrication of composite coating comprising bioactive calcium and sodium titanates on titanium using calcium hydroxide slurry containing sodium ions

Naofumi Ohtsu, Satoshi Semboshi, Chikage Abe, Susumu Tokuda

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We attempted to fabricate a composite coating comprising bioactive calcium and sodium titanates on titanium (Ti) using a calcium hydroxide (Ca(OH)2) slurry containing sodium ions (Na+). The coating procedure was as follows: a Ti substrate was buried in the slurry, which was prepared by mixing Ca(OH)2 powder with NaOH and/or NaCl solution, and the slurry was then heated at 923K in air. This procedure resulted in the formation of a composite coating comprising CaTiO3 and Na4Ti5O12 with a thickness of ca. 430nm on the substrate. When the composite coating was soaked in a simulated body fluid, calcium phosphate precipitated on the surface more rapidly than on a monolayer of CaTiO3. It is likely that dissolved Na+ from the coating promoted the formation of the calcium phosphate.

Original languageEnglish
Pages (from-to)3785-3790
Number of pages6
JournalSurface and Coatings Technology
Volume205
Issue number13-14
DOIs
Publication statusPublished - 2011 Mar 25

Keywords

  • Bioactivity
  • Calcium phosphate
  • Chemical treatment
  • Surface modification

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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