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Emission FTIR studies on the formation mechanism of IrO2/TiO2 based coatings

✍ Scribed by J. Kristóf; J. Mink; A. De Battisti; J. Liszi

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
337 KB
Volume
39
Category
Article
ISSN
0013-4686

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✦ Synopsis

The formation reactions of IrOfliO, mixed oxide tilms supported on metal titanium plate were followed by emission FTIR method. Coatings of the composition 50% Ir + 50% Ti obtained by thermal decomposition from the precursor mixture of IrCl,x3H,O/titanium(di-isopropoxide) bis-2,4pentanedionate were preheated to 210,392 and SOOT. At ZlOT-in addition to 2,4-pentanedionate-the presence of surface carbonyls as a result of decomposition of solvent (isopropanol) chemisorbed to iridium was confirmed. At 500°C the negative emission bands of rutile prove the occurrence of a surface segregation phenomenon resulting in a TiO, (or a TiO,-enriched) surface layer. The conversion of IrCI, to IrO, was also followed.

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