ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Pr-CeO2 nano-crystalline red lanthanide pigments were prepared from cerium (III) nitrate hexahydrateand praseodymium oxide by low-temperature combustion synthesis. Its ignited temperature wasapproximately 250°C. The prepared pigments were characterized by DSC, XRD, SEM and XPS. Theresults showed that the crystallite size decreases with increasing Pr mol concentration. The valence ofpraseodymium in the pigments and its coloring mechanism were also investigated. The trivalent Prentered into CeO2 crystal lattice and formed Pr-CeO2 solid solution, which was based on the fluoritestructure. It substituted trivalent Pr for tetravalent Ce in CeO2 crystal and was compensated by oxygenvacancies, which caused the distortion and the defection of the crystal lattice. Therefore the pigments canabsorb the light with the wavelength of approximate 600nm and present the red tonality
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2068.pdf
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