Cems Study Of Tin In The Hot End Coatings Of Glass Containers

Tin oxide coatings are applied to glass containers as adhesion promoters for organic lubricants. Room temperature conversion electron Mossbauer spectroscopy (CEMS) is used to analyse a range of tin oxide coated containers. Readable CEMS curves could be obtained even for the thinnest (30 CTU or about 6nm) coatings. The hyperfine parameters calculated from the spectral curves show that tin is tetravalent in crystalline form with a preferntial grain orientation, which is reduced on annealing. The presence of tin in other oxidation states and dissolved in the matrix was excluded.