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Determination of Crystallites Size Distribution in Anatase Nanopowders by XRD
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SYSNO ASEP 0347110 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV Záznam nebyl označen do RIV Název Determination of Crystallites Size Distribution in Anatase Nanopowders by XRD Tvůrce(i) Matěj, Z. (CZ)
Matějová, Lenka (UCHP-M) RID, ORCID, SAI
Kužel, R. (CZ)Zdroj.dok. Abstracts. - St. Petersburg : -, 2010 - ISBN N Rozsah stran 86 /ms10-p14/ Poč.str. 1 s. Akce European Powder Diffraction Conference EPDIC 12 /12./ Datum konání 27.08.2010-30.08.2010 Místo konání Darmstadt Země DE - Německo Typ akce WRD Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova anatase ; size distribution ; powder diffraction Vědní obor RIV CC - Organická chemie CEZ AV0Z40720504 - UCHP-M (2005-2011) Anotace In this work the WPPM method free of any a priori size distribution functions was applied to crystallites size distribution analysis in nanocrystalline bulk TiO2-anatase powders. Two approaches were tested here. In the first case size distribution was represented like in by a histogram, which was refined by LSQ fitting. The number of bins in the histogram was small. In the second approach number of histogram bins was high, comparable with number of points in reflections profiles and the size distribution was revealed by a maximum entropy algorithm (MEM). Few regularization conditions had to be applied to the size distribution in both cases to achieve reasonable results for measured data. This is described in detail. The results of the LSQ fitting and the MEM algorithm are compared. The method was used for characterization of crystallites size distribution to tailor preparation process and size dispersion of produced TiO2 samples. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2011
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