ISSN:
1662-9779
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Physik
Notizen:
Characterization of heat-treated CaTiO3 thin films of 10, 20, 30 and 50 nm in thicknessand their change after immersion in a simulated body fluid were investigated by grazing incidentangle X-ray diffractometry and Auger electron spectroscopy (AES). The CaTiO3 films wereprepared on titanium substrate by sputter-deposition of CaTiO3 target followed by heating in anelectric furnace at 873 K in air for 7.2 ks. The CaTiO3 films were immersed in 0.8% NaCl solutionfor 14 d. All the films before heat treatment were non-crystallized films and after heat treatment,only the 50-nm film was crystallized to perovskite-type CaTiO3. In AES in-depth profiles afterheating, Ca diffusion was not observed in the 50-nm film, whereas Ca diffusion toward the Tisubstrate was observed in the 10-, 20- and 30-nm films. After immersion for 14 d, the vicinity ofsurface of the 10, 20 and 30 nm thick CaTiO3 films were dissolved into the NaCl solution, while the50-nm thick CaTiO3 film was scarcely dissolved. Since dissolution from biomaterials in a humanbody has possibility to harm, the CaTiO3 film should be deposited more than 50 nm in thicknessand heat-treated at 873 K
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.127.209.pdf
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